Installation Notes

23. binding post for the connection of an additional loudspeaker

This binding post is meant for the connection of a small external loudspeaker that gets driven by an internal auxiliary power amplifier, providing a nominal output of 1 watt. Only the mixed audio signal coming from the “IN 4" and the ”AUX IN" are included in the outputted signal. And hence to this fact, the volume is only controlled by the input controls of these two channels.

24. binding post “0 dB”

At this terminal the unbalanced mixed audio signal coming from the inputs “IN 4" and ”AUX IN" is outputted with a nominal level of 0 dB, which can be used to drive an external device that provides a higher input impedance than 600 ohms (e. g. an additional amplifier, the main telephone or intercom switchboard, etc.). The volume of the outputted signal is only controlled by the input controls of the “IN 4" and the ”AUX IN".

25. binding post “VOICE PRIORITY”

When short-circuiting this terminal with the “COM”-terminal (i. e. by means of using an electrical switch), the audio signals coming from “IN 4" and ”AUX IN" are attenuated while the signals coming from “IN 1", ”IN 2" and “IN 3" are gaining priority.

26. binding post “COM”

The common terminal for the outputs (25), (26) and (28).

27. binding post “PRE OUT”

This terminal outputs the mixed audio signals of all sources that are connected to the amplifier’s inputs and can be utilized to feed an external power amplifier, a signal processor (e. g. an equalizer), or any other external appliance. The unbalanced signal is affected by the individual input controls, the sound balance controls, and the master volume control. Before using the PRE OUT you have to remove the bridging-strip between this binding post and the “MAIN IN” terminal (28).

28. binding post “MAIN IN”

After removing the bridging-strip between the “PRE OUT” and the “MAIN IN” terminals you can include an external signal processor (e. g. an equalizer) in the audio-chain between the pre-amplifier and the power output stage of the power amplifier. This opportunity provides a proper solution whenever shaping or improving the audio signal is necessary (adjusting delay times, equalizing, eliminating the Larsen-effect, etc.). The input is unbalanced.

29. “GND” screw

In case the used mains outlet does not provide a ground conductor, this screw offers the possibility to ground the amplifiers metal parts. Nevertheless, you should leave this procedure to the experienced, qualified electrician.

At all times, the amplifier has to be operated under appropriate environmental conditions. This includes that the operation location provides sufficient ventilation and that the device is not exposed to direct sunlight or the direct radiation or reflection from any heat source.

Installing the loudspeaker systems choose a location that gets not affected by extreme and/or constant vibrations or other mechanical oscillation. Also make sure that the speakers are installed at locations that are free from dust and/or moisture.

MIXER AMPLIFIER, MV 503, MV 512, MV 506 specifications

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