Here is the deal. I had to use my Crest CPX900 amp to power up the Demeter until my Stewart 1.2 that is in transit arrives. I played with the Crest on Thursday. Let me just to everyone that plans on using a CPX series amp as a bass power amp, DO NOT DO IT. This amp sucked. It heated up and cut out on about 10-20 times mid-song. It severely limited/cut my highs and lows with all the protection circuits disabled and the transits were horrible. I was unable to slap or play finger style because of this amp. So, I had to play a gig on Friday but had no reliable good sounding power amp to power the Demeter. I went to the music store and picked a QSC PLX-1602 to use for the night with the intention of returning it the next day. I must say that the QSC sounded very good. I am debating about keeping the QSC because it sounded so good. This amp with the Demeter is the sound i have been looking for for a long time. So, my question is how does the Stewart 1.2 and QSC PLX-1602 compare in sound quality, headroom, etc, etc. Or for a more generic A/B, how does the Stewart World Series compare to the QSC PLX Series. Your experience with these specific amplifiers would be appreciated.