Ok here's the deal, I must confess to knowing next to nothing about the difference in speakers and cabs, and less than that about how to eq for certain settings and such. I have read through the faqs and taken special note of the EQ faq. I am currently running a Crate BT220 combo and while it handles itself ok in my current band there are a few issues with it I would like to work out. Im on a tight budget so upgrading the amp is not happening in the near future, but I am planning on adding a budget 4 ohm(what crate recommends) 2x10 cab sometime soon(hopefully). Also, I use only passive single coil basses(normally tone and vol are maxed on my basses). When I first started out I had read where a lot of people just flatten the eq and go to work. I tried this and while the sound was just ok, it seemed like I could never get enough volume. The crate has a 4 band Eq including a "level". It also has a built in limiter that supposedly keeps the amp from destroying the speaker. So I did some research and decided that I would crank up the lows and highs and keep the mids at "around" 2 O'clock. I kept the level at 12 O'clock. I actually like the way this sounds, and it does cut through a little better, but I can't help but think I am missing something. Im also getting some rattling/vibrating/farting? when I hit the low notes under these settings, but that could be chalked up to the way the room is setup. No one else seems to notice, but I do. Now I know there are a million other factors that can make an impact on sound. Such as our jam space is small and cluttered with a low ceiling. We play loudish, but I've never had my volume past 1 O'clock. The way we set up in the jam space forces all of our sound to the middle of the room, but I have had issues with cutting through when we played out for the first time also. And it was wide open. So I guess my questions are: Am I missing the boat on the EQ thing? Should I just leave it flat and crank the volume? Or do I just need to find a happy medium between the volume and the level? Or am I doing most things the right way and just need to bite the bullet and get an extension cab? The reason I say this is that I think it may be the single 15 that is holding my sound back a bit. Thanks in advance for reading this essay and any help you can give.