I was experiencing a crackling note (kinda like it broke up) when playing through my Magellan 800 this morning. I recently put TI Flats on my Landing bass (which has a single Darkstar pickup). Playing it in church this morning through my Berg HDN112. Normally I play finger style, but wanted to hear the flats when played with a pick.
Anyway, there was an occasional "broken up" sound coming when I hit a certain note (maybe 5th fret on D string). I was playing through the clean channel, and no overdrive pedal. I heard it several times while playing a warmup song... guitarist did too. I then realized that the volume control on my bass was turned to less than 1/2 way. I turned the volume on the bass up, and decreased the volume on amp a bit, and no longer had this "breaking up" sound when playing with a pick. It's interesting that I didn't hear it happen when I was playing finger style (even with the original volume knob setting on the bass)... just noticed when using a pick, with volume on bass set to less than half.
Anyway, I'm wondering if having the volume on bass turned down too low can cause an issues with the amp. I tried various settings on the Berg's crossover, and it seemed OK (once I had the volume knob on the bass higher). I don't think it was fret buzz. Maybe its something due to the signal from a Darkstar?
Thanks,
Chris