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Matched pairs

are really required for amps that don't offer output tube specific bias controls, be they manual or automatic. It's nice for them to be close, but not critical when you have individual bias control.

Many Audio Research amps, for example, use a single bias point for either a pair or a quad of tubes where matching is critical.


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  • Matched pairs - E-Stat 13:18:29 02/18/14 (0)

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