40hz room mode RPG Modex Corner trap?

Jburidan...The PARC is by all accounts a fine piece of equipment, and if you can afford it and buy it I am sure you will see a big improvement in your system.

However, for other readers, if not you, I do want to correct several comments and misconceptions about the Behringer.
1..Unlike the PARC it can boost as well as cut. (Word on the street is that a future version of PARC will do this also).
2..It includes a 61 band specteum analyser (or Real Time Analyser, RTA) so you can easily see what is wrong and how it gets fixed.
3...It has a completely automatic equalization process that eliminates a lot of guesswork. (And is fun to watch).
4...As you say, it has many (31) bands, with bandwidths adjustable from 1/3 octave and up. But it also has several bands of parametric equalization, and several notch filters (cut only like PARC) with bandwidth as small (sharp) as 1/60 octave. There are a bunch more things it can do, but with the possible exception of delay (to compensate for speaker locations) you probably would not use them in the home audio application.
5...It is digital. IMHO, to reject it simply for this reason, without ever actually listening to it is stupid. The A/D and D/A are modern 24 bit modules run at 96KHz. FWIW, 24 bits gives resolution 256 times better than a CD, and the bandwidth is more than double. The actual digital processing is done by a 32 bit Floating Point processor, so there is no issue of resolution for this function. Of course these are all words, and one should not accept them as a garantee of good sound any more than one should accept your suggestion that the sound must be bad. Please reserve judgement on how the Behringer sounds until you hear one.
6...Finally, it costs about 1/10 of a PARC. This is a good deal for a spectrum analyer (to help with your PARC setup) even if you are never curious enough to put the Behringer in your signal path.

Probably should pick up a copy of the Master Handbook of Acoustics to learn a bit more about the basics.

The basic school of thought that I have got off several forums is that Broadband bass trapping is the simplest acoustical method of dealing with room modes with my situation. I guess what people are telling me is that with increased broadband bass trapping I can bring up the nulls around 40hz and cut a bit on the 40hz hump. I think that the idea is that while I may not get a huge cut at 40hz if things are over all smoother my ears will fixate less on the problem area. I'm going to give this a try and then may explore other options.

As to the Behringer, it really seems to be a smoking deal in terms of features/price and as noted the spectrum analyzer function alone could be very useful. I think that many people are suspicious of adding another set of A to D to A to their system. I guess it is simple to try it with all settings flat and see what it does to the analog input. If it doesn't adversely effect inputs from vinyl or SACD then a suppose then hey there you go. I actually have few doubts about the digital side of the Behringer, but would be shocked if the analog output circuity cost more than a $1 ... it may sound pretty good but no matter how good your source you are now limited by the Behringer's output quality. For myself if I was running a transport / DAC set up like I was a couple years ago I would jump on trying it between the two. In that situation I would have all the benefits and still have my DAC's analog stage in line with the preamp.

Eldartford, in your system is the Behringer transparent with everything flat and using an analog input signal?

Thanks

Nikturner920...To my ears, with Channel Islands D-200 amps driving Magneplanar MG1.6 through 4 foot Goertz cables...YES.

However, if you determine audio quality by how much it costs, check out the Reference Audio Mods changes, available for the DEQ2496 and costing about $1500, including $600 output transformers said to reach the audiophile heights.

Again I repeat my mantra...Buy it for the RTA. The EQ will sell itself if you try it.

Interesting, just found your review post. What are you using for a source if I may ask? Seemed from you other post you go from the 2496 straight to the amps?

Nik

Nikturner920...Although I do have LP, my best source (IMHO) is a Denon 2900 with Underwood mod, via unprocessed pass through of Rotel 1066.

My three DEQ2496s are between the preamp and the power amps. It would be better to use a TAPE loop (unaffected by volume control) but that is not available for multichannel. I could put the DEQ2496s between the Denon and the Rotel, but then I could only use them for disc player programs.

For 2-channel you could run digital from a cheap player into the Behringer, which would be an equalizer and DAC rolled into one, and then out through a passive attenuator to the power amp. Lots of Bang for the Buck.