![]() Raising the line voltage 10 volts could easily raise the amp’s internal high-voltage (B+) 40 volts or more. There are, of course, various rumors that a certain guitarist achieved his famous “Brown Sound” using this device, with some alluding that the voltage was raised and others stating that the voltage was lowered.Įither direction can have a substantial effect, but raising the voltage, in my opinion, is the far more frowned upon option and can be detrimental to the health and well-being of the amplifier. Connecting this to a standard tube guitar amplifier and varying the AC voltage can definitely change the tone and response of the amp. First, for those who are unfamiliar, a Variac is a device that can be used to raise or lower the line voltage to any device. You pose an interesting question here – I think we’ll emerge with an equally interesting result. Regarding the Variac and attenuator combo, would I be able to use both of them at the same time so this signal could be sent to the effects processor? My main concern is the rackmount preamp, which I believe has a high voltage toroidal transformer. If I connect the power supply from my preamp and amp to a Variac transformer, will I be able to get the brown sound? Would this harm either one in any way? I would then plug this signal into a Koch Load Box II attenuator. I want to experiment with them, but my main distortion comes from a rackmounted Rocktron Piranha preamp with 12AX7 tubes and several older, heavily-modified Traynor amplifiers that use 12AT7 tubes on the input stage – mostly 25-50 watters. ![]() I have a question about Variac transformers. ![]()
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