SansAdresse wrote:
If you want to convert to a full biamped system, using the receivers
built in amp for either the highs or lows, then another stereo amp
for the other section, that's an altogether different animal than
you first presented.

This what it is about: the subwoofer is powered, it has its own
amplifier and line level inputs.

I need to insert a crossover, send the low-pass part to the sub, and
keep the high-pass part to feed it back to the integrated amp. That's
a very classical scheme:

INTEGRATED AMP - (Pre-out) --- [...Active crossover...]
INTEGRATED AMP - (Main-in) --- [High pass]...[Low pass] --- POWERED
SUB

Thank you for your time.


Do you already have a suitable stereo active x-over? Have you decided what
the x-over point should be? The sub amp should have an low-pass filter, so
all you really want to do is reduce the amount of low frequency info sent to
the main amplifier and speakers, right?

In that case--although I would still try the resister network first [KISS
theory]--you could try to find a suitable take-off point in the amplifier
which comes after the volume control, but *before* the tone controls (if
such exists...the tone controls could come before the volume, in which case
you're screwed....). That way, you could send unequalized audio to the sub
input, and use the amps tone controls to reduce the l-f signal to the main
speakers.

Sorry, but I still think you're *way* overcomplicating this. Try tapping
the speaker output and see how it works. You might like the sound of the
main speakers complimenting the output from the sub (be sure to try the
phase switch in both positions). You can achieve much the same as the above
by simply turning down the bass control on the amplifier and turning up the
sub.....

jak