there was a lot of misinformation about bi-wiring and bi-amping in the lay press back in the 1980s when speaker manufacturers used to provide "ready to biamp" speakers. unfortunately, 20 years later it seems that as many people remain confused by this as ever.Bigred wrote:Ahh this thread brings back memories. Its strange how many speaker manufacturers call their speakers bi-ampable but all they do is seperate the passive crossover network into HF & LF... no bypassing This I have been told by experts is "fools" bi-amping and ultimately your not bi-amping unless filtering at the line level... in the truest sense I would agree BUT lets just call the fools way passive bi-amping.
More precisely, "fool's biamping" refers to the practice of amplifying full-range signals in two amps, and then throwing away part of the amplified signal by causing a dead short to ground in the output of the amplifier at frequencies that are above or below the crossover point. the dead short is caused when the user mistakenly disconnects the physical connection between the HF and LF sections of the passive crossover without also segregating the HF and LF sections of the signals going into the amp using an active crossover. I think that everyone would agree that presending a dead short to your amp at all frequencies (by shoriting your speaker cables together) is a bad idea, and that presenting a dead short at selective frequencies (by using only half of a a passive crossover on a full range signal) is a bad idea as well.
To dispense with "fool's biamping," all that is required is to separate the HF and LF content prior to amplification using an active crossover. That will remove the "dead short" problem when the two segments of the passive crossover are unlinked. Doing that will place a lot less strain on your amps.
Just to clear things up then, its simple enough to perform "true biamping" instead of "fool's biamping" -- all that is required is an active crossover prior to amplification. Retention of the passive crossover circuits in the speakers has NOTHING whatsoever to do with this.