DMA-1240 High Efficiency Multi-Channel Amplifier
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Designed like a tank to handle the constant demands of whole-house audio, the DMA-1240 has proven itself in residential and commercial environments alike including offices, amusement parks, and even museums.
The DMA-1240 includes 12 digital amplifier channels for efficiently powering all of the speakers throughout your home. It is ideal for providing independent power of up to 120 watts per zone into 6 stereo zones. Combine with an HTD whole-house audio controller and digital keypads for mid-level and advanced multi-room audio control.
SKU: DMA-1240
Features
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
Specifications
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:
| HTD DMA-1240 | Niles SI-1230 | Sonance Sonamp 1230 | |
| Retail Price | $699 | $1,199 | $1,249 |
| Channels of Amplification | 12 | 12 | 12 |
| RMS watts per channel, all channels driven | |||
| 8 ohms | 40 | 30 | 30 |
| 4 ohms | 60 | 42 | 45 |
| Adjacent Channels Bridged 8 ohms | 120 | 80 | 100 |
| Total Harmonic Distortion (THD) 20 Hz - 20 kHz | |||
| 8 ohms | 0.04% | 0.04% | 0.03% |
| 4 ohms | 0.07% | 0.06% | 0.10% |
| Adjacent Channels Bridged 8 ohms | 0.09% | 0.06% | not available |
| Number of stereo inputs available to all channels | 2 | 1 | 1 |
| Number of stereo outputs | 2 | 1 | 1 |
| Independent input for each channel | Yes | Yes | Yes |
| Each channel can play left, right, left+right (mono), or independent input | Yes | Yes | Yes |
| Gold plated 5-way binding post speaker terminals | Yes | Yes | Yes |
| Gold plated line level input and output terminals | Yes | No (nickel plated) | No (nickel plated) |
| Independent level control for each channel | Yes | Yes | Yes |
| Turn-on modes (music sensor, voltage trigger, manual) | Yes | Yes | Yes |
| 12-volt control output for system expansion | Yes | Yes | Yes |
| Built-in impedance protection/ number of light indicators | Yes/6 | Yes/1 | Yes/6 |
| Dimensions (HxWxD) | 4" x 17" x 15.75" | 5.5" x 17" x 15" | 5.5" x 16.8" x 14.3" |
| Net Weight | 29 lbs | 28 lbs | 38 lbs |