Just out of curiousity, how many people use EQ's with their amps? I have a JCM800 4104 combo that I waiting to get back from having a tube buffered FX loop installed. I've read that some people use EQ's in their loops even though my only purpose for the loop was to get my H&K Replex delay after the gain stage. Since I love to mess around with the searching for the "ultimate tone" I recently picked up an MXR 10 band EQ based on the positive reviews I have read on the unit. I'm thinking that an EQ will let me fine tune the frequencies and from what I understand, most mods, not gain mods, really just fine tune the EQ. I also understand that some tubes are brighter, some darker, so I would think that an EQ can adjust that as well. FWIW, I've been using JJ's, EL34L's and ECC83's from a company called Eurotubes. I'm looking forward to getting my amp back and messing around with the MXR.