8 Channel Rack Mountable Mixer


Where space is tight, this easily manageable rack-mountable 8-channel mixer with ultra low-noise mic preamp gives you flexible mixing and high/low audio control. Phantom power is available on each and every microphone input adjustable through simple DIP switches. Also included on each input channel: A variable tone control allowing accurate adjustment of high and low frequency audio, a peak indicator to help monitor incoming signal levels to avoid distorted audio, and a mute switch for immediate muting and unmuting of incoming signals. Output is sent either through a 3-pin phoenix connector or pre-fader RCA output. An additional auxiliary input via RCA jack is also available to further expand the DM481’s operation.

Balanced Main Output

Asystems' DM481 features a mono balanced output through a 3-pin euroblock connector. These can be wired to external amplifiers or to any other audio device with line-level inputs.

Low-noise preamplifiers

This amazing rack-mountable 8-channel mixer offers phenomenally low-noise pre-amplifiers for use with microphones.

RCA input and output

The DM481 includes a versatile RCA input connection for direct injection of external signals. In addition to this, the unit has a versatile RCA output. These connectors are ideal for linking multiple DM481 units.

Individual phantom power

Each of the DM481’s euroblock connectors can have phantom power applied to them for use with condenser microphones.

  • 8 mic/line inputs through 3-pin euroblock and 1/4” phone jack connectors
  • Ultra low-noise preamp circuitry offering up to 62 dB gain (Mic In)
  • Mute control, clip indicator and tone control on each channel
  • Pre-fader out and aux in for connecting additional units to maximize flexibility
  • Individual +48V phantom power on every channel
  • Unbalanced 3-pin euroblock master output connector
  • Built-in power supply (no bulky power adapter)
  • Incredible 1-unit space-saving design
Front Panel

The front panel controls of the DM481 include level controls for each of the individual input channels as well as a master level control. Each channel also features an adjustable tone control and mute button. A peak LED is also included on each channel to help monitor excessive signals. And, as per usual, the front panel features a nifty little power switch.

Rear Panel

Total Channels 8
Mic Input / Line Input 8 x 3-pin Euroblock & 8 x 1/4” TS
Aux Bus In RCA
Main Out 3-pin Euroblock (unbalanced)
Pre-Fader RCA
THD (Any output, 1kHz @ + 14 dBu, 20Hz to 20 KHz) 0.01%
Channel Clip Indicator +6dBu
Phantom Power Supply +48V DC
Phantom Switches DIP
Frequency Response (Mic input to any output)
20Hz to 20KHz +0/ -1 dB
20Hz to 60KHz +0/ -3 dB
S/N ratio, ref to +4 106 dB
Microphone Preamp E.I.N (150 ohm terminated, max gain) <-129.5 dB
CMRR (1 KHz @ -60 dBu, Gain at maximum) 80 dB
Maximum Level
Mic Preamp Input +10 dBu
All Other Input +22 dBu
Main Output +28 dBu
Mic Preamp Input 1.4 K ohms
Unbalanced Line in 12 K ohms
Aux Bus In 10 K ohms
Main Output 100 ohms
Pre-Fader Out 100 ohms
Power Requirement (depends on region) 100-120VAC, 220-240VAC 50/60Hz
Dimensions (WxHxD) 483 x 44 x 165 mm (19″ x 1.73″ x 6.49″)
Net Weight 3.2kg (7.1 lbs)

User’s Manual (English / Español): um_DM481_en_es.pdf
Manuel d’utilisation (Français): um_DM481_fr.pdf
Data Sheet (English): ds_DM481_en.pdf