I traveled out of town this past weekend to play a show and used someone else's bass rig (svt classic tube head + ampeg 810). when i plugged in my ernie ball stingray to the rig it only played at about 1/4 the volume it was supposed to. i changed the battery for the active pickups but it didn't make a difference in the sound. when i plugged in the other bands Fender jazz bass the rig worked fine. i havent had a chance to try my bass out on my own gear since i got home, but does anyone know if this is related to the active pickups on the bass or is it possible there could be something wrong with the wiring in the bass itself?