MA1240a Multi-Zone 12 Channel Amplifier

Stable Class AB design delivers superior audiophile soun

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The Dayton Audio MA1240a is a freestanding, twelve channel amplifier designed for custom multi-room sound distribution. Its intelligently engineered and versatile design integrates easily into high-end whole house audio systems.



The Dayton Audio MA1240a features a Class-AB output circuit that delivers superior audiophile sound quality and stable performance. Each of your installation's zones can benefit from the MA1240a's clean audio reproduction and exceptional functionality. The MA1240a can be stacked with other audio components and includes removable ears for mounting in standard audio racks (2RU).


Two common or BUS inputs feed audio signals from standard line-level audio sources to any or all channels. Each of the twelve channels has its own dedicated input and independent level adjustment to provide further flexibility. By simply flipping a single switch, two channels can be bridged to increase the total power output for that zone. This is helpful when extra power is needed in certain areas.


The MA1240a's manual, automatic on/off, or triggered 12V input turn-on modes facilitate easy integration into automated systems. For quick and easy troubleshooting of the system, each pair of channels or zones has a bi-color LED to indicate its operational status.


*NOTE: See setup addendum when using in-wall volume controls. You can find this resource under 'Product Manuals' listed above.








• Stable Class AB design delivers superior audiophile sound quality and performance
• Independent and bus inputs provides unparalleled flexibility
• Bridgeable channel outputs provide additional power when needed
• Independent channel gain controls allow the output of each speaker to be perfectly matched
• Multi-stage protection circuitry for reliability and easy troubleshooting of audio system
• Temperature controlled cooling fans
• ENERGY STAR and CE EuP directive compliant, consumes less than 1/2 a watt in standby


Model Number MA1240a
Color Black
Unit of Measure Each
UPC 844632081095
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Height 4"
Product Width 16.7"
Product Length --
Product Depth 14-1/4"
Product Shipping Weight (lbs.) 38.0000
Amplifier Type Multi-Zone Amplifiers
Power Output 40 Watts per channel RMS at 8 ohms
80 Watts per channel RMS at 8 ohms (Bridged)
Power Output (RMS @ 70V) Range --
Output Channels 14
Output Connectors Phoenix, RCA
Output Types 4 ohms, 8 ohms
Inputs 14
Input Connectors RCA
Input Impedance 18K ohm
Signal-to-Noise Ratio 105 dB A-weighted
THD @ Rated Power .005% THD 20 Hz-20 kHz @ 30W (8 ohm)
.010% THD 20 Hz-20 kHz @ 80W (8 ohm) (Bridged)
Parametric EQ --
Phase Adjustment --
Low-pass Crossover --
Low Pass Adjustment --
Dynamic Range --
Frequency Response 5 Hz to 72 kHz
Efficiency 63%
Gain --
Bass Boost --
Voltage Requirement 115/230 VAC, 60/50 Hz
Auto-on Sensitivity 13.7mV
Stand-by Power Rating 115V, 0.264W
Special Features Multi-stage protection circuitry
Rack mountable
Independent channel gain controls
12 channels(6 stereo zones)
Individual channel inputs (plus BUS 1 & 2)


SKU 844632081095
Model # MA1240A
Barcode # 844632081095
Brand Dayton Audio
Shipping Weight 17.7000kg
Shipping Width 0.514m
Shipping Height 0.254m
Shipping Length 0.572m
Shipping Cubic 0.074664000m3
Assembled Length 0.572m
Assembled Height 0.254m
Assembled Width 0.514m

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