Redme

Bought an used Spider IV 75.  Amp would cut out and was noisy.  The amp did not like high volume input from guitar.  Particularly with humbucker guitars. 

If I set guitar volume at ~4 or less (general estimate) it appears to work fine.  Above that, amp is erratic.  Hope this helps someone having this issue.  Could

be a fix for other solid state amps with this issue.

The FBV EXPRESS MKII volume and wah will not  work with USB  pluged in to the FBV EXPRESS MKII... Need only the  Plugin from  peddle  to amp (or  POD or what ever)... This is mentioned in the FBV EXPRESS MKII manual...