The PA435X was designed to meet the audio power amplifier needs of custom installed multi-zoned systems with high sonic quality. It is a 4 Channel amplifier that is primarily intended to interface with the MRC88 Whole-house Audio Video Entertainment System for Zones 7 and 8 Preamp outputs or for Sub-Zone amplification of zones 1-6. It may also be used as a standalone single or 2-zone amplifier.
The PA435X features four 35-watt power amplifiers. This permits each PA435X to drive 2-zones in a multi-zone system - each with a 35-watt stereo amplifier per zone.
4-3-2 Output Flexibility. Either pair of amplifiers can be bridged to allow several channel and power output
capabilities. It can be configured into three power packages as follows:
- Four 35-watt amplifiers. (4 Mono speaker outputs or 2 Stereo Zone outputs)
- One 70 and two 35-watt amplifiers. (1 Mono 70 Watt and 1 Stereo 35-watt output)
- Two 70-watt amplifiers (single Zone Stereo 70-watt output)
Remote ON/OFF Control Jacks (C1 & C2). These 3.5mm Stereo Mini Jacks allow the PA435X to be powered on
and off and muted by a positive DC voltage ranging between 4 and 30 volts (11mA @ 12 V). Specifically, when
interfaced with the Control Out jacks of zones 7 & 8 on the MRC88 (labeled CO1 and CO2), it permits the MRC88 to
power the PA435X ON and OFF automatically with zone ON/OFF commands.
Input Level Flexibility. The input levels are individually adjustable (per stereo pair) from a low of 0.2 volts up to 3 volts. This gives the installer the ability to adjust the overall gain of the system or zone. For instance, there may be a need to adjust the amplifier to deliver a controlled, maximum sound level into a zone when the volume control on the preamp is set to maximum. This would act as a volume limiter for any particular zone (i.e. to prevent the kids from over-driving wall speakers, etc.). When set to the 1:30 position, this will match the sensitivity level of the standard Amplifier output setting of the MRC88.
Low Impedance Capability. Each amplifier is 4-Ohm safe under music conditions in stereo mode and 8-Ohm safe when bridged. This means, for instance, that you can drive two pairs of 8-Ohm speakers in stereo mode in each zone with ease.