I love to tinker with everything I own and was reading a thread on GS112 and using Deltalite for a speaker replacement. I have one so immediately read the thread http://www.talkbass.com/forum/showthread.php?t=289087 There were points made about the deltalite and sounded just what I needed to make the workingman 10 more than just an exceptable practice and small gig amp. There was a new Deltalite that the owner acquired from Avatar that was on the bay. Picked it up for $59. I put it in this afternoon and it the difference was more than I expected. My 5th string was a definite improvement and the generally tinny sound went away. Everything sounded fuller and clearer (especially the highs) and the tone was improved. My Grendel 5 had very zingy highs through this amp and know they are cleaner and fuller. Looking forward to taking it out next tuesday where I play with a group of acoustic guitarists. The last benefit is that the combo is almost 6 lbs later!!!!