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"The second method of biamplification is known as theÿ
verticalÿconfiguration. This differs from the standard method in how the output of the two power amps is applied. In the vertical biamp, one amp is used to power only the left speaker and the second for only the right speaker. For this arrangement, the use of
ÿidenticalÿamplifiers is imperative.
In this case, each amplifier will still receive two channels of information from the preamplifier, but they will both be the same. The amplifier dedicated to the left speaker will now receive a pair of left-channel outputs from the preamplifier to feed bothits right and left channel. The second amplifier, dedicated exclusively to the right speaker, will then receive a pair of right-channel outputs from the preamp for both its left and right input. This can be achieved in the same manner as used in the standard configuration, but by simply changing how the two patch cables are connected to the Y-adapters at the back of the preamp.
You then use each amplifier to run its own speaker rather than having the tweeters driven by one amp and the woofers by another. You would, for example, use the left output of the left amp to drive the left speaker's highs and the right channel of the left amp to drive the left speaker's lows. The right side being a mirror image of the left. No, it is not necessary to use the left channel for highs and the right for lows, I simply chose them in order to describe the hook-up.
This method has a distinct advantage over the standard configuration. Cross-talk (the tendency for one channel to "bleed through" to the other and thereby cause distortion) in the power amplifiers has effectively been eliminated. Both channels of each amplifier see identical information, so even if there is any kind of spurious leak-through of audio between left and right, because it is the same signal, it cannot create harmonic or inter-modulation distortions. This configuration offers the highest potential for left and right separation available from a biamplified setup."
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Not my words, but explains it well!
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