Does anyone have experience with this? I want to use a DL-4 to loop my vocals and get a bit crazy. I've done it successfully at home, and it sounds really great to me - but my sound guru tells me that as soon as you introduce a big PA, plus long cable runs - doing unbalanced guitar effects to the desk is a no no - hiss, noise, evil leprechauns, etc. My current idea is to use a small channel mixer, feed the Mic into a channel so that it is balanced and at the correct level, then feed the DL-4 from the Mic's effects send, then finally from the DL-4 into the mixer's 2nd channel, and out. Will this work? Are Line Level (eg what the Effects send sends out) and Instrument Level (eg what the DL-4 is designed to take) the same thing?