Owners’ Manual

and Installation Guide

INCLUDING

BASS MEKANIK
T-CLASS digital amplifiers

HAND - CRAFTED IN FLORIDA, U. S. A.

Thank-you for choosing U.S. Amps! You have purchased the finest product of its type
available. Each U.S. Amp is built by hand in our Gainesville, Florida factory. Nothing is
done "off shore" or across the border. You won't just listen to your U.S. Amp, you will
experience it. When properly installed, this unit will provide years of trouble-free service..

This manual is written for the experienced installer. Please read it in its entirety before
installation. If you are unfamiliar with the terminology and concepts within, we strongly
recommend you seek the assistance of an Authorized U.S. Amps Dealer or other car audio
professional. Authorized Dealers can be located on the U.S. Amps website: www.usamps.com,
or by calling the U.S. Amps Factory - Monday thru Friday at (352)-338-1926, 9am to 5pm EST.
Our 24 FAX line is (352)-371-4122. Remember, protect your hearing and enjoy your U.S. Amp!

Table of Contents:
Installation: 3 USA-2000 / 2000X- 16

Active Electronic Crossovers: 4,5 USA-4300X- 17,18

Bridging Your U.S. Amp- 6,7 USA-5600X- 19,20

Getting Wired- 8 BASS MEKANIK

T-Class
Explained- 21-23
Batteries- 8,9
PT-35o- 24
Amplifier Protection- 9 PT-8oo, pt-11oo- 25

Amplifier Specifications- 10,11 Factory Warranty Service- 26

USA-200 / 200X, USA-400 / 400X- 12.13 Limited Warranty- 26

USA-50HC, USA-100HC, Never-Never Land- 27

USA-600 / 600X,
USA-1000 / 1000X- 14,15 Other Cool Stuff- 27,28

Did you buy the right U.S. Amp?

There is a U.S. Amp for every purpose. If your needs require maximum amplifier power into 4 or 2
ohms per channel, or 4 ohms bridged, use one of the Xterminator “X” models for the best results.
If you have more than a pair of speakers, or if the speakers have multiple voice coils, you may need
the extra current and low impedance stability of the USA Series. The USA Series develops
maximum output when used at 1 ohm per channel or 2 ohms bridged.
If you participate in sound-off events, the “HC” (High Current) amplifiers are designed to operate at
ultra-low impedances.

2
INSTALLATION
Amplifier Mounting:
Choose an appropriate location to mount the amplifier(s). Make sure your choice is free from
excess heat, moisture, and vibration. Under the vehicle seat or in the trunk are common mounting
locations. Be sure the amplifier receives adequate ventilation to its heat sink and is positioned
away from flying luggage and people’s feet. Do not mount the amplifier directly to speaker
enclosures.

Ventilation:
It is important to provide the amplifier with adequate ventilation to remove heat from the amplifier
heat sink. During high performance applications, in which the amplifier may be exposed to low
impedance loads, it may be necessary to provide external ventilation via a fan or some other
means. With proper ventilation, the “run time” of the amplifier between thermal protection cycles
can be greatly extended.

Amplifier and Crossover Input:

U.S. Amps feature a unique isolated input section that will accept signal voltages from 250 mv to
10 volts. The input section also provides amplifier ground isolation for the prevention of system
and engine noise. The unique configuration of the U.S. Amps input necessitates a correct input
ground, and is not compatible with external ground-isolation devices.

IMPORTANT NOTICE
The input of a U.S. Amp MUST be grounded for proper amplifier operation.
The use of external ground isolation dividing devices is unnecessary
and may cause severe amplifier and / or system damage.

Signal Level (BTL) Input:

This product will accept line and signal level, and can be used with most BTL “high powered”
sources. To use a BTL source, observe the following:
1) BTL outputs have two “hot” non-grounded leads per channel. Select ONE per channel, and
connect it to the “center conductor” of the RCA input cables going to the amplifier input.
2) Insulate and disregard the second wire of each BTL output pair.
3) Ground the shield wires of the RCA cable to the metal body of the source unit.

Gain Control Adjustment:

Always start with the gain control fully counter-clockwise (all the way down), or just slightly open.
Adjust the source unit volume as high as possible without distortion. Increase the amplifier gain
until the amplifier distorts, then turn the gain down slightly until the signal becomes clear. It is
desirable to operate the amp at the lowest possible gain setting to help reject spurious system
noise.

3
ACTIVE ELECTRONIC CROSSOVERS
US-X2
The US-X2 and US-X2R are two-way crossovers that “split” the full-range

HIGH PASS

LOW PASS
GROUND

REMOTE
AMP REMOTE
POWER

RIGHT

INPUT
LEFT

RIGHT

LEFT

RIGHT

LEFT
audio signal into two groups of frequencies- high and low. Each group is
sent to a dedicated amplifier, which in turn, powers a speaker or speakers
that are best suited to play those frequencies.
Both units have independent controls to adjust the “roll-off” of the high and
ACTIVE ELECTRONIC CROSSOVER
MODEL US-X2

OUTPUT GAIN
BASS BOOST
MADE IN

FREQUENCY
low frequencies from 50Hz to 500Hz at 12 Db per octave. FLORIDA,
U. S. A.

HIGH

LOW
The low frequency control limits the high frequency response of the low pass output, and the high
frequency control limits the low frequency response of the high pass output. Both units feature a variable
Bass Boost that emphasizes frequencies in the 65Hz range up to 20Db. The US-X2R is a more featured
unit with dual inputs and two high pass outputs that can be independently adjusted. The US-X2R will “fade”
between two mid and high amps, but if only one input pair is available, the dual input can be defeated.

The US-X2R comes with

an optional “Remote Bass
Gain” or “RBG” that can be
mounted in the passenger
US-X2R
compartment to Front Mid / High Front Mid / High
independently attenuate Input Gain Variable Bass Boost Rear Mid /High
the low pass output. The REAR Mid / High 65Hz - 0 to 20Db Low Pass
Bass Gain located on the Input Gain Crossover
cut-away side of the unit is frequency
used both to set the level of adjustments
the low pass output and LOW PASS (Bass)
control the range of the Power LED
GAIN: Sets the level of
RBG. It does not matter low pass ouput and

POWER
FREQUENCY
REAR HIGH
BASS BOOST

FREQUENCY
LOW PASS
REAR GAIN
FRONT GAIN

FREQUENCY
FRONT HIGH

which way regulates the range of

the Remote Bass Gain

Source Unit SINGLE / DUAL INPUT BASS

GAIN Active Electronic Crossover
SWITCH: US-X2R will SINGLE

INPUT
MODEL US-X2R
MADE IN FLORIDA,
accept input from dual DUAL (FADE)
U. S. A. !
RCA pairs to “fade”
OUTPUT
HIGH PASS
FRONT

OUTPUT
HIGH PASS
REAR

AMP REMOTE
BASS GAIN
REMOTE
OUTPUT
PASS
LOW

GROUND

(as shown) Mid / High

REMOTE
INPUT
FRONT

INPUT
REAR

POWER

levels from front to rear o

FRONT MID / HI
OUTPUT GROUND
Adjustable To the Vehicle
0-9 Volts, REAR MID / HI LOW PASS Chassis
50-500Hz OUTPUT OUTPUT
Adjustable Adjustable POWER Fuse
at 3 Amps
HAND-CRAFTED IN FLORIDA, U. S. A.

