My tech says it makes a difference that would be noticed in non master amps ran at high volume, that typically work the phase inverter hard. He also told me that you wouldn't benefit as much from a balanced phase inverter in a modern amp that draws most of it's gain and distortion from the preamp as they don't work the phase inverter very hard.
How important is it to used a balanced tube for the phase inverter?
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My tech says it makes a difference that would be noticed in non master amps ran at high volume, that typically work the phase inverter hard. He also told me that you wouldn't benefit as much from a balanced phase inverter in a modern amp that draws most of it's gain and distortion from the preamp as they don't work the phase inverter very hard.