I'm in a band that for many years has used a very basic PA (Mixer > Power Amp > 2 x JBL 15" two way mains and Mixer > smaller power amp > 2 x floor wedge monitors). Now, I've gotten a rack mount dual 15 band EQ in a trade and rather than immediately throw it on eBay, I thought I'd try and use it (or at least ask the experts). We don't gig much anymore, but we've never really had any problems eq'ing the rooms we play with just the mixer. I guess I'm having trouble coming up with a reason to use this more comprehensive EQ. Would an EQ like this be more useful if we had a bigger PA with a sub and if we were micing instruments (we just use the PA for vox and sometimes acoustic guitar)? Thanks for any help you might have.