OK- I have a pristine '82 JCM800 2205 head that looks like it was bought and stored in a closet. It has a few issues that I'm trying to learn more about and decide if I should persue resolving them. Here's my rig setup: 2205 head run through a 1960 Vintage cab, 1999 Gibson LP Classic 1960 reissue. No pedals other than a tuner and noise gate run into the front. An MXR EQ, MXR Phase 90 and Caitlinbread Ecorec run through the effects loop. All my pedals run off of isolated power and I use Mogami cables. Here are the issues: 1) It sounds real muddy in the boost channel. I mean flubbery like a cold bowl of oatmeal. The normal channel cranked breaks up pretty good but, c'mon, I didn't buy it to run that channel. It should be hair raising crunchy in the boost channel. Also, when switching between the normal and boost channel there is no volume change. it just sounds worse. 2) In overall volume it's really not that loud for a 50 watt amp run into a 4x12. I have the exact same head in a combo ('86 4212) and it just SCREAMS and sounds exaclty like it should. It buries this poor 2205 in volume (and sadly tone too). This thing should be loud enough for Rob Halford to hear it 2000 miles away, right? Here are my 2205 settings (from L to R): MASTER Presence 8 Vol 9 Reverb 2 BOOST Bass 3 Mid 8 Treb 9 Vol 9.5 Gain 10 NORMAL Bass 7 Treb 8 Vol 8 I've messed with the EQ settings to no avail. I also don't want to run OD, boost, etc pedals into the amp as a band aid, I want this thing to melt faces like it should. Any thoughts on how to get the 2205 to sound like the screamer it's supposed to?