HAND-CRAFTED IN FLORIDA, U. S. A.

HAND-CRAFTED IN FLORIDA, U. S. A.

0-9 Volts, 0-9 Volts,

50-500Hz 50-500Hz REMOTE
BASS GAIN
Install in REMOTE Positive 12
Vehicle Volt Trigger From Source
Passenger
Compartment AMP REMOTE Positive 12
Volt Trigger to Amplifiers

4
the RBG cable is connected. Use a common screwdriver tip or something like it to tighten the RBG knob.
The US-X3 is a three-way unit that further divides the frequencies for three amplifiers. The features and
operation are similar to the others with the addition of the third mid range channel, and its gain. There are
separate high, mid and low mid frequency controls, and the mid range output can be inverted 180 degrees
with a switch to correct for real-life speaker placement.

US-X3 GROUND
To the Vehicle LOW PASS MID RANGE HIGH PASS
Chassis OUTPUT OUTPUT OUTPUT
Adjustable Adjustable Adjustable
0-9 Volts, 0-9 Volts, 0-9 Volts,
POWER Fuse 50-500Hz 50-500Hz 500-5KHz
at 3 Amps Low Mid
HAND-CRAFTED IN FLORIDA, U. S. A.
500-5KHz

HAND-CRAFTED IN FLORIDA, U. S. A.

HAND-CRAFTED IN FLORIDA, U. S. A.
High Mid
REMOTE Positive 12
Volt Trigger From Source
SUBS MID-BASS/ TWEETS
MIDS
AMP REMOTE Positive 12
Volt Trigger to Amplifiers
Source Unit

o
LOW PASS
AMP REMOTE

INPUT
OUTPUT
OUTPUT
GROUND

REMOTE
POWER

OUTPUT

LOW PASS FADER

MAIN
HIGH

INPUT
LOW

MID

Can be activated or
LOW PASS
FADER
OFF

defeated with this switch

ON

2-WAY / 3-WAY OPERATION

3-WAY

MODE
2-WAY

MODEL US-X3 0
When used in the 2-Way mode
MADE IN FLORIDA, U. S. A.
PHASE
180 both the High and Mid Outputs
have Mid / High Output signals
BASS BOOST
FREQUENCY
FREQUENCY
FREQUENCY

FREQUENCY
HIGH PASS

HIGH GAIN
LOW PASS

LOW GAIN
HIGH MID

MID GAIN

adjustable from 50-500Hz via

LOW MID
POWER

o the Low Mid Frequency Control

MIDRANGE PHASE INVERSION

POWER Inverts the Midrange Output
LED phase 180 degrees to correct
for off-axis frequency response
BASS LOW MID HIGH
BOOST OUTPUT OUTPUT OUTPUT
FREQUENCY 0 - 20Db 0-9 Volts 0-9 Volts 0-9 Volts
ADJUSTMENTS:
LOW PASS: 50Hz-500Hz HIGH MID: 500Hz-5KHz LOW MID: 50Hz-500Hz HIGH PASS: 500Hz-5Khz

U.S. Amps crossovers feature an isolated input and amplifier section to keep the system free of
noise. It is important to ground the crossover input for proper operation. Do not use a floating
ground isolator with this or any other U.S. Amps product.

5
BRIDGING YOUR U.S. AMP

All U.S. Amps listed in the following section can be used in the BRIDGED mode, meaning that both
channels of the amplifier are used together as a powerful single channel, usually to drive a group of
subwoofers. Since subwoofers come in a wide variety of types and impedances, U.S. Amps
makes different groups of amplifier models to work best with specific speaker systems. To get the
most power from your amp, match it by model and code to one of the following diagrams. Great
care has been taken to optimize your amplifier’s performance when wired as recommended, so
please follow these diagrams carefully. The on-board SAT “SMART AMP TECHNOLOGY”
protection circuit on the USA-150, 300, 700T, and 2000 types carefully monitors and records
amplifier performance, including the suitability of the load in comparison with the amplifier type.

SPEAKER MYSTERIES EXPLAINED

Think of the speaker as an electric motor and the Amp as the wall-current that makes it “run”. The
two principals in fact, are very similar. All speakers have a motor, consisting of the permanent
magnet at the rear of the speaker and a “voice coil” that attaches to the speaker cone and rides
back in forth in the center of the magnet. Just like a motor you would plug into the wall and say,
vacuum the floor, the amp powers the voice coil which in turn reacts to the permanent magnetic
field by pushing and pulling against it. The resultant motion moves the speaker cone and wall-la!
You have sound! (Normally U.S. Amps wouldn’t care about speakers, but we have been asked to
explain this function in greater detail-Harrumph!)

Each voice coil has a resistance, or impedance, that is crucial to the way it reacts with a given
model of U.S. Amps and vice versa. This resistance is measured and expressed in OHMS, or
Ohms of resistance. Put simply, OHMS are the things that keep the amplifier speaker leads from
shorting together, which is a no-no. The less OHMS a speaker has, the closer the electrical
potential of the amplifier will be to shorting.

Speakers are typically available with 8, 4, or 2 ohm coils. There is a great deal of difference
between these ratings, as with the order of magnitude of the numbers 8,4, and 2 themselves. As 4
is TWICE as much as 2 and 8 is TWICE as much as 4, the amount of current an amplifier must
provide to drive a 4 ohm speaker is TWICE that required to drive an 8 ohm speaker, a 2 ohm coil
requires TWICE the current of a 4 ohm coil. While all this seems academic, is nonetheless of vital
importance, and is perhaps the most overlooked and unfortunate reason for expensive system
failure. Just like an electric motor and the wall socket, it is possible to stack more motors on the
circuit than it can handle.

HIGH CURRENT OR HIGH VOLTAGE?

Before you form the opinion that higher current amps are obviously better, forget it. High current is
simply a way to get power under a different circumstance. All amplifiers have current and voltage.
Really, one comes at the expense of the other, but they are both equally effective at delivering
power. “Power” is measured in WATTS, like a light bulb, and is the product of a mathmatical
equation that takes into account the current and voltage output of the amplifier in relation to the
resistance, or OHMS of the voice coil or voice coil combination. (Impedance is another word for
resistance, and the two are often interchangeable.) Let’s totally geek out together and examine
this formula, as it will help you understand the role voltage and current play in relation to speaker
impedance and power:

6
The equation is kind of divided into 2 parts. If you take the time to check this out, you will see what is
REALLY COOL about amplifier bridging, and why it is so important to pay attention to the numbers.

PART ONE:

VOLTS RESISTANCE CURRENT

WORKING MODEL:
You have a two-channel amplifier. Each channel that has 20 VOLT “power rails”.
You have a speaker with 4 OHMS of RESISTANCE.

If you hook ONE CHANNEL to the speaker and do the math:

20 4 5
”5” is AMPS OF CURRENT. (“AMPS” and “CURRENT” are another one of
those interchangeable words.) Next, we will use the answer of this
first part and the “rail voltage” to determine WATTS OF POWER.

