Enclosed speakers is the only way to go for bass playing period. I have this amp and it doesn't need any modding, it just needs an enclosed speaker. I used it in a live setting with two other guitars and a loud drummer and it worked fine. There's a line out too so if your playing in a venue with PA support this is a great feature for an old amp. It did over-drive the speakers when trying to push the volume but if you have 4-8 speakers @4ohms, it should be just fine if you need the volume. I use 2-10's and 1-15. Again my band is loud, enough so that I had to get an SVT because I hate SS heads.
