DAPAudio MPA-4150, Product Manual

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9.
Aux 1.
Use to adjust the aux 1 input level.
10. Power LED.
Indicates that the amplifier is turned on.
11. AC Power Switch.
This is the main Power switch. Press to turn the amplifier on.
12. Chime button.
Activates the Chime circuit. If pressed in, the chime can be started by using the priority contact at the
backside (30). At the same time all inputs except input 1 will be muted.
13. Siren button.
Pressing this button will start the siren.
14. Input.
Use to adjust the input volume level for input 1-4.
15. Air entrance.
MPA Series amplifiers are cooled by dual, front-mounted fans, Cool air flows over the heat sinks
And exhausts through the rear grills, Make sure these outlets remain clear to allow unrestricted air
flow.
16. Signal LED.
The LED lights up when the output is above 200mV.
17. Ready LED.
The LED lights up when the unit is ready for use.
Backpanel
Fig. 2
18. Power amp in.
Mono RCA in. Use this input if You don’t want to use the build in mixer.
19. Preamp out.
Mono RCA out. Use this output if you don’t want to use the built in power amplifiers.
20. Aux 2 input.
Aux 2 stereo RCA input.
21. Aux 1 input.
Aux 1 stereo RCA input.
22. Combo input.
Combo input for channel 1 – 4. Accepts balanced or unbalanced inputs.
23. Input 1 priority terminal.
Bridge the 2 terminal contact with a wire to disable the input 1 voice priority/ VOX function.
24. Air cooling window
Make sure these inlets remain unobstructed to allow unrestricted air flow.
25. 100V terminal.
Connect this terminal to the + terminal of your 100V speaker(s). In case of using several speakers
make sure all speakers are wired in parallel. The total power rating of the 100V-speakers for each
channel should never exceed 150W.