PART TWO:

VOLTS X CURRENT WATTS

20 X 5 100
So, whaddya know? You’re putting out 100 WATTS! Well, that’s all fine and dandy until you BRIDGE your
amp. There is hidden mathmatical advantage in doing so, and the only thing that can hold you back are
THE LAWS OF PHYSICS. Each channel of your amp has a positive and negative “rail voltage”. Engineers
speak of “power rails” when they refer to amplifier voltage, hence the name. Your 20 VOLT amp REALLY
has a POSITIVE 20 VOLTS and a NEGATIVE 20 VOLTS, but you are only using HALF of it for each
channel. So, you break bad with the built-in bridging capability of your U.S. Amp, and all of a sudden you
have a single 40 VOLT BRIDGED CHANNEL.

SO, LETS’ SUBSTITUTE 40 VOLTS FOR 20 AND DO THE MATH:

40 4 10
AND HOW MANY WATTS IS THAT?

40 X 10 400
Yes, Pilgrim, you are now cooking with gas. The only thing holding you up is real life. The V divided by R
equals A thing fails to take into account the physical limitations of friction and loss, let alone the mechanical
limitations of components and design. These are considerable factors. Luckily for you, U.S. Amps
overcompensates from this standpoint, and delivers TRUE RATED 2 ohm per channel performance. Most
amplifiers are not built with the intestinal fortitude necessary to double PER CHANNEL power from 4 to 2
ohms, which as you see, QUADRUPLES your
Bridged output. Don’t worry- U.S. Amps has you covered.

7
GETTING WIRED
Once you have established the current needs of your system, it will be of the UTMOST
IMPORTANCE to properly fuse the amplifier. Remember, power connections are always the last
thing. There cannot be enough emphasis placed on the importance of proper fusing. Fuses
prevent catastrophes. Always fuse each U.S. Amp product at or less than the recommended
amperage. Another major consideration is wire. If you wish to build a truly high-powered system,
you must take into account the total amperage requirements of the system and select your wire
gauge accordingly. The following chart can be used as a guide:

WIRE GAUGE AND AMPERAGE GUIDE

AWG 14 30 AMPS AWG 6 80 AMPS AWG 0 190 AMPS

AWG 12 35 AMPS AWG 4 105 AMPS AWG 00 215 AMPS

AWG 10 45 AMPS AWG 2 135 AMPS AWG 000 245 AMPS

AWG 8 60 AMPS AWG 1 160 AMPS AWG 0000 275 AMPS

These are real numbers, right out of the 1951 U.S. Federal Electrician’s Code Book. It takes real
wire to do real work. Trust us on this one.

BATTERIES
Batteries, and the way they operate, is one of the least understood, yet critical element of any
healthy car audio system. Even small, highly efficient systems need a minimum amount of
amperage and voltage to operate properly. The average automotive battery is designed only to
start the vehicle, not run the stereo, the lights, or anything else. That job goes to the vehicle
alternator, once the engine has been started.

The alternator also recharges the battery, replacing the energy used to start the engine within a
matter of minutes. The actual work done by the battery is minimal. If the current drawn by the
vehicle lights and other electrical accessories does not exceed the amperage output of the
alternator, the average battery will last for years.

The audio system, particularly the amplifiers, add to the current draw. Most stock alternators have
excess output, anywhere from 30 to 50 amps, maybe more. A safe way to determine whether your
electrical system is adequate to handle your U.S. Amp(s) is to use one-half of the amplifier fuse
rating as a constant to determine the average current draw of the system. Unless you are one of
those people who uses your amplifier to play a sine wave, (in which case you are on your own) your
amp will not draw peak current all the time when playing music. This isn’t rocket science , but it
gets the job done. Another way is to use the charts on pages 10 & 11 to determine actual amplifier
output based on the impedance that each channel is operating.

For each 100 watts, when playing music, count on

7.5 amps average of average current draw.

8
CARE AND FEEDING OF YOUR BATTERIES
As mentioned before, most batteries are built for the relatively light chore of starting the engine.
Unless you have the room and ambition to install an upgraded high-powered alternator, your
system current requirements may exceed the charging capability of your car’s electrical system.
When this happens, you have to rely on the vehicle battery(s) to make up the difference. Another
factor to consider is voltage. Although the electrical system is
considered to be “12 volt”, the battery, when healthy, actually “rests”at 12.6 volts. The average
alternator “puts out” 14.4 volts when the engine is on, because it is necessary to “feed” a battery
higher voltage in order for it to charge.

AMPLIFIER PROTECTION: SAT (Smart Amp Technology)

SAT is an exclusive U.S. Amps technology that continuously monitors amplifier functions to insure
proper connection, supply voltage, and operating temperature. In the event of a fault condition
SAT will trigger a protection circuit to immediately shut down the amplifier. Computerized SAT,
available on the USA-150 and larger models, stores amplifier data and tracks specific faults by
type and frequency for computer download and display. Never before has such a comprehensive
analysis tool been offered on a car amplifier. Practical and useful, SAT is a diagnostic and
information retrieval system that uses a programmable on-board
computer to protect the amplifier from damage and permanently store vital information like:

Amplifier model and serial number.

Date of manufacture.

Total hours, minutes, and seconds

the amp has ever been on.

How often an individual channel has

shorted.

How often the vehicle battery has gone

under or over voltage.

How often the amplifier has gone into

thermal
S. A.
, U.
IDA
FLOR
D IN

protection.
AFTE
-CR
ND
HA

For the Authorized Dealer SAT provides real-time

analysis and in-car diagnostics. The amp can be
remotely triggered on by SAT, and at a glance the
"live console" displays whether or not all amplifier
systems are functional.

9
 AMPLIFIER
POWER and FUSE
Specifications*

Watts per Channel

Model 4 Ohms 2 Ohms 1 Ohm .5 Ohm .25 Ohm Fuse
200 50W 100W N/A N/A N/A 25A

400
TM

100W 200W N/A N/A N/A 50A

600 150W 300W N/A N/A N/A 75A

1000 300W 500W N/A N/A N/A 135A

2000 500W 1000W N/A N/A N/A 300A

4300 75W x 4 90W x 4 N/A N/A N/A 60A

5600 75W x 4
200W x 1
90W x 4
350W x 1
N/A N/A N/A 75A

USA-200 25W 50W 100W N/A N/A 25A

USA SERIES

USA-400 50W 100W 200W N/A N/A 50A

USA-600 75W 150W 300W N/A N/A 75A
USA-1000 150W 300W 500W N/A N/A 135A
USA-2000 250W 500W 1000W N/A N/A 300A
MEKANIK COMPETITION

USA-50HC 25W 50W 100W 188W N/A 75A

USA-100HC 50W 100W 200W 400W N/A 225A
PT-35O 175W N/A N/A N/A N/A 35A
BASS

PT-8OO 400W N/A N/A N/A N/A 80A

PT-1OOO 550W N/A N/A N/A N/A 110A

Copyright 2001 U.S. Amps Inc. All rights Reserved. *Specifications subject to change without notice.

