Is bi amping worth it ?

@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. 

It's definitely worth it for music and home theater.  I've done powered subwoofers and the bi-amping with a Yamaha AVR, but nearly all brands with mid to higher models have that option when they are 7 channels or more.

Then there is Y adapter from the main speaker output into a power amplifier (s) channels to have the ability to connect to your bi-amp speakers.  It really can open up the performance,dynamics and even clarity of the vocals and instruments. 

It all depends on your source, pre-amp or receiver, power amplifiers and finally the speakers. I have found that different combinations of brands of pre-amp or receivers, power amplifiers and speakers all act differently. 

High current with high power makes a big difference with receivers and even with power amplifiers, which translates to really opening up the abilities of decent  speakers to really good hi-fi speakers.

Best of luck with your endeavors in trying things out to get your desired results.