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Originally Posted by boomy3555 /img/forum/go_quote.gif
I'd keep them audibly balanced, Rt = Lt, by using the individual volume controls on each amp. but I assume you mean something different when you define balanced. I'm somewhat ignorant when it comes to the topology of amps. I just saw a logical chain of gear and thought that seperating the Rt and Lt and channeling them through seperate amps might make a more balance flow. Similar to the dual amp basis of the Grado RA1 but without a common ground.
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Okay, I think I know what you're getting at.
The purpose of balanced audio amplification is to produce amplification while reducing noise. A "balanced" amp usually does this by creating an inverted (differential) signal, which allows subtraction of any noise that has been introduced along the amplification pathway. Obviously, you aren't able to do this with your configuration, since all of the hardware you're working with is single-ended (unbalanced.)
By separating the audio channels into 2 different amps, I think you're suggesting that you would benefit from noise reduction due to less cross-talk / EM interference between the left and right channels. I think that is probably true, but at the same time, you would be introducing more noise due to the increased space that your signals are exposed to.
With regard to "balancing" the left and right channels, meaning keeping them at the same amplification level, you might be able to approximate that by ear or even better by using an oscilloscope, but the problem is that there is always going to be some drift in impedance, especially with tubes, which vary in their characteristics based on the temperature.
In any case, this is all theory, and in practice, it might work. So give it a shot and let us know how it works!
