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The Atlas Sound FM250-70 amplifier module can provide up to 250 watts of power for your 70-volt distributed power speaker system, playing music and speech clearly and loudly enough for all to hear. Each FM250-70 fits into one of the six amplifier card slots of the F6-MF mainframe chassis, connecting internally to the master unit's power supply and inputs.
A Dip switch lets you set the amp's input sensitivity, to maximize the signal over background noise, and engage a high-pass filter, to clear any low rumble out of the mix. Rear-panel status LEDs let you know how the amp's behaving.
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Overview: The Atlas FM250-70 is an amplifier module is designed to work specifically with the Atlas F6-MF power rack, which can hold up to 6 modules. The FM250-70 module can output 250 watts for 70 volt speakers and features a defeatable Limiter and a High-Pass Filter. It's Class-D amp technology is designed to be 90% efficient, allowing the amp to run cooler and consume less energy than conventional amplifiers.
Installation: The FM250-70 module includes a multi-terminal strip on the rear of the PC board that lines up with a contact slot on the F6-MF power rack. The card is then secured in place with 2 front panel screws. Signal input to the card is through the rack, which has six 3-pin Euroblock connectors on the back of it, along with Level dials for each channel. The front of the module includes a 2-pin Euroblock connector for connecting 70 volt speakers. If powering 4Ω or 8Ω speakers, the FM250-4 module can be used. This installs into the F6-MF power rack in the same manner and provides the same power output for running 4/8 ohm speakers.
Settings: The FM250-70 module includes a 3-setting DIP switch on the rear of the module which includes:
Status Indicators: The front of the module includes 4 Status LEDs for the following:
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