4 Zone Mixer


The Asystems DM434 zone mixers give you three stereo line inputs, one paging microphone input with EQ and ducking depth control, and one emergency input in a space-saving single rack unit. An emergency interface connector allows for override control and insert of emergency message paging. We’ve also added options for remote volume control of each zone and talkback microphones.

24V DC Emergency Power

The DM434 features emergency power connector and input, allowing for emergency audio to be broadcast in the event of power outage.

Microphone input for paging

The DM434 multi-zone mixer offers a phenomenal low-noise microphone pre-amp with a ducking control with adjustable threshold for paging purposes.

RCA inputs

The DM434 includes a versatile RCA input connections for direct injection of consumer-level signals.

Phantom power

The DM434’s microphone input offers +48V phantom power allowing it to be used with condenser microphones.

  • Three stereo and one mono zone outputs with independent source select switches and level controls
  • Mid and low EQ controls on microphone input
  • Three stereo RCA line inputs with individual trim controls
  • Paging microphone input and 3-pin phoenix emergency input for emergency message broadcasting
  • Microphone ducking depth and EQ controls
  • Utility output provides audio to general utility areas (foyers, restrooms, etc.)
  • Utility output source selectable
  • Stereo/Mono switch on zone 1 and 2
  • Remote level controls can be wired to the four zones for applications requiring remote adjustment of audio levels


Front Panel

The front panel controls of the DM434 include level controls for each of the individual zones as well as independent source select switches (including the utility zone). Stereo channels feature a ‘mono’ button for adjusting the zone operation. The microphone input features a treble and bass control, as well as a depth control and level control. The unit also features an emergency paging trim control with trigger LED. And, as per usual, the front panel features a nifty little power switch.

Rear Panel

Input Impedance 2kΩ
Gain -∞ to +55 dB
Frequency Response 40Hz to 20 kHz, ±0.5 dB
EIN -128 dBu
CMRR 100 dB @ Max Gain
Phantom Power +15V DC
Input Connectors Balanced XLR
Stereo BGM Input
Input Impedance 40kΩ
Gain -∞ to +20 dB
Frequency Response 40Hz to 20 kHz, ±0.5 dB
Input Connectors Unbalanced Stereo RCA
Emergency Audio
Input Impedance 14kΩ
Gain -∞ to +10 dB
Frequency Response 50Hz to 20kHz, ±0.5 dB
Input Connectors 3-pin phoenix/euroblock
Panic Override +24V DC
Input Connectors 24V DC terminal
Stereo Zone Output
Impedance 120Ω
Gain -10 to +20 dB
Frequency Response 40Hz to 20kHz, ±0.5 dB
Paging Override Depth Cut +10 dB
Output Connectors 3-pin phoenix/euroblock
Utility Output
Impedance 120Ω
Frequency Response 40Hz to 20kHz, ±0.5 dB
Gain -10 to +20 dB
Output Connectors 3-pin phoenix/euroblock
THD <0.2%
Crosstalk -75 dB @ 1 kHz between any 2 outputs
Mains Power 100 to 120VAC, 200 to 240VAC, 50/60 Hz
Size (W x H x D) 483 x 44 x 173 mm (19” x 1.73” x 6.8”)
Weight 2.5 kg (5.5 lbs)

User’s Manual (English / Español): Download
Data Sheet US (English): Download
Data Sheet EU (English): Download