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Depends on the speaker, if it were going to drive let's say a modern B&W the impedence curve even on 4 ohm tap goes to near 0. The autoformer corrects and maintains the impedance throughout. Any Klipsch or JBL would not matter at all. IIRC old low efficency Dahlquist have weird impedance curves as well.
I have a 4100 receiver which has either the 752 or 4 amp and it is sweetie.
Carl
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Last edited by CarlV; 10-06-2013 at 12:46 PM.
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