Hi guys, I bought a Gunn 200 amp (NZ made clone of a 200 watt Marshall head unit) and just had it refurbished with brand new KT88's etc. I thought this would make a great bass amp but I'm dissapointed with the low end - gets too much distortion from bottom E up to about C. Is this an amp problem or more likely the Cab I'm using? Its a no-name 15" cab which sounds ok but a bit muffled when I drive it with my Ibanez 65 watt amp. The 15" driver is rated up to 360 Watts. Thanks in anticipation.