Helloa..... I have just gotten a Spector Euro 5 LX and really love this bass..... But I'm having some problems with the TonePump.... since the bass was used from the beginning but I got it from a local music store there is a warranty on it. The thing is that should I try to fix the TonePump in it or should I replace it with an EMG BQC system ? Is there a big difference between these two preamps or ?