Has anybody tried this, or have any suggestions if it will work.
I have 7 ( soon to be 9 ) petals with direct out. It's not feasible to have 7 or 9 amps to use them all in stereo, but what if I took all the direct outs to a 12 channel mixer then to the second amp for a stereo set-up. Does it sound like it will work?
Sounds like an plan worth trying to me There is no reason why this shouldn't work - to mix it up, you could swap direct/FX every second pedal.
Another approach - very unorthodox - might be to use a line driver and drive all the pedals from the one source ("parallel" instead of "series") and use a 24 CH mixer to mix all the outputs (one per channel) to a sound that most pleases you.
There was another thread that pedals4pv took my idea & tested it out for himself. I remember he said something about the 2nd output of his delay sounding not quite right. I can't be buggered to find it, its around here somewhere.. Maybe pedals4pv might step in.
I tried connecting all the B outputs to one common output jack but found that some delay outputs would overlap the output of the other effects and muddy the sound. I then tried a 4 channel micro mixer but it was too much hassle to bend and adjust it all the time (and impossible during a song) so now I use A/B Y's. I run a fairly long pedal chain and put my stereo pedals in the effects loop of the amp, primarily to shorten the signal path and avoid tone loss. This works best for me as I use a solidstate amp as the second amp and it acts like a hybrid amp with my tube amp generating the response and tone.