DMA-1240 High Efficiency Multi-Channel Amplifier

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In Stock. Ships same day M-F if ordered by 2pm Central.



More Info

Here is a quick overview of the product features- the key word is "flexibility":
  • 12 channels of full-range digital amplification (operates significantly cooler than most multi-channel amplifiers):
    45 watts RMS into 8 ohms per individual channel
    40 watts RMS into 8 ohms with all channels driven
    60 watts RMS stable into 4 ohms (two 8 ohm speakers installed in parallel creates a 4 ohm load; so four 8 ohm speakers installed in one stereo zone - two amp channels - provides a maximum 120 watts per zone)
  • Each channel is stable to 4 ohms, so you can safely connect two 8 ohm speakers to each channel for a maximum of 24 speakers; example: 6 stereo zones with up to four speakers in each zone
  • 2 side-by-side channels can be bridged to create a single 120 watt channel (8 ohms only)
  • You decide the combination of 40 watt and 120 watt channels (up to 6 channels at 120 watts each) into 8 ohm load
  • Two stereo inputs are available to every channel
  • A separate input is also available unique to each channel (for whole-house audio)
  • Each channel can independently be selected to play the left, right, or combination (mono) of Inputs 1 and 2
  • Maximum volume output for each channel can be easily adjusted from the front panel so that you can balance overall sound levels throughout your home (example- limit how loud the speakers can play in your kids' rooms)
  • All connections are gold-plated for optimum performance
  • Amplifier can be turned on and off manually or automatically as needed when an input signal, or trigger (for whole-house audio) is detected
  • Protection circuitry and signal lights make sure you don't overload each channel with too many speakers (a channel will go into protect mode if the impedance drops too low)
  • Dimensions (HxWxD):  4" x 17" x 14 1/2" not including power cable and volume knobs- Add 1" in back and front for proper clearance
  • Weight: 29 lbs
  • Top vented: allow 4" of space above and adequate air flow around amplifier
  • Power consumption: approx 5 watts in stand-by mode; 1200 watts max all channels fully driven
  • Color: Dark Charcoal Black
  • Rack-mount brackets sold separately


The DMA-1240 high efficiency digital multi-channel amplifier offers comparable or better performance, features, and build quality than products costing twice as much or more at retail. And we back it up with a 30-day guarantee and two year parts and labor warranty. Here are some more detailed specifications of the DMA-1240 along with a comparison to popular models from Niles and Sonance:

Sonamp 1230
Retail Price$699$1,199$1,249
Channels of Amplification121212
RMS watts per channel, all channels driven
     8 ohms403030
     4 ohms604245
     Adjacent Channels Bridged 8 ohms12080100
Total Harmonic Distortion (THD) 20 Hz - 20 kHz
     8 ohms0.04%0.04%0.03%
     4 ohms0.07%0.06%0.10%
     Adjacent Channels Bridged 8 ohms0.09%0.06%not available
Number of stereo inputs available to all channels211
Number of stereo outputs211
Independent input for each channelYesYesYes
Each channel can play left, right, left+right (mono),
or independent input
Gold plated 5-way binding post speaker terminalsYesYesYes
Gold plated line level input and output terminalsYesNo
(nickel plated)
(nickel plated)
Independent level control for each channelYesYesYes
Turn-on modes (music sensor, voltage trigger, manual)YesYesYes
12-volt control output for system expansionYesYesYes
Built-in impedance protection/
number of light indicators
Dimensions (HxWxD)4" x 17"
x 15.75"
5.5" x 17"
x 15"
5.5" x 16.8"
x 14.3"
Net Weight29 lbs28 lbs38 lbs