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In Reply to: Re: Choosing ? posted by Rick on August 12, 2005 at 05:13:09:
Methinks you aren't clear on how to bi-amp...
What you are describing regarding "dual binding-posts" IS, actually a Bi-Wire configuration when using one x 2-channel (ie: Stereo) amplifier and NOT a Bi-Amp configuration!!
In this configuration, you don't need "dual binding-posts", as it is better to common - at the amplifier end - each pair (hi/lo wires) for the "positive" (red) and "signal return" (black).
The reason its better to use a single set of binding-posts than "dual binding-posts", is that, most amps with two sets have one set that is "switched" - the switch compromises the signal path.
If you want to bi-amp a pair of speakers, you need 4 x amplifier channels configured - two pairs per channel, with each channel's pair split between hi and lo frequency. In this way, the tweeters of the two speakers, each have their own amplifier channel - and the mid/bass drivers of the two speakers, also each have their own amplifier channel.
Bi-amping also requires that the pre-amp be equipped with "dual pre-amp out" sockets to allow the pre-amp to feed a signal to both stereo amplifiers.
This configuration is known as "passive bi-amping" as it relies on the cross-over network in the speakers to handle low-pass/high-pass signal "splitting".
Another option is "active bi-amping" in which an active cross-over is installed between the pre-amp and the power amps and the cross-overs in the speakers disconnected (warranty issues?).
Obviously these options all have a price tag...
a. Bi-Wire: Just the cost of a 4-conductor pair of cables & terminators.
b. Passive Bi-Amp: As for a. above PLUS a second stereo amp
c. Active Bi-Amp: As for b. above PLUS cost of active cross-over
In terms of value per dollar spent - go with option a. and, at the amp end of each 4-conductor cable, common the two "reds" into one connector and the two "blacks" into another connector.
Don't forget to remove the "shorting links" on the speakers' binding posts - otherwise all efforts would be for nothing...
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