Bi amp with identical amps. 2 stereo amps, or 4 identical monos. If you do otherwise you will introduce phase, frequency response variations, gain variations under different input voltages, and will never get the coherence you might otherwise achieve.
I toyed with idea for a good while, talked to many people more knowledgable than I. If you're like me with a limited ability to modify and electronically alter equipment you won't outsmart electricity. Here's what I found to be successful
Focus on phase coherence, time aligned speakers with minimal crossovers and balanced, differential equipment all the way through to balanced power in the electricity. That's where the magic is allowed to enter.
I toyed with idea for a good while, talked to many people more knowledgable than I. If you're like me with a limited ability to modify and electronically alter equipment you won't outsmart electricity. Here's what I found to be successful
Focus on phase coherence, time aligned speakers with minimal crossovers and balanced, differential equipment all the way through to balanced power in the electricity. That's where the magic is allowed to enter.