I love the sound of the doubler, but it is a phasing nightmare, and sounds terrible in mono (ie floor wedges), and I would never use it for recordings. A competitor has an enhancer block, that does this really great, and something similar would be amazeballs.
I also experience phasing when combining two IRs in a stereo cab. don’t know it at all possible, but some sort of time calculation to prevent this would rock. And no, flipping doesn’t do the trick 
I’ve never heard a double-tracker that doesn’t phase in mono. It’s a natural artifact of “close but not quite” pitch and time alignment. Even real double-tracked instruments and vocals produce phaseing, albeit, not as much because they aren’t from the same wave form.
Can you tell more about the phase-free double tracker you heard? Do you know how it works?
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It’s the enhancer block in the axefx. If you don’t go too crazy, there is practically no audible difference in tone when I check in mono (in one of the modes, can’t remember which). I would never record with it, but used it live quite often.
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Yep, stereophony BUT mono compatible. There are Always phasing effect…but..there Is a threshold..or limit. Axefx Is more mono compatibile…waves, brainworks too.
The eq with 10 band L and R can do a mono compatibile double effects..tricks of 90’s
QC doubler Is ANTI mono compatibile 
Interesting…I wonder what they do differently from the QC’s doubler. If you mute the straight signal, does the delayed signal sound different in any way?
I don’t think that’s possible. Will check later
I guarantee you that all the doublers have weird effects if you listen in mono. There’s no point in using a doubler if you’re in mono, unless you want the chorusing/phasing effect that it does
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I don’t understand the point of a doubler in mono. You’re effectively just creating a delay with a really short delay time, hence the phasing or chorusing effect.
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The “enhancer” you’re talking about could just be a subtle chorus effect, and not really specifically a doubler. Probably why you find it more pleasing since a chorus with a lower mix can be a nice tone enhancer. If that were in stereo it would sort of work as a slight doubler/stereo effect. But different than a specific “doubler”
Bob Katz, a guru master of analog and Digital world/domain.
And you Will learn why monocompatibility Is important in stereo listening too.
I’m familiar with the recording and mixing process, and the importance of listening back both in stereo and in mono.
In 99% of cases where I want stereo spread guitars, I would just fully double track a part (hard-panned left and right). No phasing issues when listening back in mono.
Sometimes it’s cool to pan a guitar part on the right, for example, and then have a separate bus with a delay, 100% mix, panned on the left. I would make the delay line about 90-100 ms to give it a slapback feel in stereo. Again, when listening in mono, it doesn’t feel out of place.
Anyway, to bring this back to the doubler effect topic. Using a doubler is cool for an immediate “in the room” feel when playing live (in stereo) or riffing while sitting at your desk (in stereo), but it’s just weird in recordings and ultimately not very useful in mono.
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