Re: AMT WarmStone "Tubes"
They should mimic the amplification characteristics of real tubes, ss just doesn't need 300V to do it. Tubes are quite inefficient, but that's part of why they sound like they do. But yes, even ss needs a reference voltage, it's just much lower.
I'm guessing they have designed the circuit to use whatever is on the heater circuit, 12VAC or 12VDC, easy enough to do.
FWIW, I got some of the Jet City Retrovalves last night and got to try them for a few minutes in my AMT preamp, they sounded good, I need to spend some more time with them before I give more details other that they seem voiced a little darker than the tubes I had in it, but that's probably by design.
They should mimic the amplification characteristics of real tubes, ss just doesn't need 300V to do it. Tubes are quite inefficient, but that's part of why they sound like they do. But yes, even ss needs a reference voltage, it's just much lower.
I'm guessing they have designed the circuit to use whatever is on the heater circuit, 12VAC or 12VDC, easy enough to do.
FWIW, I got some of the Jet City Retrovalves last night and got to try them for a few minutes in my AMT preamp, they sounded good, I need to spend some more time with them before I give more details other that they seem voiced a little darker than the tubes I had in it, but that's probably by design.
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