Passive biamping

Discussion in 'Archived Threads 2001-2004' started by John*DII, Mar 24, 2003.

  1. John*DII

    John*DII Auditioning

    Dec 31, 2002
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    Is there really any benefit of biamping the speakers in avpassive setup? Sending full range to both speakers from different amps. To throw in a second question, would it be better to bi-wire the speakers.

  2. Jonathan M

    Jonathan M Second Unit

    Jul 23, 2002
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    It would be cheaper to biwire, but even cheaper again to single wire.

    With passive biamping one must be careful to make sure each amp has the same gain, and each has the same phase (ie. they're both inverting, or both non-inverting) so that the output is that which is desired.

    Each amp could have less of a load, as the tweeter amp will be driving a high impedance at low frequencies (Easy), and the woofer amp will be driving a high impedance at high frequencies. This ofcourse is a reactive load (Capacitance for the tweeter amp, inductance for the woofer amp) which it may not like, thus this may be a moot point.

    Overall ofcourse, you have more power available. IMO though, if you have a decent amp in the first place, you probably won't notice too much difference.

    Biwiring, although some scientific arguments can be made (Mainly to do with ground currents), I have found that there is no audible improvement, just a cost of extra cable. Far better is to purchase a thicker gauge thus minimizing any impedance issues. It's also less cable to purchase and run.

    Hope this has been of benefit.

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