Technical specifications PPA 1200

Power Series PPA 1200

In this documentation you will find information about:

• General features
• Microprocessor control
• Dynamic Damping Control™
• Auto Energy Control (AEC™)
ES 10 • Wiring for DDC™
• PPA 1200 connections
• Specifications

PPA 1200.

General features Dynamic Damping Control™

The PPA 1200 is a sophisticated, reliable class AB power DDC comprises special circuitry that measures the voltage
amplifier with microprocessor control for all functions. Fitted on the loudspeaker terminals by means of extra sensor
with dual power supplies, it delivers 2 x 600 W in 4 Ω or wiring. These measurements are compared with the
2 x 900 W in 2 Ω with superb sonic quality, for an unlimited amplifier's input signal and, if discrepancies are registered,
period. In bride mode, it delivers 1200 W in 8 Ω or corrections are made. This ensures that the amplifier has an
1800 W in 4 Ω RMS. almost infinite damping, resulting in an exceptionally accurate
A built-in two-way electronic 24 dB/oct. Bessel crossover sound reproduction.
can be activated to suit Bi-amping of many speaker systems.
Crossover frequency is fixed at 1 kHz, which is the optimum Auto Energy Control (AEC™)
for use with SA Compact Drivers. Other frequencies are AEC is a very sophisticated protection against clipping,
available on request. average power overload and peak power overload, designed
to maintain the full dynamic range of the program material.
Microprocessor control The microprocessor continuously measures output voltages
For total flexibility, a microprocessor is used to achieve the and currents of the amplifiers, when limits are exeeded, the
following: input gain is reduced proportionally to the amount of overload.
• Control of all functions like input levels, maximum power, Once the overloading has disappeared, the gain is
power amp on delay, input ground lift, system ground lift, automatically restored to its original value.
stand-by and bridge mode. Attack and release time depend on the type of overload and
• Display of values of all relevant internal parameters, like are selected to guarantee an inaudible operation.
output transistor temperature, average power, peak power,
maximum power, power amp on delay, DC on output and
overheating. LED indication for signal present, clip and power
limit and selected display status.
• Protection of the amplifier and loudspeakers.
• Full remote control of up to 250 PPA 1200 amplifiers
through the SAnet, by any PC, fitted with the SAnet card.
• Store and recall PC generated presets of all settings.
Presets for SA's loudspeaker systems are already stored in
memory.
• Integrated "logging" software enables rental companies to
establish exactly when amps have been used, for how long, at
what levels, etc.
• A system lock, with programmable lockcode, is added to
prevent unauthorised alteration of any setting.
Response of the AEC circuitry. "Maximum Power" is set at 200 W. At T=0 s, a
signal of 150 W is used. At t=1.5 s, the input signal is increased. The AEC
circuitry reduces the gain as to limit RMS power to 200 W. T=7,5 s the input
signal is restored to its original level.
 PPA1200011099EN

Wiring for DDC™

For absolute top quality sound reproduction, the PPA 1200 is
equipped with Dynamic Damping Control™.
The DDC™ system is based on 2 loudspeaker wires that
return from the speaker to the (SA) amplifier.
The picture on the right shows the wiring of 4-pole and 8-pole
Speakon connectors in combination with the DDC™ system.
Wiring for DDC™ usage with a 4-pole- and a 8-pole Speakon connectors.
PPA 1200 connections
1. SAnet input, XLR-4 6. Link output (channel 2), XLR
1 2 3 4
2. Input (channel 2), XLR 7. Link output (channel 1), XLR
3. Input (channel 1), XLR 8. Output (channel 2), Speakon
4. Fuses (channel 1 & channel 2) 9. Output (channel 1), Speakon
5. SAnet output, XLR-4 10. AC mains cable

5 6 7 8 9 10
PPA1200 connections.

Technical specifications
Frequency response : 10 Hz - 60 kHz, (300 W/ 8Ω , +0, - 3 dB)
Input sensitivity : +6 dBu for specified output (49 V/ 4 Ω load)
Input impedance : 20 kΩ, (each leg)
Output power (RMS / Peak) : 2 x 350 / 350 W in 8 Ω, 20 Hz - 20 kHz
2 x 600 / 700 W in 4 Ω, 20 Hz - 20 kHz
2 x 900 / 1400 W in 2 Ω, 20 Hz - 20 kHz
1200 / 1400 W in 8 Ω, bridge mode
1800 / 2800 W in 4 Ω, bridge mode
S/N ratio : > 105 dB, 20 Hz - 20 kHz
Common mode rejection ratio : > 65 dB at 1 kHz; > 55 dB at 20 kHz
Channel separation : > 90 dB at 1 kHz; > 80 dB at 20 kHz
THD (300 W / 8 Ohms) : < 0.005 % at 1 kHz; < 0,01% at 20 kHz
IMD : < 0,01 %, 300 W / 8 Ω, 20 Hz - 20 kHz
Slew rate kle : > 40 V/µs
large4020.002E
Damping factor (with DDC) : 10,000 at 1 kHz; 3,000 at 10 kHz
Housing : 19 in. rack mount, 4 HU high, 375 mm (14.8 in.) deep
Physical dimensions (h x w x d) : 176 x 483 x 375 mm (6.9 x 19.0 x 14.8 in.)
Weight : 34 kg (75 lb)

ES 10
H
backsideLocking

pin
4012.QRP2.5

W
PPA 1200.

Stage Accompany c Copyright 1999 Stage Accompany.

The information in this document is continually being developed. Whilst every effort has been made to make it as accurate as
Anodeweg 4
possible, no warranty of accuracy is made or implied by the makers. Stage Accompany shall have neither liability, nor responsibility to
1627 LJ HOORN any person or entity with respect to loss or damages in connection with or arising from the information contained in this
The Netherlands document.
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