10
 AMPLIFIER
PERFORMANCE
Specifications*

THD @ Damping Slew

Model Bridged Output
4 Ohms
S/N Ratio
Factor** Rate
200 200W @ 4 Ohms < .006% 102dB > 200 30Vus

400
TM

400W @ 4 Ohms < .006% 102dB > 400 30Vus

600 600W @ 4 Ohms < .006% 110dB > 600 150Vus

1000 1000W @ 4 Ohms < .006% 110dB > 800 150Vus

2000 2000W @ 4 Ohms < .006% 115dB > 1000 150Vus

4300 180W x 2
@ 4 Ohms < .006% 102dB > 200 150Vus

5600 Not Bridgable < .006% 102dB > 200 150Vus

USA-200 200W @ 2 Ohms < .006% 102dB > 200 30Vus

USA SERIES

USA-400 400W @ 2 Ohms < .006% 102dB > 400 30Vus

USA-600 600W @ 2 Ohms < .006% 110dB > 600 150Vus

USA-1000 1000W @ 2 Ohms < .006% 110dB > 800 150Vus

USA-2000 2000W @ 2 Ohms < .006% 115dB > 1000 150Vus

MEKANIK COMPETITION

USA-50HC 375W @ 1 Ohm < .006% 110dB > 600 150Vus

USA-100HC 800W @ 1 Ohm < .006% 115dB > 1000 150Vus

PT-35O 350W @ 4 Ohms < .05% > 86dB > 100 150Vus
BASS

PT-8OO 800W @ 4 Ohms < .05% > 86dB > 100 150Vus

PT-1OOO 1100W @ 4 Ohms < .05% > 86dB > 100 150Vus

Copyright 2001 U.S. Amps Inc. All rights Reserved. *Specifications subject to change without notice.
**Measured at 4 Ohms at the circuit board.

11
 USA-200 / 200X
USA-400 / 400X
Controls and Features

Built-in Active Crossover / Line Level Output: Amplifier Input:

The 2-way fixed-frequency 100Hz crossover can be configured to The USA-200 and 400 feature
input the stereo high pass signal at 18db and output the summed- input isolation and a built-in
mono low pass signal at 24db to another amplifier, or vice-versa. The voltage divider that will accept
crossover can be defeated for full-range preamp output. input signals from nearly any
source. It is necessary to
provide input to both channels
when operating the amplifier.
2
Two - Way
Line Out 100Hz
4Db
24
Active Xover GAIN
Input
Input Sensitivity is variable from
H L F
I o u 250mv to 10 Volts.
R L g w l R L
h l MAX

USA-400 WARNING
One Ohm Stable Stereo Amplifier. Made In Florida, U. S. A. U.S. Amps require a
grounded input connection.
DO NOT use ground-loop
Power LED Indicator: isolation devices on the
The green light in the middle of the palm input of your U.S. Amp!
tree is connected to the amplifier’s power Gain Control:
supply, and only lights when the amplifier is
The gain control is water and dust proof for long life and
in working order.
high fidelity. The input sensitivity can be infinitely adjusted
from 250mv to 10 Volts.
Smart Amp Technology:
Both models incorporate a non-computerized version of SAT (U.S. Amps’ exclusive Smart Amp
Technology) that precisely monitors each amplifier channel, the battery voltage, and amplifier temperature.
In the event of a fault condition, SAT will activate to protect the amplifier from damage.

Well-Engineered From Connections:

Quality Materials: All power and speaker connections are via a heavy duty barrier
The USA-200 and 400 feature Mil- terminal with gold plated hardware. Use at least 10 gauge wire
Spec FR-4 plated-through circuit for all power and ground connections.
boards, stuffed with 1% tolerance
parts and U.S. Amps’ own hand-
wound power transformers. The
amplifiers are housed in a
bead-blasted or custom
polished anodized heat sink.
The U.S. Amps logo is laser-
etched or displayed on a
Solid zinc emblem.

Clear Plexiglas Bottom:

U.S. Amps are hand-crafted to a high standard of quality in our Gainesville, Florida factory, and are
thoroughly inspected for both cosmetic and operational perfection. A clear bottom panel displays the
attention to detail found in every U.S. Amp.

12
USA-200 / 200X, USA-400 / 400X
Stereo Operation Source Unit
Positive 12 Volt Remote
LEFT Turn-on
SPEAKER(S)

Left Negative
Positive 12 Volts to Vehicle Battery
Left Positive Min. 10 Gauge

Power Per Channel: Left

Pos
Left
Neg REM
12V
Pos ALWAYS FUSE AT BATTERY
USA-200: F
4 Ohms: 25 Watts U USA-200: 25 Amps
2 Ohms: 50 Watts
1 Ohm: 100 Watts
Right Right
Pos Neg X GND S 200X: 25 Amps
E USA-400: 50 Amps
Xterminator 200X: 400X: 50 Amps
4 Ohms: 50 Watts
2 Ohms: 100 Watts

USA-400:
4 Ohms: 50 Watts
2 Ohms: 100 Watts
1 Ohm: 200 Watts

Xterminator 400X:
4 Ohms: 100 Watts
2 Ohms: 200 Watts
Vehicle Battery
11 - 15 Volts DC
RIGHT
SPEAKER(S)

Right Positive
Negative 12 Volts to
Vehicle Ground. Min. 10 Gauge
Right Negative

Switched 12 Volts out - 500ma

Vehicle Ground

Bridged Mono
Bridged
Total Bridged Output Left Left 12V
Speaker(s) Pos Neg REM Pos
USA-200: 200 Watts @ 2 Ohms Bridged
Negative 200X: 200 Watts @ 4 Ohms Operation:
USA-400: 400 Watts @ 2 Ohms
400X: 400 Watts @ 4 Ohms
Right Right
Pos Neg X GND Right Pos (+)
Left Neg (-)
Positive
Left Left REM 12V
Pos Neg Pos
Right Right
Pos Neg GNDX
13
 USA-50HC, USA-100HC,
USA-600, 600X, USA-1000, 1000X,
USA-2000 and 2000X
Controls and Features
Amplifier Input:
Active 24dB Low Pass Crossover:
These models feature input isolation and a built-in
The low-pass crossover can be infinitely
voltage divider that will accept input signals from
adjusted to “roll off” at 24db per octave
nearly any source. It is necessary to provide input to
at frequencies between 50Hz and 500Hz. The
both channels when operating the amplifier. Input
crossover can be defeated for
sensitivity is variable from 250mv to 10 Volts.
full-range operation.
WARNING: Gain Control:
U.S. AmpsWARNING
WARNING: require a grounded The gain control is water and dust
Subsonic Filter:
input
U.S. connection.
Amps
U.S. Amps require DO NOT use
require
a groundeda proof for long life and high fidelity. To optimize amplifier power
grounded
ground-loop input connection
isolationDO
input connection. NOT .use
devices The input sensitivity can be infinitely in the audible frequencies, a
DO
on NOT use ground-loop
the input ofisolation
your U.S.devices
Amp! adjusted from 250mv to 10Volts. defeatable 36 Hz subsonic
ground-loop
isolation devices on the filter provides a 12dB per
on theof your
input inputU.S.
of your U.S. Amp!
Amp! octave roll-off.

