I have a Spector Legend 5 bass that I put active EMG's (J in neck and 40DC in bridge) with a Spector Tonepump preamp. I notice the other day that when I turn both volume pots all the way down, I still hear a low distorted signal coming my amp. Any idea why this happens? It doesn't happen on my Spector Euro 4 with the same active EMG/Tonepump setup. Thanks!!!