For the best sound, you'd probably want to mic the amp, put the EDP in the mixer aux loop, amplify the EDP through a clean monitoring system. Or, use a silent speaker box (guitar speaker inside a small soundproofed box with a mic mounted inside, and send that the mixer and put everything through the clean monitoring system. Lots of gear to move around though.
Or, like you said, get amp with an effects loop. However, many guitar power amp sections aren't really designed to handle a complex signal such as live guitar plus loopage. I used to use a Mesa 50/50 and EV cabs, which were both so clean that it wasn't really a problem.
On Thu, Sep 4, 2008 at 5:20 PM, Zak Kramer <email@example.com>
I love the sound of a great guitar through a vintage style tube amp. This probably makes me somewhat of a looping oddity...I like the contrast between old school sounds & new school techniques. Thing is, that forces me to run the EDP in front of the amp. Some guitar/amp combos fare better than others, but it's certainly a compromise. Sometimes it's not even that -- it just sucks; lots of noise, decapitated high end, etc.
So, I take it that the solution is an effects loop. But it's a pretty rare '62 Princeton that has an effects loop, and I'm not about to mod mine so extensively.
If I understand these things correctly, adding a mixer won't be any advantage (although it'd let me use other instruments, but let's stick with guitar right now.)