Remote
Bass Gain:
When the low-
pass crossover
is “ON” the amp- Smart Amp Technology:
lifier volume can Both models incorporate a SAT
be adjusted remotely from the passenger (U.S. Amps’ exclusive Smart Amp
compartment, independent of the system
volume. The RBG works within the input
Technology) that precisely
monitors and tracks vital amplifier
SAT
volume range set by the GAIN control, information, including the type
and is about 75% effective. The RGB and frequency of fault conditions ,
comes with a knob and 15’ of cable. battery voltage, and amplifier
t e m p e r a t u r e . A
Clear Plexiglas Bottom: built-in computer stores data that Data
U.S. Amps are hand-crafted to a high standard can be read by the Dealer with a Out
of quality in our Gainesville Florida factory, and U.S. Amps data port interface to
are thoroughly inspected for both cosmetic aid in system problem-solving. In
addition, SAT keeps permanent
Exclusive
and operational perfection. A clear bottom
panel displays the attention to detail found in record of the amplifiers’ serial Smart Amp
every U.S. Amp. number and time of operation. Technology

14
USA-50HC, USA-100HC, USA-600 / 600X, USA-1000, / 1000X
Stereo Operation
Source Unit
LEFT
SPEAKER(S)
Note Dual Positive
Left Negative
Power and Gound 12 Volt
Connections Remote
Switched
Left Positive 12 Volt Turn-on
Output

Left
Pos
Left
Neg GND 12V
Pos X REM
Power Per Channel:
USA-50HC: USA-100HC
Right Right GND 12V
4 Ohms: 25 Watts 4 Ohms: 50 Watts Pos Neg Pos
2 Ohms: 50 Watts 2 Ohms: 100 Watts
1 Ohm: 100 Watts 1 Ohm: 200 Watts
½ Ohm: 188 Watts ½ Ohm: 400 Watts
ALWAYS FUSE AT BATTERY
USA-600: USA-600:
4 Ohms: 75 Watts 4 Ohms: 75 Watts USA-50HC: 75 Amps
2 Ohms: 150 Watts 2 Ohms: 150 Watts Positive USA-600: 75 Amps
1 Ohm: 300 Watts 1 Ohm: 300 Watts USA-600X: 70 Amps
12 Volts F
600X: 600X: to Vehicle U USA-1000: 135 Amps
4 Ohms: 150 Watts 4 Ohms: 150 Watts Battery S USA-1000X: 135 Amps
2 Ohms: 250 Watts 2 Ohms: 250 Watts 8 Gauge E USA-100HC: 135 Amps
Wire

RIGHT
SPEAKER(S)
Right Positive

Vehicle Battery
Right Negative 11 - 15 Volts DC

Negative 12 Volts to
Vehicle Ground. Min. 8 Gauge

Bridged Mono Total Bridged Output

Bridged USA-50HC: 375 Watts @ 1 Ohm Left Left 12V
Speaker(s) USA-100HC: 800 Watts @ 1 Ohm Pos Neg GND Pos
USA-600: 600 Watts @ 2 Ohms Vehicle
Negative
USA-600X: 600 Watts @ 4 Ohms Ground
USA-1000: 1000 Watts @ 2 Ohms Right Right
Pos Neg GND 12V
Pos
USA-1000X: 1000 Watts @ 4 Ohms
Positive Bridged
Operation:
Left Left GND 12V
Pos Neg Pos Right Pos (+)
Right Right GND 12V Left Neg (-)
Pos Neg Pos

15
USA-2000 and 2000X
Stereo Operation
Source Unit
ALWAYS FUSE AT BATTERY
300 AMPS
Positive Vehicle Battery
12 Volt F 11 - 15 Volts DC
Remote U
Turn-on S
E
Switched Switched
12 Volt Vehicle Vehicle 12 Volt
Output Ground Ground Output
500mA Max 500mA Max Power Per Channel:
USA-2000:
Not 4 Ohms: 250 Watts
2 Ohms: 500 Watts
Used 1 Ohm: 1000 Watts

Xterminator 2000X:
REM X GND 12V
Pos
12V
Pos GND X AUX
4 Ohms: 500 Watts
2 Ohms: 1000 Watts

Left Left GND 12V 12V GND Right Right

Neg Pos Pos Pos Neg Pos

LEFT RIGHT
SPEAKER(S) SPEAKER(S)
Vehicle Vehicle
Positive Ground Ground Positive

Negative 2000X Bridged USA-2000 Bridged Negative

8 Ohms: 1000 Watts 4 Ohms: 1000 Watts
4 Ohms: 2000 Watts 2 Ohms: 2000 Watts

Bridged Mono Total Bridged Output

USA-2000: 1000 Watts @ 4 Ohms
REM X GND 12V
Pos
12V
Pos GND X AUX 2000 Watts @ 2 Ohms
2000X: 1000 Watts @ 8 Ohms
2000 Watts @ 4 Ohms
Left Left GND 12V 12V GND Right Right
Neg Pos Pos Pos Neg Pos

Positive

Negative

Bridged Operation: Right Positive (+), Left Negative (-) BRIDGED

SPEAKER(S)

16
 4300X
Four Channel
System Amplifier
Controls and Features
The 4300X features a selectable two-way electronic crossover with independent front and rear mid-high
frequency adjustment, two ohm per channel stability, and a Remote Bass Gain control that can be
mounted in the vehicle passenger compartment. Power is provided by four 75 watt channels that can be
bridged as front and rear pairs into a 4 ohm load for a total of 200 watts per bridged pair.

front high rear low 4 ch switch 4 ch

low one full
4-IN-2 Switch:
4 channel high pass
REAR FRONT INPUT
Bass
Freq
Rear
Freq
Front
Freq
Rear
Gain
Front
Gain
4-in-2 This switch allows
one
the 4300X to
50 50
500
50
500 500
Min Min
Max
accept either
Power
single or dual
inputs, which
USA-4300
Four Channel Amplifier provides front to-
Made In Florida, U.S. A.
rear fading if the
source unit is so
e q u i p p e d .
Remote Bass Gain: Independent
The 4300x comes with an optional “Remote Bass Gain” or f r e q u e n c y
“RBG” that can be mounted in the passenger compartment controls adjust
to independently attenuate the low pass output. The “BASS the “roll-off” of the
GAIN” located on the terminal end plate of the unit is used high and low
both to set the level of the low pass output and control the frequencies from
range of the RBG. It does not matter which way the RBG 50Hz to 500Hz at
cable is connected. Use a common screwdriver tip or 24 dB per Octave.
something like it to tighten the RBG knob.

Crossover Settings:
The two-way crossover of the 4300X can be enabled to perform four separate functions by using the
configuration switches on the amplifier end plate:

front high rear low 4 ch switch 4 ch front high rear low 4 ch switch 4 ch
4 channel high pass low one full low one full
4 channel high pass

Gain Gain
1) 4 channels 2) 4 channels
switch
of full-range. one of low pass. switch
one
(Switch one is not in effect) (Switch one is not in effect)
front high rear low 4 ch switch 4 ch front high rear low 4 ch switch 4 ch
4 channel high pass low one full 4 channel high pass low one full

Gain Gain
3) 2 channels 4) 4 channels
switch switch
of high pass one of high pass. one
and 2 channels of low pass.

