mid sweep

Hello, I was wondering if anyone could help with this issue- I have a bass that has an Aguilar OBP3 preamp installed, as well as a John East Mid Sweep 01 (so it has two mid boost/cut knobs). I’m using 18v to power the preamp and the East mid sweep, but the batteries get drained even when the...

I’m seriously thinking about converting my Aerodyne to active. My other basses are active, and I have to do a lot of tweaking of my amp to get what I want when I switch from one of my actives to my Aerodyne. That, and I just really dig the ability to have a wider tonal pallet on board. I...

What's working for you when faced with working out problem frequencies? Do you have a notch filter or a mid sweep? Do you find much difference in the two? I'm thinking a notch filter has a more narrow focus, but not real sure, haven't had much experience with one on bass, just acoustic guitar...