I would guess that the reference mic sold for the Behringer is corrected for in the RTA (that should be the way it works). That has been true of every RTA that I've used. My old standby is an Audio Control 3050A and its reference mic, a C15360. I usually use Alesis digital eq's (two to eight channels). A couple weeks ago I purchased a dBX DriveRack Studio (partly to check out how well the auto eq works) but I'm now waiting for the reference mic (dBX RTA-M) to arrive as it was on backorder. I'd recommend sticking with the mic made for the system.
Behringer DEQ2496 - wow
Has anyone forked over the $300 for this unit? I was using a Z-Systems RDQ-1 between my CD transport and preamp, and decided to try the Behringer mainly because it has 10 channels of parametric EQ vs four for the Z-Systems. I cannot tell a difference in sound quality between the Behringer (digital in-out only... the DACS might not be of the highest quality) and the many times more expensive Z-Systems. In fact, the Behringer is much better ergonomically and has many more features than the Z-Systems. It also has an auto EQ mode which I tried, but prefer to trust my own ears. The Behringer does not have the kind of build quality that the Z-Systems has (the Behringer is very light), but it works very well, and am amazed at the number of features it has and how inexpensive it is. By the way I'm using the unit in a very high-end audio system. I'm curious what others have experienced with this unit. It seems like an incredible value to me.