Which Digital processor/equalizer ?

If you should choose to go with a Behringer unit: Keep in mind that the Behringer ECM8000 mic is not a calibrated mic. It's response below 100Hz is inaccurate(fast roll-off), and that's why the following advice is found on page 15 of the DEQ2496's operations manual: "Press the large data wheel to exclude individual frequncy bands from the AEQ mode. These bands will not be processed by the Automatic Frequency Response Correction. It makes sense to exclude the low frequency range(up to 100Hz) from Auto EQing, because it is this range that may produce inaccuracies during the calculation of the frequency response, which may impair the results achieved with the Auto EQ." The Behringer mic is not provided with an individual calibration disc. Were you to purchase a mic that comes with a calibration disc(ie: a LinearX), there is no provision for entering the mic's curve data into the Behringer's response calculations.

The Rives CD is excellent, BUT: How flat/accurate do you think the pick-up in a Radio Shlock SPL meter is at low frequencies(You have GOT to be kidding)? What good are response numbers without a +/- db figure(could be +/- 15 to 20db for all you know)? What do you think running a room EQ is supposed to check for? Identifying room resonances, nulls, peaks, etc. all are part of your measurement goals(why you're supposed to aim the mic at the ceiling). Where do I get my info with regards to these mics? By comparing them to actual calibrated and corrected professional mics and RTAs over the years. Whether you believe any of this or not is irrelevant, as long as you're happy with whatever you're trusting in/listening to.

BTW: If you happen to own a Behringer ECM8000 mic: Look at the frequency response curve(typical) that they have printed on the side of the box in which it came. The response actually starts to drop at 200Hz and is 2db down at 100. By 50hz, it's down 5db and rolling off even faster(they cut off the curve at that point).

RE: The ECM8000 box's printed curve(which I'm holding in my hand). Where did you learn to read a response curve? Did you happen to notice the annotation that says, "Proximity Effect"? That means the three curves plotted(BELOW 1kHz) are at different distances from the source. Regarding these three curves: The red curve is at 2cm, and the rise is 12db above the average at 1000hz. The green curve represents 10cm(mic less than 4" from source) and has a broad 5db rise above average. At 1m(the black line)the response begins to roll off at 300Hz, and is 5db down at 70Hz, the curve's cut-off(not the 50hz as stated earier-my bad). Just continuing the same attenuation rate, the response would be -10db at 25Hz. Again- the black curve represents the response at 1m(about 3ft). I doubt anyone's listening position will be that close to their speakers, and the bass response of the mic will be much more attenuated at say 3 to 4m. The mic is flat between 200hz and 2kHz +/- 1db. Above that freq. there is a broad rise to +6 out to about 12kHz then dropping to +3db at 15kHz(where the curve ends). Of course- That's just a curve typical of these mics, and some ECM8000s will be better, some worse. The 6th octave RTA function alone makes the cost of the Behringer DEQ2496/ECM8000 a bargain, and I always try to have them on hand for my cheaper pro-sound customers. BUT- To think that one can accurately adjust one's in-room bass response, without first determining the mic's roll off at the listening position(and compensating for it in your calculations) is purely delusional. That's why the operations manual advises against even having the bands below 100Hz activated during the AEQ function. Behringer know's the combination's limitations. I'm certain many will be satisfied with the results of a DEQ2496 in their system(Look how big Stereo Review's circulation was over the years). Again- If you're happy.........

I use the Behringer's RTA readings to back up the TacT correction in my (very difficult-bordering on accoustic nightmare) listening room, via the TacT's parametric EQ(the DEQ2496 stays out of the system). The Tact 2.2X using it's FFT "clicks" and RCS algorithms, the DEQ2496 using the pink noise track on 'Irrational, But Efficacious!', and my ECM8000(correcting for it's response). Between the clicks(which are sampled before any reflections can reach the mic), the steady state sampling(which includes resonances/reflections), and a bit of Sabine Math tossed in(helps me keep my head in the sweet spot)- My bass sounds/feels quite authentic. The 'Sheffield Drum and Track Disc' and my son playing his drum kit make great references. BTW: That particular mic, and of course- it's box, were purchased about 5 months ago.

Eldartford- The response curve(with proximity effect) for the ECM8000 is on the sleeve that comes on the mic's plastic case. The curve you were referring to(on the outer box) is the mic's tranfer function, not it's freq. response in db. I had to look at a new mic's packaging to find what you were looking at. Curiousity and all that. Happy listening!!