17
4300X Four Channel Operation

Source Unit

Positive 12 Volt Remote

Turn-on LEFT REAR F
SPEAKER(S) ALWAYS FUSE
AT BATTERY U
LEFT FRONT Positive S Vehicle Battery
SPEAKER (S) 60 AMPS 11 - 15 Volts DC
E
Positive Negative

Negative

POWER OUTPUT FL FL RL RL 12V

RBG REM GND
Use The Supplied RBG Cable
PER CHANNEL: Pos Neg Pos Neg Pos
4 Ohms: 75 Watts
2 Ohms: 90 Watts
FR FR RR RR RBG 12V 12V GND
Pos Neg Pos Neg Out Pos

RIGHT FRONT
SPEAKER(S)
Positive

Negative

RIGHT REAR RBG

SPEAKER(S) Non- Remote Aux 12 Volt
Polarized Bass Output
Positive Gain 500mA
Control MAX
Negative Vehicle Ground

4300X Two Channel Bridged Operation

BRIDGED OUTPUT
POWER PER CHANNEL: FL FL RL RL
Pos Neg Pos Neg
8 Ohms: 150 Watts Negative Negative
4 Ohms: 180 Watts
Positive FR FR RR RR Positive
Pos Neg Pos Neg
DO NOT OPERATE
The 4300X BRIDGED
MONO AT LESS THAN
4 OHMS PER
BRIDGED CHANNEL!
TO BRIDGE THE 4300X FOR TWO CHANNEL OPERATION USE THE
RIGHT POSITIVE AND LEFT NEGATIVE OF THE FRONT AND REAR SPEAKER PAIRS

18
 5600X
Four Channel
System Amplifier
Controls and Features
The five-channel 5600X features a selectable three-way electronic crossover with independent front and
rear mid-high frequency adjustment, dual power supplies, two ohm per channel stability, and a Remote
Bass Gain control that can be mounted in the vehicle passenger compartment. The U.S. Amps logo comes
separate in the box, so it can be mounted at the customers’ discretion.

4-IN-2 Switch:
RBG
Bass REAR FRONT INPUT
Bass
Freq
Rear
Freq
Front Gain Rear
Freq Gain
Front
Gain
4-in-2 This switch allows
the 5600X to
50 50
500
50
500 500
Min Min accept either
Max Max
single or dual
Power
inputs, which
USA-5600
Five Channel Amplifier
provides front to-
Made In Florida, U.S.A.
rear fading if the
source unit is so
e q u i p p e d .
Remote Bass Gain: Independent
The 4300x comes with an optional “Remote Bass Gain” or f r e q u e n c y
“RBG” that can be mounted in the passenger compartment controls adjust
to independently attenuate the low pass output. The “BASS the “roll-off” of the
GAIN” slot located on the end plate of the unit is used both to high and low
set the level of the low pass output and control the range of frequencies from
the RBG. It does not matter which way the RBG cable is 50Hz to 500Hz at
connected. Use a common screwdriver tip or something 24 dB per Octave.
like it to tighten the RBG knob.

Protection Two Ohm Stability

The 5600X is protected against thermal, over All five channels of the 5600X are stable to two
and under voltage and short circuit. The ohms. The power of the mid-high channels
separate power supplies of the 5600 are increase 17% from 4 to 2 ohms while the
individually protected against over-current. Subwoofer channel increases a whopping 43%!

Smart Amp
If the unit does not play Technology Amp Power @ 4 Ohms:
on bass but the mid-
highs work, or vice
versa, check the “SAT
SAT
PROTECT
75 Watts x 4
Plus 500
PROTECT” LEDs at MID-HIGH 200 Watts x 1 TOTAL WATTS
the terminal end of the
amplifier. If one or both Amp Power @ 2 Ohms:
SAT
is lit, there is a speaker PROTECT
or wiring short, or
improper speaker load
SUBWOOF
90 Watts x 4
Plus 710
in that area. LED Array 350 Watts x 1 TOTAL WATTS
19
5600X Five Channel Operation

Vehicle Battery
11 - 15 Volts DC

MID-HIGHS F Vehicle F SUBWOOFER

ALWAYS FUSE U Ground U ALWAYS FUSE
AT BATTERY S S AT BATTERY
40 AMPS E E 40 AMPS
FRONT LEFT FRONT RIGHT
SPEAKER (S) SPEAKER (S)
Source Unit
Positive

Negative

Positive

Negative

Positive 12 Volt
Remote Turn-on
SUBWOOFER
SPEAKER(S)
12V REM FL FL FR FR Sub 12V
Pos Pos Neg Pos Neg Pos Pos
Positive

GND 12V RL RL RR RR Sub GND

Out Pos Neg Pos Neg Neg
Negative
Negative

Negative
Positive

Positive

Vehicle Vehicle
Aux 12 Volt
Ground Ground
Output
500mA
MAX
REAR LEFT RIGHT REAR
SPEAKER (S) SPEAKER (S)

Terminal top view, facing

the rear of the 5600X
20
BASS T-CLASS
TM

MEKANIK
BY U.S. AMPS
EXPLAINED

U.S. Amps' “Bass Mekanik” amplifiers

incorporate a revolutionary new method of
Digital Power Processing™**, a
proprietary technology of Tripath
Technologies that provides superior
performance compared to conventional
methods of amplification.

U.S. Amps T-Class™ digital amplifiers

provide the full range high-fidelity of Class
“A” and “A-B”designs, yet maintain the
high-power digital efficiency of less
sophisticated and less capable “Class D”
amplifiers.

All “amplifiers” digital or analog, really consist of two sections, the power supply and the amplifier section.
The power supply, or the “engine” of the amplifier, is highly efficient, losing little energy in the form of heat.
The amplifier section acts as a “transmission” to convert the power supply's energy into audible sound.

It is during the analog conversion that the majority of amplifier heat and waste take place.

“Digital” amplifiers are high-speed, high-efficiency “transmissions”. They work, or “switch” at much higher
rates that analog amplifiers. Digital amplifiers allow more of the power supply's energy to the speakers with
less heat and waste.

Both T-Class™ and “Class D” are over 80% efficient as a whole, (power supply waste included), compared
to the 45 to 70% efficiency of a typical analog design.

U.S. Amps' T-Class™ Verses “Class D”

Both types function on digital principals, where they virtually “skip” the analog conversion process of “Class
A” and “A-B”. It is method and switching speed that primarily distinguishes T-Class™ from “Class D” in
performance.

“CLASS D”:

“Class-D” amplifiers are unable to equal the performance of U.S. Amps T-Class™. The fundamental
technology of “Class D” is self-limiting.

Here's Why:

“Class D” switching uses pulse-width modulation (PWM) technology. PWM switching is relatively slow, and
fixed at a switching frequency anywhere from 75KHz to 200KHz. This produces audio output quality that is
inferior to “Class A” or “A-B,” so efficiency is gained at the expense of sonic fidelity.

21
T-CLASS EXPLAINED - PART 2
TM

A basic rule of thumb of audio amplifier design dictates that the minimum circuit switching frequency is 10
times greater than the audible range. This bare minimum is necessary to keep transistor “switching noise”
out of the audible signal.

To adequately reproduce the audible range, (20Hz to 20KHz) the “Class D” PWM would have to switch at a
minimum of 200KHz, which represents the upper range (and cost) of PWM capability.

