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Joined: Sep 2005
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Joined: Sep 2005
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25 volt is normal for school intercom partly because of the low voltage requirements as Jeff said and also because they don't need much power to each speaker. 1/4-1/2 watt is normal
The muffled could be either the amp is overloaded or an impedance mismatch on the input. You can run both a regular amp and self powered from the same source but you need to isolate both conductors of the signal from each other system so not to have bleed over.
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