Interesting! That does sort of sound similar to what I'm hearing. Strange that it doesn't do it on my other amps if it's the bass pickup, but then I find that the Ampeg is inherently brighter sounding than my other two amps(Orange Terror Bass and Fender Rumble). It's worth a shot! I'd sooner replace the Ampeg than ever get rid of my L2K. Soooo pretty.