As a result,

“Class D” is generally used only in low frequency or low fidelity applications where the performance level of
PWM is acceptable.

Large speakers - such as woofers, or inaccurate speakers like the full-range single cone drivers used in
General Motors' Delco-Bose™*** systems - help to hide the audible high frequency noise of “Class D” by
virtue of their mechanical inability to reproduce high frequencies.

“Class D” is load-specific. Both “Class D” and T-Class™ amplifiers require output filters to eliminate
spurious digital “switching noise” from the output signal. The slow switching speed of “Class D”
necessitates a large, built-in, high-value output filter that acts as a passive crossover and is dependent
upon the correct speaker impedance.

Additionally, “Class D” operates at a relatively low voltage, much like a high current amplifier, and must be
used into low impedances to make power with current. This emphasis on current requires a larger output
filter that is more critical to impedance load matching.

This is why “Class D” amplifiers are specific “1 Ohm” or “1/2 Ohm”, etc. Failure to observe the exact
recommended speaker load is akin to connecting an improper speaker load to a passive crossover
network, and will result in degradation of the already limited “Class D” frequency response.

U.S. Amps T-Class™:

To be sure, “Class D” is (was) a step in the right direction. It does work, and works rather well in certain
instances. It is, however, a crude and incomplete technology when compared to T-Class™ and DPP. The
underlying technology of U.S. Amps T-Class™ does not use PWM and is not pure analog. T-Class™
incorporates cutting-edge Digital Power Processing™ (DPP*), a product of Tripath Technologies. DPP
combines the benefits of digital and analog with a completely new approach.

U.S. Amps' T-Class™ amplifiers are among the first to apply this breakthrough technology.

DPP utilizes ultra-high speed digital switching that varies with the amplitude of the incoming signal. At rest,
with no signal input, DPP switches at an incredible 1.5 MEGAHERTZ! (Wow!)

As the signal amplitude increases, the switching frequency of DPP decreases correspondingly, but never
enough to degrade sound quality. DPP maintains an average switching frequency of 600 to 800KHz while
sampling and switching audible frequencies.

This incredible sampling and switching speed gives U.S. Amps T-Class™ amplifiers their full-range
characteristics, and requires a smaller and less restrictive output filter.

22
T-CLASS EXPLAINED - PART 3
TM

T-Class™ amplifiers operate at a much higher voltage than most “Class D” designs, producing more power
into 8 and 4-ohm loads. Correspondingly, the T-Class™ output filter is much smaller than that used with
“Class D”, allowing U.S. Amps T-Class™ to operate into various loads without affecting signal quality or
frequency response in the audible range.

Typically, U.S. Amps' T-Class™ amplifiers have THD+N of less than 0.08% over the full audio bandwidth.

Additionally, U.S. Amps' T-Class™ exhibits ultra-low IHF-IM (high-frequency, inter-modulation) distortion -
less than 0.04%. Low IHF-IM reduces “listening fatigue”, even at excessive volume levels. By any
measure these superb specifications fall within the esoteric realm of audiophile performance.

U.S. Amps' T-Class™ provides power conversion efficiencies of 80% to more than 90%, equal to or better
than “Class D”.

Another amazing but predictable benefit of T-Class™ is its cool operating temperature. When used within
its designed power and load limitations, T-Class™ generates almost no heat. What little heat that is
produced is quickly absorbed by the standard-size U.S. Amps heat sink.

U.S. Amps T-Class™ is the beginning of an audio amplifier revolution. Soon the consumer will have
access to new and powerful products that will fit in confined spaces, require very little power to operate, and
produce incredible full-range digital fidelity.

Like any technology, DPP can be painted as great or terrible, depending on the facts examined, ignored, or
otherwise twisted in some marketing campaign. T-Class™ has a mediocre signal-to-noise ratio (86Db)
when compared to analog amplifiers; due to a certain amount of high frequency “noise” present in the
output content. This high-frequency “noise” is a signature of DPP technology, created by the terrific
switching speeds, and is well above the audible range.

The high frequency content of T-Class™ is extremely tiny, only about 200mv, and impacts harmlessly on
the speaker voice coils. By changing the output filter value it is possible to all but eliminate the switching
noise, but doing so would have a slightly detrimental effect on two T-Class™ benefits, the full-range digital
capability.

The Limitations of Digital Audio Amplifiers:

Like any other amplifier design, it is possible to distort, or “clip” the output of a Digital amplifier.

What few people understand is that any digital amplifier design, T-Class™ included, loses much of it's
efficiency benefits when it is used outside of it's intended operating range. When a digital amplifier
“clips” or is driven into gross distortion, it starts to act more like a conventional class “A-B” design, both
in power consumption and ugly waveforms.

A big reason that U.S. Amps' conventional class “A-B” amplifiers are successful in SPL competition
against “Class D” products is our firm commitment to power supply technology. Once you exceed the
“clean power” capability of any amplifier, it more or less lies down and lets the power supply do the
work. U.S. Amps power supplies out-work the rest. Our oversized power supplies only enhance the
capabilities of T-Class™ operation.

* “T-Class” is a Trademark of U.S. Amps Inc.

** “Digital Power Processing” is a Trademark of Tripath Technologies.
*** “Delco-Bose” is a Trademark of General Motors

23
 BASS MEKANIK Pt-35o

Positive 12 Volt Source Unit

LEFT Remote Turn-on
SPEAKER(S)

Left Negative
Positive 12 Volts to Vehicle Battery
Left Positive Min.12 Gauge

Left Left REM 12V

Pos Neg Pos

POWER PER CHANNEL:

Right Right X GND F
Pos Neg ALWAYS FUSE
PT-350 U AT BATTERY
Rated Power S 25 AMPS
@ .05% THD: E
8 Ohms: 80 Watts
4 Ohms: 150 Watts

Rated Power
@ .1% THD:
8 Ohms: 110 Watts
4 Ohms: 175 Watts

RIGHT Vehicle Battery

SPEAKER(S) 11 - 15 Volts DC

Right Positive
Negative 12 Volts to
Right Negative Vehicle Ground. Min. 12 Gauge

Switched 12 Volts out - 500ma

Vehicle Ground

8 Ohms Bridged Mono

BRIDGED
SPEAKER(S) TOTAL BRIDGED OUTPUT:
Negative PT-350: 300 Watts @ .05% THD Left Left 12V
Pos Neg REM Pos
350 Watts @ .1% THD
Positive Right Right
Pos Neg X GND Bridged
Operation:
Right Pos (+)
Left Neg (-)

24
 BASS MEKANIK Pt-8OO
AND PT-11oo
Source Unit
LEFT
SPEAKER(S)

Left Negative Note Dual Positive

Power and Ground 12 Volt
Connections Switched Remote
Left Positive 12 Volt Turn-on
Output

Left Left
Pos Neg GND 12V
Pos X REM

POWER PER CHANNEL: Right Right GND

Pos Neg
12V
Pos

PT-800
8 Ohms: 250 Watts @ .05% THD ALWAYS FUSE AT BATTERY
4 Ohms: 400 Watts @ .1% THD
Positive PT-800
PT-1100 12 Volts F 80 AMPS
8 Ohms: 375 Watts @ .05% THD to Vehicle U
4 Ohms: 550 Watts @ .1% THD Battery S PT-1100
8 Gauge E 110 AMPS
Wire

