I bought a Sire Marcus Miller M7 in February. Most impressed. It has replaced my TRB5 completely. However, playing an open mic last night & turned the Frequency part of the stacked knob round to high end & turned up the Tone volume. Did number fine, then was turning back to flat when I experienced a big CRUNCH from the pot. Since I use this setting for several numbers I was concerned. Indeed by the end of the night this had progressed to several crunches quite close together.
After I got home I stuck on my headphones and examined the problem. There were about 3 places quite close together crunching and if you got the setting right on top of one you got feedback overpowering everything. If you switched to passive mode you could still hear it. Not good. I changed the batteries to no avail as I know some preamps give this kind of signal when battery is low.
Phoned Andertons this morning & was passed to their bassman, Dave, who asked all the right questions and after a a few minutes agreed it sounded like a faulty pot and would get the item collected and repaired. I've arranged for it to be collected week today.
No probs. How it should be. Thanks Andertons. And I'm going to mark the circuit board so I know if it has been replaced or if they've just used a blast of pot cleaner. OK, I'm paranoid.
Anyway it was much less painful than I expected.