Okay, need some advice from those more experienced with live gigging. I just got hired by a new band but am worried my amp just isn't up to the task for live performance. The new band consists of 3 guitars, my bass, drums, and a keyboard. What I am currently using and absolutely love is my Carvin MB-210. It's rated at 250W, 2x10 combo. Great tone, love this amp. It's performed awesome in practices and small shows I've done but I can see where it's going to struggle in a live performance. I've had to run the volume up to 7 or 8 just in practice to push through the guitars and keyboard (this band wants the bass to be very, very prominent). Both of my basses are passive pups. I fear that it will get drowned out when we do go live. Their previous bassist used an Ampeg rig with a 410 cab and, I believe, a head that was rated somewhere in the 1000W range. In the past, the band only ran vocals through the PA. Instruments were run through the amps only. I'm thinking a few options here; 1. Buy an extension cab. My MB has a jack for an extension cab and I'm considering buying the Carvin 210 extension cab to go with it. Maybe the 115, what I really need is low end thump, not a lot of tight mids and highs. But with only 250W, and I think it's only rated at 200W with a cab @ 4ohms, I'm not sure it'll have enough punch even with that. 2. Go direct to the PA. The MB has a direct out for a PA. Any suggestions? Any information is really, really appreciated. Thanks in advance.