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Cable Type
Composite / RCA Cable
Connector Type
RCA Connectors
Infrared (Standard Consumer Electronics)
Auxiliary Audio RCA Input
Expandable Zone Capacity
LED Feedback
Remote Controlled
# of Channels
12 Channels
Initial Zone Capacity
6 Zones Included
Maximum Power Handling
1090 Watts
Ease of Installation
Advanced (Installs > 60 minutes)
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Power a Whole-Home Audio System by Delivering up to 35 Watts of Power Each to 12 Individual Speakers
12-Channel, 6-Zone Power Amplifier with IR Control
Xantech PA1235 12-Channel, 6-Zone Power Amplifier with IR Control
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Sample Wiring Diagram 1 Sample Wiring Diagram 2 Rear Panel Connections
Xantech PA1235 12-Channel, 6-Zone Power Amplifier with IR Control
Item# 81276
Price: Normally $2150.00 
Hot Deal $1039.92
Free shipping on orders over $175 - See Details


  • 12 internal individual amplifiers can power up to 6 audio zones, 12 speakers
  • Internal amplifiers can be driven individually or bridged to suit almost any application
  • Use a single source for all zones or a different audio source on each zone
  • Volume on individual zones or all zones can be controlled via infrared (IR)
  • LED status indicators on the front panel of the amplifier

Essential Info

The most essential component of any whole-home audio system is the amplifier. This 12 channel amplifier will provide enough power for large applications with control of up to six different zones (pairs of speakers). Each channel (speaker) is powered by a 35 Watt amplified output, enough to deliver for a full spectrum sound experience. However, this versatile device also allows for the internal amplifiers to be bridged, creating greater audio output for specific channels. A single source (TV, iPod, MP3 player, CD player, turntable) can be connected to the "Common Bus" so that each zone has the same audio output. Alternatively, the amplifier is flexible enough to let each zone be fed audio individually via a "Local Inputs" from differing zones or sources; this means you can have audio from your TV on in the home theater, music from your iPod or MP3 player on throughout the house, and sound from your CD player on in the backyard. Volume control can be set manually on the amplifier for the entire system or for each zone individually. Another option is to install a volume control between the amplifier and your speakers. For advanced setups, the amplifier features built-in in infrared (IR) control capability, letting you use an IR System to remotely control volume from each zone. It also features LED status indicators that will let you know which zone or zones are active at all times; you can conserve energy by turning off zones that don't need to be active. The 12-Channel, 6-Zone Power Amplifier with IR Control is perfect as a shelf top or rack-mount component, and provides a great foundation for audio distribution and control throughout any home or office. Speakers, volume controls and IR systems sold separately.


What's Included

  • 12-Channel, 6-Zone Power Amplifier with IR Control
  • Owner's Manual
  • More Info

    12-11-10-9-8-7-6 Output Flexibility
    Each of the 12 amplifiers can be driven singly or bridged to allow several channel and power output capabilities. This gives the 12-Channel, 6-Zone Power Amplifier with IR Control great flexibility for use in many applications, such as driving surround sound speaker systems in addition to multi-room speaker systems. It can be configured into seven power packages as follows:
  • Twelve 35-watt amplifiers - 12 total
  • One 150 and ten 35-watt amplifiers - 11 total
  • Two 150 and eight 35-watt amplifiers - 10 total
  • Three 150 and six 35-watt amplifiers - 9 total
  • Four 150 and four 35-watt amplifiers - 8 total
  • Five 150 and two 35-watt amplifiers - 7 total
  • Six 150-Watt amplifiers - 6 total

    Status LED Indicators
    These indicators, one for each channel pair, provide the following status information:
  • They show Power ON/OFF and Standby ON/OFF conditions.
  • They flash Amber 5 times during power up, then turn steady Green when Power On Mute releases.
  • On power down, they flash Amber once, then go off.
  • This action occurs whether the unit is powered ON and OFF by the POWER switch or by a DC voltage applied to the REMOTE MASTER ON/OFF CONTROL terminals
  • They will go Off when the Standby OFF IR command is received. Sending a MUTE OFF command will restore operation. Also, LEDs blink with Volume action.
  • A Mute command will cause them to blink Green (Red if Volume is within 5 dB of Max-V). Mute is released when any other PA1235 command is sent.
  • Changing an IR Code Group will cause them to blink Amber, confirming the change has taken effect.
  • When the volume level is increased to a range within 5 dB of MAX-V, the LED color changes from Green to Red. NOTE Red indicates that volume is approaching maximum , not an indication of power output level.

    Individual ON/OFF of Amp Pairs
    Permits Standby ON/OFF control of individual channel pairs. Specifically, it permits the STATUS outputs (12 Volts On/Off) of Xantech ZPR68 zones to switch the Standby of the PA1235 channel pairs (CI) On and Off with zone ON and OFF commands.

