Is bi amping worth it ?

Step 1: Connect the preamplifier outputs

1. Run the first pair of interconnects from the preamplifier’s Left Pre Out 1 and Right Pre Out 1 to the input jacks of the two McIntosh 601 monoblocks.
2. Run the second pair of interconnects from the preamplifier’s Left Pre Out 2and Right Pre Out 2 to the input jacks of the same two McIntosh 601 monoblocks.
   This will feed a full-range signal from your preamplifier to both amps for each channel, which is required for passive bi-amping. McIntosh recommends using balanced connections if possible for the best performance. 

• this won’t work ? 

This looks like an AI hallucination.

@russbutton  

I read in your comment above with your sentence included below and I wish I was smart enough to fully understand what it means. It’s a very important statement and wondered if you could explain the relationships of the amounts you’re including here.  Thank you

Passive crossovers built into speakers would seem to conflict with biamp efforts when crossover Control devices are added between the speaker and the amplifier when biamping is done.  Unfortunately most speakers are not stripped of crossovers built-in to speakers before people biamp.  I like biamping because it results in dedicated signals going into each Area of the speaker as well as dedicated power supplies and that’s a big step forward in my opinion.

”its 4 ohms at about 1200 hz, but at 600 hz, has an impedance of nearly 10 ohms”.

@emergingsoul  The chart attached to my post shows the impedence of the tweeter I reference, which is the bottom curve you see there.   When people design a passive crossover, they assume that the impedence is constant over all frequencies, but that is not at all true as you can see from the curve on the chart.  

A passive crossover is an electronic circuit which is a filter.  It is assumed that all of the various components - resistors, inductors and capacitors, all have the same values at all frequencies.  The problem is that the loudspeaker driver is also a component in that circuit and it does NOT have the same impedence at all frequencies.  What makes things even worse is that capacitors do change in value as they age, so an old crossover may not operate exactly as intended when it is 25 years old.

Great thread. It's great to see that some folks have dived into this, and that it isn't simply taking you extra amp on the closet and hooking it up. That is takes deep knowledge to do something like this correctly. For some folks I sure this would be a meaningful pursuit. 

bi-amping helps to save power, while keeping SQ at overall high power level, e.g. AB/D class amp for woofer, class A / tubes for mids/highs..

bi-wiring is useful for long speaker cables situations.