CONNECTION OF SUBWOOFERS CONNECTION OF SUBWOOFERS IN

TO DLS MONO AMPS BRIDGE MODE TO DLS STEREO AMPS

Amplifier speaker terminal
both the + and - terminals are internally connected in parrallel.

Amplifier speaker terminal Amplifier speaker terminal Amplifier speaker terminal

On DLS mono amplifiers, with doubled speaker connectors,

- - + + - - + + L+ L- R+ R- L+ L- R+ R-

- + - + + - - +
4Ω 4Ω 4Ω 4Ω

4Ω 4Ω
- + - +
Connection of a subwoofer Single voice coil subwoofer
Connection of a subwoofer Dual voice coil subwoofer
with 4 ohm single voice coil connected in bridge mode.
with 4 ohm dual voice coils connected in parallel in bridge
Impedance = 4 ohm Impedance = 4 ohm
Impedance = 2 ohm Amplifier load = 2 ohm mode.
Impedance = 2 ohm
Amplifier speaker terminal Amplifier speaker terminal Amplifier speaker terminal Amplifier load = 1 ohm
- - + + - - + + L+ L- R+ R-
Amplifier speaker terminal
L+ L- R+ R-

- + - + + -
4Ω 4Ω 4Ω
+ -
4Ω
4Ω
- +
4Ω
- + - + + - + -
4Ω 4Ω 4Ω
+ -
4Ω 4Ω
- +
Connection of two subwoofers
with 4 ohm single voice coil Connection of two subwoofers Single voice coil subwoofer
Impedance = 2 ohm with 4 ohm dual voice coils connected in bridge mode. 4Ω
Impedance = 1 ohm Impedance = 2 ohm + -
Amplifier speaker terminal Amplifier load = 1 ohm (only for
- - + + Amplifier speaker terminal DLS A-series amplifiers) Connection of two subwoofers
- - + + with 4 ohm dual voice coils in
Amplifier speaker terminal parallel and then in series to the
L+ L- R+ R- amplifier gives a resulting
- + impedance of 4 ohm.
Amplifier load = 2 ohm
4Ω - +
4Ω Amplifier speaker terminal
+ - L+ L- R+ R-
4Ω
- 4Ω
+ +
-
4Ω + -
4Ω
- +
4Ω + -
4Ω 4Ω
- +
+ -
4Ω 4Ω
- +
Connection of a 4 ohm dual
Connection of two subwoofers voice coil subwoofer with the
with 4 ohm dual voice coils in Connection of two subwoofers voice coils in series.
parallel and then in series to the with 4 ohm voice coils in series Impedance = 8 ohm
- + Impedance = 8 ohm Amplifier load= 4 ohm
amplifier with a resulting
4Ω impedance of 4 ohms. Amplifier load= 4 ohm

If you connect two subwoofers with

2 ohm voice coils in this way the
resulting impedance is 2 ohms.
Connection of four subwoofers
with 4 ohm single voice coil
Impedance = 1 ohm
SPEAKER LOADS CONNECTION OF SUBWOOFERS TO MONO
Most car audio speakers have an impedance of 4 ohm, but AMPLIFIERS:
2 ohm speakers and subwoofers are becoming more com- DLS mono amplifiers are available in all of DLS three
mon. Many new subwoofers also have dual 2 ohm voice amplifier lines. These amplifiers are internally designed for
coils. use with subwoofers at low impedances.
Here are many examples of how to connect subwoofers.
MONO AMPLIFIERS CAN NOT BE CONNECTED IN
CONNECTION IN STEREO MODE TO STEREO BRIDGE MODE!
AMPLIFIERS: All of the mono amplifiers have double speaker terminals
- DLS Performance (former CLASSIC) and Reference that are internally connected (+ with + and - with -). The
amplifiers can handle loads down to 2 ohm on each stereo double output terminals can not be connected in bridge
channel. mode, it is just for making it easier to connect more than
one subwoofer to the amplifier.
- DLS ULTIMATE amplifiers can handle loads down to 1
ohm on each stereo channel. - DLS Performance (former CLASSIC) mono amplifiers
CA12, CAD11 and CAD15 can handle loads down to 1 ohm
CONNECTION IN BRIDGE MODE TO A STE- (like four, 4 ohm subwoofers, connected in parallel.)
REO AMPLIFIER:
When you connect in bridge mode there is one most - DLS Reference RA10 mono amplifier can handle loads
important thing to know: down to 1 ohm.

- The impedance is halving when - DLS ULTIMATE A6 mono amplifier can handle loads down
connected in bridge mode to a stereo to 1 ohm.
amplifier.
MULTI CHANNEL AMPLIFIERS:
The speaker’s impedance is of course the same, a 4 ohm Our multi channel amplifiers have two or four stereo
speaker is always 4 ohm. It is the amplifier that perceives channels and one mono sub channel.
the 4 ohm speaker as a 2 ohm load, and a 2 ohm speaker is The mono sub channel on these amplifiers can not be
perceived as a 1 ohm load. connected in bridge mode. They are designed to be mono
channels only and are connected in the same way as the
DLS Performance (CLASSIC) and Reference stereo mono channel amplifiers above.
amplifiers can handle loads down to 4 ohm when connected
in bridge mode. The amplifier percieves this as a 2 ohm - DLS Performance (former CLASSIC) CA31, CAT31 and
load and we say that these kinds of amplifiers are 2 ohm CA51 are multi channel amplifiers that can handle loads
stable. down to 2 ohm on the mono sub channel.

DLS ULTIMATE stereo amplifiers can handle loads down - DLS Reference RA30 and RA50 are multi channel
to 2 ohm when connected in bridge mode. The amplifier amplifiers that can handle loads down to 2 ohm on the mono
perceives this as a 1 ohm load and we say that these kinds sub channel.
of amplifiers are 1 ohm stable.
- DLS ULTIMATE A5 and A7 are multi channel amplifiers
If you are using more than one speaker / subwoofer they that can handle loads down to 1 ohm on the mono sub
must be connected in a way so the impedance is still 4 ohm channel.
when connected to a Performance (CLASSIC) or
Reference amplifier in bridge mode. NOTE! Choose a location for your amplifier where air can
circulate freely around it. Do not cover the amplifier with
On the ULTIMATE amplifiers you can connect speakers in carpets or hide behind trim panels.
bridge mode with an impedance of only 2 ohms. Do not mount the amplifier in an inverted or upside down
position. Mono amplifiers will generate a lot of heat!

Two 4 ohm speakers in parallel Two 2 ohm speakers in series.

+ + + + + +

2 ohm 4 ohm

- - - - -