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DustyC's picture
Last seen: 8 years 4 months ago
Joined: Mar 4 2009 - 11:18am
Tube Amp channels in Parallel, How bad is it?

So the PrimaLuna DiaLogue Seven amps are stereo units run with channels running in parallel at the output taps with a special type of feedback to balance out the channels. So why the big rise in distortion (fig 12, pg 92) at the frequency extremes? If a "normal" stereo tube amp is connected up with the channels run in parallel, how much worse is the distortion? Art didn't seem to mind the DiaLogue's performance, so I wonder if the distortion is more of a "bench issue". I have used tube amps in this fashion and they do sound different in mono vs. stereo (in mono the soundstage seems larger yet a little diffused.

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