Hello everybody, My name is Daniel and this is my first post on this forum so I want to thank everybody in advance for helping me out! I play a Music Man Bongo Single Humbucker 5 string bass. I've owned and loved the bass for 4 years now. I've been having an interesting problem that started a couple of months ago with my bass creating distortion in virtually everything I play it through. In my main project I run the bass both through Logic Mainstage with an Apogee One interface and two analog pedals (Boss Octave and Full Drive II). I am getting a ton of distortion after it goes through the Boss and Full Drive pedal. I know that the Full Drive is a guitar pedal but I didn't used to get distortion. The signal is totally clean going through the computer. The direct out signal of my Mark Bass R500 head is even distorted when I'm plugging straight in. The head is also 4 years old and has been on the road since the day I bought it. I sat in with a Texas Country artist last week and plugged straight into the backline rig which was a brand new Eden head and Gallien Kruger cab. With the input signal padded and the input gain so low that I could barely hear the bass I was still getting a distorted tone both through the cab and through the line out. I had the sound man drop me a direct box and I ran through the monitors and my tone was great. Completely clean. I'm in the studio everyday of the week right now and my tone is clean, but on some of the heavier songs I am having to turn down my volume because I'm clipping despite having the input gain on the interface turned all the way down. Final note: My two 9v batteries are running down fairly often. I play the bass every day and try not to leave the cable plugged in, but even then the 9vs used to last me for months and months. Now it seems I replace both of them once a month. It seems that the output of the bass has dramatically increased. Is there any way to check this with a voltmeter or troubleshoot it ? My tone hasn't changed over the last few months though. I called Music Man and they are clueless to what the problem could be. The electronics on the instrument were replaced about a year and a half ago. I'm dependent on this bass for my livelihood and want to do everything I can before I pull the electronics and send them in to Music Man. Sorry for the long post. I greatly appreciate the community you guys have built here.