RIGHT
SPEAKER(S)

Right Positive
Vehicle Battery
11 - 15 Volts DC
Right Negative

Negative 12 Volts to
Vehicle Ground. Min. 12 Gauge

8 Ohms Bridged Mono

Vehicle Ground
BRIDGED
SPEAKER(S) TOTAL BRIDGED OUTPUT:
PT-800: 500 Watts @ .05% THD
Negative PT-1100: 750 Watts @ .05% THD
Left Left 12V
PT-800: 800 Watts @ .1% THD Pos Neg GND Pos
PT-1100: 1100 Watts @ .1% THD
Positive Right Right GND 12V
Pos Neg Pos Bridged
Operation:
Right Pos (+)
Left Neg (-)

25
Factory Service:
If you have a problem with your U.S. Amp that requires service you can either take it to the Dealer, who will
send it back to the factory, or you can return it to the factory yourself. If you choose to send it in yourself you
must first get a “Return Authorization” number from U.S. Amps that must be displayed on the outside of the
shipping carton.

U.S. Amps will not accept packages for service that do not display a valid Return Authorization number. We
don’t like the red tape any more than you do, but it’s the only way to keep things straight. There will be a
charge for service unless the unit is under warranty and accompanied by a copy of the sales receipt.
Remember to double box and insure your amp.

Limited Warranty:
U.S. Amps Inc. warrants all manufactured electronic products to be free from defects in material and
workmanship for a period not to exceed TWO YEARS from the date of purchase when installed by an
Authorized U.S. Amps Dealer.

All other units not installed by an Authorized U.S. Amps Dealer maintain a warranty not to exceed 90 days
from the original date of purchase by the original purchaser.

IMPORTANT WARRANTY NOTICE: U.S. Amps Inc. will only warrant and service product displaying valid
U.S. Amps serial numbers. WARRANTY SERVICE WILL ONLY BE PERFORMED WHEN THE UNIT IS
ACCOMPANIED BY A COPY OF THE ORIGINAL SALES RECEIPT. All product returned to U.S. Amps
Inc. for service MUST be accompanied by a Return Authorization Number, issued by U.S. Amps Inc. in
advance of shipment. The Return Authorization Number must be clearly and conspicuously displayed on
the shipping carton or U.S. Amps Inc. will refuse delivery.

Return Authorization Numbers are available by calling (352)-338-1926 between the hours of 9:00am and
5:00pm EST.

This warranty extends only to the original purchaser and is not transferable. Defective equipment must be
returned within the warranty period, freight prepaid, to the U.S. Amps Factory or an Authorized U.S. Amps
Warranty Station. U.S. Amps Inc. will pay return freight on all warranty repairs.
This warranty covers only defects in materials and workmanship of manufactured electronic products, i.e.
amplifiers and signal processors, and does not extend to batteries or other accessories bearing the U.S.
Amps name. Incidents of misuse, abuse, neglect, or unauthorized modification will not be covered within
the terms of this warranty.

U.S. Amps Inc. reserves the right to refuse warranty service under such conditions.

U.S. AMPS INC. WILL NOT BE RESPONSIBLE FOR ANY DAMAGES, WHETHER
INCIDENTAL OR CONSEQUENTIAL, RELATED TO THE USE OF THIS OR ANY OTHER
PRODUCT BEARING OR SOLD UNDER THE U.S. AMPS BRAND NAME. USE THIS
PRODUCT AT YOUR OWN RISK. IMPROPER USE OF THIS PRODUCT CAN RESULT IN
PROPERTY DAMAGE, BODILY HARM, AND OR OTHER DAMAGE. U.S. AMPS INC.
ASSUMES NO RESPONSIBILITY FOR YOUR HEALTH OR SAFETY.

Any dispute arising from this warranty, or breach thereof, must be entered in the circuit court of Alachua
County, Florida. This warranty gives you specific legal rights that may vary from state to state.

26
NEVER NEVER LAND:
NEVER USE A U.S. AMP WITH A GROUND LOOP ISOLATOR OR AN ISOLATED INPUT SIGNAL.
U.S. Amps are input-isolated at the factory and require an input ground for proper operation.

NEVER INSTALL OR MOUNT YOUR AMPLIFIER DIRECTLY TO A SPEAKER ENCLOSURE OR

ANYWHERE ELSE WHERE SEVERE VIBRATION IS PRESENT. Protect your investment. Use common
sense. Make sure the spot you choose is well-ventilated and free from dirt and moisture.

NEVER USE YOUR U.S. AMP BELOW THE RATED MINIMUM IMPEDANCE. Remember, when you
bridge your amplifier, each channel "sees" one half of the load, hence at 4 ohms bridged each channel is
operating at 2 ohms, which is the minimum impedance for XTERMINATOR models. U.S. Amps makes the
USA Series of 1 ohm stable amplifiers if you wish to bridge into 2 ohms, plus an array of "high current"
products that are purpose-designed to operate at even lower impedances. FAILURE TO OBSERVE THIS
BASIC RULE WILL RESULT IN A SENSELESS WASTE OF POWER AND PERFORMANCE, and could
damage your amplifier.

OTHER COOL STUFF

ORDER FORM
ITEM SIZE EACH
(please circle size)

U.S. Amps TEE L, XL $20.00

U.S. Amps GOLF L, XL $35.00

Rush me the following cool U.S. Amps Items.
Enclosed is my check or money order for the
amount of $________ dollars. U.S. Amps
JACKET L, XL $85.00
NAME__________________________
ADDRESS_______________________
CITY_________________ST_________ U.S. Amps HAT $15.00
ZIP___________ PH_______________
Email Address___________________
Team U.S. Amps
Send in this form with your order. VISOR STICKER $15.00
Make sure the amount on your check or U.S. Amps EMBLEM $15.00
M/O equals the GRAND TOTAL amount.

(Credit card purchases are available by GRAND TOTAL ___________

calling the factory direct @ 352-338-1926) (Includes Shipping
and Handling)

27
 OTHER COOL STUFF
Show your U.S. Amps Pride with
your choice of these genuine high quality
American-made accessories. Available
at your Authorized U.S. Amps Dealer, or you
can order factory-direct using the form
on the back of this page

Team U.S. Amps

Six Colors-Front Logo
L, XL 100% Cotton

The Ultimate Power Trip - Hand - Crafted In Florida, U. S. A.

TEAM U.S. AMPS VISOR DECAL
4 Color die-cut decal made of quality UV-resistant Material
32”L X 4.5”T Beautiful Turquoise, Grey and Green.

Embroidered
Hats and
Painted Metal
U.S. Amps Emblem
Golf Shirts
w/ Adhesive Back Too!
6.75”L X 2.5”H

Hand-Crafted In Florida, U. S. A.

U.S. Amps Inc.

We also have 7325-100 NW 13th Blvd
“Team U.S. Amps” Jackets
In Black With a 5-Color Gainesville, Florida 32653
embroidered logo (352)-338-1926 fax(352) 371-4122
Sizes L and XL
email: sales@usamps.com

Prices and specifications subject to change without notice. Copyright 2001 U.S. Amps Incorporated. All rights reserved.

28