Thanks for the FAQ link - very helpful.. However it talks about using high Q for a narrow curve, and low Q for a wide curve. Is there a mathematical formula that defines this more specifically?

Is there any kind of funky sotware available that will calculate these equaliser settings? Has anybody else managed to achieve low-pass or high-pass effects using the empeg DSP?

I've been thinking about RTA for a while but it does sound like an enormous faff. I've come to the conclusion that the normal speaker frequency response is good enough not to worry about too much, but I do need to get the x-over frequencies right to avoid getting distortion everywhere.

I didn't realise there was a bug with Q values not replicating across the channels - presumably this is fixed in beta 12? And how do I set the Q values back to automatic mode once I've been fiddling with them?

Thanks again....