I haven't been the biggest of fans of the Mark Bass heads. I owned a LM II for about a week and it sounded thin and papery with the cabs I owned. Avatar 410, Ampeg 410HLF, and Nemesis 212. I did however like the Ernie Ball HD-500 (which I owned for a good while). Fast forward 6 months. I had my Avatar cab up for sale and had some local interest and took the cab over to his house to try out. He had a LMII and a SWR Red Head combo. Good lord. The LMII sounded warm, articulate and the low end was incredible, even on his low B. With the volume only about a 1/3 of the way up we were rattling walls. So we went 50% and and I could feel my bones rattle. That cab NEVER even hiccup'd and the B string was CLEAR as a bell. I tried this cab with a Shuttle 6.0 and it DID NOT half low end this head produces or sheer volume for that matter. I have an Avatar 212 Neo Celestion prototype and I can tell I haven't EVER heard an amp/cab combo I liked better. Even after Ampeg SVT's, Mesa Walkabouts, Shuttle 6.0's etc. I feel all of the negative press I have given this amp needs to be recanted, even after trying the LMII through just about every cab Guitar Center sold and other Avatar cabs at the time it sounded bad to me. With that particular cab it sounded great.