I have had a pair of Acoustat Spectra 3's for about 2 years now. They are in original condition. I have noticed that one speaker is slightly louder than the other, like 2 dB. I checked the grid voltage, and the quiet one reads 4500volts, and the loud one reads 6500volts. Is there a way to 'adjust the bias' to make them the same? Reading was taken off Red wire 5kv, (see schematic)
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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