Equipment: Carvin B1500 Glasstone lil'g 212 Vt-bass deluxe I was running the vt-bass into the signal return, using the b1500 as a power amp. I had it up quite loud, with the b1500 around 8 volume. First off, Though it sounded loud on its own, it was just lost in the mix. In comparison, I ran direct to an Acoustic B200, which isn't anywhere near the power of the carvin/glasstone, yet was substantially louder in the mix. So my question: after maybe 3 hours, the Glasstone started sounding horrible. Farty, distorted, low output, etc... I gave up on it and finished practice on the Acoustic B200. Then today I hooked up the carvin/glasstone and it sounded ok. So is there a notion of a cab getting tired and deteriorating, only to return to normal after a rest? In my experience, cabs either work or don't. If they wear out, they stay worn out. This has me worried because my renown glasstone lil'g seems to be good for a couple hours, but gives out after that. This makes it sort of not reliable, and not feasible for a 3 hour gig with no PA support. I wouldn't think I'm pushing the lil'g past it's limits when I hear people using a Crown xls1500, which pushes much more than the B1500 at 4ohm. If nothing else, I'll run the same practice next week with my carvin brx10.4neo and see if I get a similar result. If I do, then it's either me or the amp, I.e. My expectations are too high or the amp itself is getting tired.