    Volume Setting Capabilities
    Once installed, you have the option of using the volume control of the amplifier as the sole volume control for a zone or the whole system. The volume control can also be used to adjust the amplifier volume to a desired fixed level and use the volume action of a connected preamp instead. Additionally, a maximum volume setting can be established, which allows the amplifier to be set to deliver a controlled maximum sound level into a zone when the volume is ramped to maximum. This acts as a volume limiter for the system (e.g. to prevent the kids from over-driving wall speakers, etc.).

    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.

    Local or Common Bus
    Each stereo pair can be fed audio individually via their LOCAL inputs from differing zones or sources. In addition, a single source can be fed, via the COMMON Bus, to some or all stereo pairs as desired. This flexibility permits the installer to drive as many as six rooms in stereo as a single zone system, or six rooms in stereo as a six zone system, or divide them up for a combination of both.

    In STEREO mode, the two amplifiers operate independently of each other for 35 Watts of output each, except IR control of Volume, Max-V, Mute, Standby OFF/ON and Balance functions is common to both. In MONO mode, left and right input signals are summed internally for Mono output from each of the two amplifiers. Also, either the Left or Right input may be used if the source is already a Mono signal. In BRIDGED mode, the two amplifiers are bridged for a single channel of high power output (150 Watts @ 8 Ohms). Either the Left or Right input may be used to drive the resultant single channel amplifier.

    Speaker Terminals
    These plug-in 4-terminal screw type connectors permit speaker wire sizes up to 12 gauge.

    IR System
    Since the 12-Channel, 6-Zone Power Amplifier has an IR control system for each amplifier pair, it can be configured so that each individual room, in a multi-room system, can have Line Level Volume, Mute, Balance, and Standby ON/OFF action via IR or Smart Pad control. This eliminates the need for speaker level volume controls and their attendant power losses and reduced sound quality. A basic Common IR Bus system using a low cost approach requires that a dedicated remote be used in each room that has an IR receiver; that is, remote commands for Volume, etc., are specific for each room. A basic Dedicated IR System can be setup so that each remote room has a Dedicated IR path going to the amplifier pair that controls it. The IR bus is not connected in common, it eliminates the need for dedicated remotes, allowing you to carry the same remote(s) from room-to-room; that is, remote commands for Volume, Mute, etc., will work in any room from the same remote.

  • Specifications


    Manufacturer Product No.:PA1235
    Number of Channels:12
    Video Interface:VGA or DVI-I
    Power Rating:Rated Continuous Power: 8 Ohms and 35 Watts (per channel), all channels simultaneously driven, 20 Hz to 20 kHz, at rated THD
    Short Term Continuous Power: 8 Ohms and 55 Watts or 4 Ohms and 80 Watts (each channel), 2 channels driven, 1 kHz at rated THD
    Bridged Power Output: 8 Ohms and 150 Watts, short term continuous, one pair driven, 1 kHz, at rated THD
    Rated THD<0.08%
    Dampening Factor:>100 at 50 Hz,1/2 rated power
    S/N Ratio:>100 dB
    Frequency Response:12 Hz to 55 kHz at 1 Watt +/- 3 dB
    Input Sensitivity: Input Gain (IR Controlled Setting): 0.5 V maximum, 1.0 V default, Off minimum; at rated power, stereo mode
    Input Impedance:LOCAL Inputs: 22 kOhms
    COMMON AUDIO BUS Inputs: 70 kOhms
    Power Source:120 VAC, 60 Hz (240 V Version: 240 VAC, 50 Hz)
    Power Consumption:No Signal: 30 Watts (0.25/0.13 A)
    12 channel at 1/10 rated power: 360 Watts (3.0/1.5 A)
    12 channel at rated power: 1090 Watts (9.1/4.6 A)
    6 channel Bridged at 8.5 watts/channel: 720 Watts (6.0/3.0 A)
    Remote ON/OFF and CI Voltage/Current:+5 V to +30 VDC (16 mA at +12 VDC)
    Default IR Code Group (all amplifier pairs):A0
    Line Fuse Rating:10 A Slow Blow
    Dimensions:19" W x 5-1/4" H x 15.5" D (483mm W x 133mm H x 394mm)
    Weight:35.75 lbs (16.3kg)

    Important notes:
    Only defective exchanges for identical item within Manufacturer’s warranty period. No other returns allowed on this item. For defective returns after 30 days, please contact the manufacturer.
    Manufacturer contact information: Xantech LLC, Tel: (800) 843-5465 Ext 355


    Sample Wiring Diagram 1  Sample Wiring Diagram 2  Rear Panel Connections   
    Sample Wiring Diagram 1  Sample Wiring Diagram 2  Rear Panel Connections   



    Speakers  Speaker Wire  Volume Controls   
    Speakers  Speaker Wire  Volume Controls   

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