I may be looking to install an Audere classic 3 band pre in my Lakland. Anyone using this combo? Thoughts? I have a Bart 5.2AP pre in there now but something is wrong with the treble output. Can the treble pots go bad? I used to have plenty of high end zing when set at center detent. Now I have to turn the treble all the way up and sometimes I get feedback. I have literally nothing now at center detent. I'm thinking I may have zapped the pre while using a 'bad' headphone amp. The rest of the pre (mids, bass, balance, volume|active passive) works fine. Is it the pot or do I need to switch out the preamp?