Am I wasting money on the theory of Bi-amping?

If you removed the passive crossover from your JBL 4367’s and connected your amps directly to the compression drivers, I can assure you hiss would be audible to some degree

Nope. You are describing the scenario of what a normal system with an acceptable noise already present in the chain, but not when you are using absolute silent components. Lookup the AHB2 review from stereophile, the amp not only can adjust the sensitivity (9.8V RMS/22dBu, 4V RMS/14.2dBu, 2V RMS/8.2dBu), it has such a low distortion number, akin to the testing equipment that bench test the amp itself. If your upstream is absolutely silent, if theres noise/distortion in your horn, it's something else. Uber horn lovers pay big bucks for expensive tube amps, not just for it's tone/sound, more often it's for the silent. And they do directly connect to the compression driver with active setup.

I had my system horizontal biamped with mac275s on top and mc601s for bass. Tekton set me up with 4ohm biamp xovers. The whole house rumbles 

I would generally agree with a good number of the responses that indicate a "great deal of added expense to do it right" but yet the benefits are there if there is cost no object.

But here in "beerville", after experimenting with multiple different jumper wires between my mids and highs of Aerial 10 Mk II, I did find one that I liked substantially (Signature series, AntiCable).

Then at the suggestion of long time friend/audiophile Duane, I tried some Mosaic advanced tech speaker cables (now defunct) in a bi.wire mode .. UnBeLieVabLe the difference!

If you want similar tech .. Bionic Cables are similar yet better. I am using their entry level RCA, it is also amazing (coming from much a-b'ing on my system)

@barts - Please tell me that you also bi-wire in your tri-amp system.  I’ve often pondered what the limit might be for a complex audio system.  I would expect that the audiophiles with the most complex would also have the perspective that everything matters (why have a complex system otherwise?), so I can only imagine the challenge of optimizing cables and such, particularly every individual cable can be approached uniquely. 

@mceljo 

No I don't bi-wire, there is nothing to bi-wire.  All speakers cables are the same 10ga.  All the interconnects are the same Audience OHNO single crystal developed by Dr. Ohno.

My rig is somewhat easy to understand...just think of it as regular old rig until you get to the x-over, then its like three stereos all playing the same music (in different frequency ranges). Simple.

Regards,

barts