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drdna wrote:

I also use the 6SN7-2A3 DHT for my system (except subwoofer). Did you use the Electrocubes for the coupling capacitors? Was the internal wiring regular copper? The coupling capacitor is critical, of course. Also, I will say that silver wire, which many people hate: the fact is that it is a better conductor. My opinion is that the silver wire reveals a problem that is creating harshness and brightness from the OTHER parts of the system, perhaps from bad electricity as well. In my amplifier, careful choice of the coupling capacitor and using silver wire in the signal path corrected the problem of the sound being syrupy like in a dream where you are running is low motion.

I did not do anything with San-Audio SV-2A3 amp. I juts built to it original state. The parts in there are crap, including the coupling capacitor, I did not change anything, I need to order the parts to do the change but am not convinced that I will stay with 6SN7. Are you driving your 2A3 right from 6SN7 or you use the second part of 6SN7 as a direct-coupled second gain stage? I would like topologically to stay with 2 channels only as I do not need a lot of gain, quite opposite but  I might keep the 6SN7 – it is a good tube. I might even drop the cap from cathode bias in 2A3 – it shell kill all gain but it is what I might need. I do not know yet.

Can you post or explain the topology of your 6SN7-2A3?

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