My Spector Euro 5 is overloading my preamp. I get a distorted sound from my speakers when I lay into the strings hard. Have the gain on my SVP Pro dialed fairly low, no peak light, and it's still happening. I also have the both volume knobs on the bass dialed very low, and the bass and treble knobs backed way off. No problems at all with my passive Warwick Corvette Standard. Any help would be appreciated. Tks.