Popular Post GUTB Posted February 3, 2018 Popular Post Share Posted February 3, 2018 There's a couple of factors. There's the common wisdom of pairing preamp output impedance at least 1/10 of the input inedence of the amp -- this shouldn't be a problem most of the time. You don't want the preamp bottlenecking the amp so make sure output topology matches and bandwidth is close. If you are using monoblocks the pre should be true balanced topology (dual mono most of the time) -- the signal is not summed or combined in any manner. If your amp goes out to 150 KHz the pre should go out to at least that much. Now you may ignore some matching for the sake of outright quality gains from super high performance preamps like an Audio Note for example -- the net SQ gain is better than a lesser but balanced pre unit. Mshenay and DancingSea 1 1 Link to comment
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