OK, I have a Spector Euro LX 5 string, fitted with EMGs and the Tonepump pre amp. I know this is an extremely powerful pre, so I run the pickups halfway with usually no bass or treble boost. However, the bass distorts into ALL effects. I tried it into my Sansamp BDDI, and I got disotrtion, not overdrive. I also tried it into a compressor, and the same happened when the compressor was on, but not when it was off. I recently changed the battery, and I've also backed the pickups off. Any ideas?