When using the MA1240a with a receiver without a trigger output, the voltage can come from a 12V wall wart (3.5mm tip-positive connector) plugged into the receiver’s switched outlet and the trigger input. When the trigger input is energized, the amp turns from standby to ON mode. The 3.5mm miniplug jack will accept a 3-30V AC/DC output from another device, or from a separate power supply. The trigger input is a handy feature when connecting the amplifier to an automated audio system. In “Auto” mode, the amplifier will take approximately 15 minutes to return from ready to standby mode. “On” setting puts the amp constantly in ready mode so that it can be controlled by the master power switch on the front panel. “Auto” setting senses a signal on the RCA line-level inputs and automatically puts the amp in ready mode. “Trigger” setting relies on 3-30V AC/DC voltage going into the trigger input to activate the amplifier. This switch selects the turn-on stimuli that will put the amplifier in ready mode. Be sure to use high quality RCA cables that feature low impedance, shielding and high quality connectors. The BUS line outputs are direct feed-through to allow the BUS inputs to be fed to other amplifiers. The MA1240a has two common or BUS inputs that receives audio signals from standard line-level audio sources and sends them to any or all channels. Note: When the power LED is red and the zone status LEDS are not lit (off), indicates the unit is in standby mode. Once the condition has been corrected for the zone in question, the status LED will return to blue. The remaining zones will continue to operate and maintain a blue LED status. If the circuitry determines that a channel must be shut down due to excessive heat or low impedance (a short), only the channels that are affected will be turned off causing the zone LED to turn red. These indicators provide quick and easy troubleshooting of the system. The master power switch will turn off the amplifier no matter which power mode has been selected.Įach pair of channels or zones has a bi-color LED to indicate its operational status. When the LED is blue, the amplifier is fully active. The remote turn on switch (located on the rear) is either in the “trigger” or “auto” position. When the switch is on and the indicator LED is red, the amplifier is in standby mode.
By simply flipping a single switch, two channels can be bridged to increase the total power output for that zone. Each of the twelve channels has its own dedicated input and independent level adjustment to provide further flexibility. Two common or BUS inputs feed audio signals from standard line-level audio sources to any or all channels. The MA1260 can be stacked with other audio components, and includes removable ears for mounting in standard audio racks (2RU).Īll of the input/output options your system could ever need An efficient Class D output stage delivers superior audiophile sound quality and performance. Its intelligently engineered and versatile design integrates easily into high-end whole house audio systems. The Dayton Audio MA1260 freestanding, 12-channel amplifier was created for custom multi-room sound distribution.
Independent channel gain controls allow the output of each speaker to be perfectly matched.Bridgeable channel outputs provide additional power when needed.Independent and bus inputs enable unparalleled flexibility.
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