Originally Posted by Ndrameda81
I was using the pedal as a preamp for my Passive jazz to match the volume output on my Ray35. It was second to last on the chain as I have the BBE sonic stomp after the PBDDI. I was only using the 1/4 out to my amp since we've been running the XLR out of the amp. The buzzing was pretty bad whether I had the pedal engaged or not. I frst had the pedal powered with the 9V and then thought maybe that was the culprit so I switched to battery powered. Same problem. I think we are using a Mackie mixer. Not sure how he has the settings trimmed. I may have to ask if he had the phantom power on but I'm pretty sure we turned that off. I tried switching all the buttons with no avail. Hope you can help.
Battery operation is always the quietest so I would stick with that for the moment. Try to find out how the PA is set. The ground lift switch on the Bass Driver only works on the XLR output.
It sounds like a ground loop problem. What is the amp you are using? I would recommend trying the amp xlr out to the PA with nothing else plugged into the amp. See how quiet or noisy it is without playing. Turn up your amp a bit with guitar volume up but not playing. If your amp is quiet try the same test at the PA. Turn up the mixer channel and listen for any noise. If there is noise, your bass amp's DI should have a ground lift switch. Engage it and hopefully that will remedy the problem. If all is quiet go to the next step.
Disconnect the XLR cable from the amp that is going to the PA. Plug your bass into the Bass Driver (powered by a fresh battery) and make sure that the 1/4" output on the Bass Driver is set for instrument level (no boost). Set the pedal for unity gain at first. This means that the volume with a preset engaged is at the same volume as when the pedal is bypassed. Check to see if there is any noise as you described. If it's quiet, plug the XLR out from the PA into the DI of your amp and see if there is noise.
Another thing to try is to not use your amp and just go from the Bass Driver DI directly to the PA via the Bass Driver's XLR output. If there is noise engage the ground lift button. Certain amps have noisy DI's or sometimes something fluky happens.
I'm not totally understanding how you are using the Bass Driver to match levels. Are you just using it as a clean boost with the blend off?