The rig: -Fender Jazz, stock; -Ampeg SVP-BSP; -Crest FA901, 850or so watts @ 4 ohms; -1x15JBL 2226H, 600watts handling; -Flite sealed 410 w/ Eminence Betas, 1000watts handling. Cabs are 8 ohms each. Q: I'm not usually running full-on wide open, so am I underpowering my speakers? Would I get better sound using spkers closer to tolerance? Where are the gearus?... Rog.