I have an Electrovoice MA-1212 That when I hook it up and power on all I get is a constant low frequency Hum. Checked the wiring and speakers on another amp and eliminated them? Any suggestions?
Audio Players & Recorders - ElectroVoice - http://www.electrovoice.com/products/70.html Amplifier
Answers & Comments
WIth the speakers disconnected, measure the terminals using a DC voltmeter. I suspect that there is DC voltage there where there should be 0V. If that is the case, the output transistors are shorted and need to be replaced.
Dan