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In Reply to: RE: Most recent Acoustat upgrade posted by dogwan on July 27, 2014 at 11:12:42
What is the "discrete MOV"?
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Varistor - A Metal Oxide Varistor. What is "Discrete" about it? You made a Metal Oxide Varistor out of caps/diodes and inside that little container?
MOVs are Voltage surge supressors. You see them a lot on switches and power supplies.
I VOID WARRANTIES
Perhaps I should've phrased it differently. It is a replacement for the MOV in the circuit and it is made of discrete components.
I did not make it. It was made for me by someone who has devoted a lot of time and energy into increasing the dependability and performance of the Acoustat servo amps. And, he has done his research. I trust him.
In this case the MOV's are in the signal path and as such have an effect on the sound. I can't tell you what they actually do in this position. What I can tell you is that doing the swap removed a haze on the upper frequencies that was most noticed once removed. A subtle, but cheap tweak.
MOVs are also the 'sacrificial' device in surge suppressors.
As such, they have a limited capacity to absorb abuse and should be replaced periodically. This is not a bad thing, since they are commodity cheap.
Too much is never enough
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