I'm looking for a parametric eq with at least 3 bands. One with an option for the high and low band to do shelving and bell shaped with Q. Is there one like that? I don't care if it's discontinued if there are at least some floating around being sold used. It would also be nice if there was a sweepable LPF and HPF on it. Or would I have to get those separate? Rack mountable or with a rack mount kit would be nice for both devices.