Using a Pre-Out to Bi-amp

Given the speed of the signal, I would not expect any time delay in this circumstance to be audible or significant.

On a related point, this reminds me of a review of a Bryston amp that I read some years ago. The reviewer was on record on a number of occasions as saying that a good amp circuit should be designed without negative feedback. The reason was that you can't take a signal and then feed some of it back to eliminate distortion as you can't correct a signal that has already occurred! In other words, the inherent time dealy involved made the exercise futile. In the Letters section of the next issue of the magazine, Bryston responded to some of the points in the review. I think it was one of Bryston's chief designers, Mr. Russell, who regretted the reviewer's continued insistance on spreading blatant misinformation, or words to that effect.

Time delay in speaker drivers is important because you have drivers pumping out sound that travels "only" at the speed of sound. It's also important in the reconstruction of analog from digital signals, jitter, for instance. However, these time effects are occurring at the interface between electrical and mechanical energy or between digital to analog conversion respectively. Signals traveling around the speed of light for a few extra inches inside an amp are another matter.

Anyways, I'll let the engineers argue this one. I will however, tweak the nose of the naysayers by saying that I biamp with different amps and I have no problems at all. All I require is similar gain. I hope that doesn't bother you too much.

Fact of the matter is that an electron is in a fuse about 8.5e-11 seconds and people claim to hear that. But who's counting?
All that has to happen to create time smear is for one amp to have a slight amount of latency....even 1/2 millisecond is about 7 inches of speaker misalignment....and it isn't the speed of LIGHT that matters but the speed of SOUND, which is what....about 1100ft/second?
I think this hypothetical is just as valid as some of the other....persuasions of hi-end.
At least amplifier latency can be tested with a signal generator and a duel trace o-scope.

Amp 1 is 'quicker' or 'slower' to transfer a signal than #2.
Say....about 1/2 milisecond. 1/2 milisecond at the speed of SOUND translates into about 6 or 7 inches.
If the 'late' signal gets to the tweeter, than it will appear as out of phase/ time smeared info. A 3-way system would make matters worse.
Right, of course, about transducer in amp to convert electrical to sound, but IF there is some reason for the signal to take longer to go THRU the amp, there you are.
This, in all fairness, is theoretical. BUT, it is easily tested with a signal generator and dual trace o-scope. If you were only dealing with a length of wire, it'd have to be nearly 1800 miles long to produce such a delay. But, toss in some caps / inductors / RC / LC networks and it could happen.
It is not the distance a signal travels, but the time it takes.
If I were prone to Bi-Amp, I'd use identical amps.
Since this is testable, I have no worries that someone hasn't already thought of this, measured it and discarded the idea.
Another good reason to use identical amps is possible phase invert of one but NOT both. This'll throw most people and cause no end to image / focus problems until properly diagnosed.