Cdc, No answers yet to your specific question, but good responses nonetheless. I don't think you'll find anyone here who has actually used one of these equalizers, so, since they're so inexpensive, why not blaze a trail and let everyone know about your experience?
In response to two of your questions, you need two channels and 1/3 octave (31 band). You need 2 channels because if you are trying to undo room reflection problems (ignoring Rives's very good advice), they won't be the same on each side. You need 31 band because unwanted peaks are sometimes very narrow and you dont want to create a suckout in a nearby frequency.
I agree with Rives, however, that you should only use an equalizer to correct low frequency room problems. I have had brightness problems in one of my rooms, and tried almost everything you can think of, finally deciding that the speakers I had in that room were not suitable for that room. Now, with different speakers, no problem.
I am tempted to ask what speakers you are using. As soon as you answer, however, you'll get 20 recommendations of other speakers, and I know you are pretty familiar with the sonic attributes of a variety of speakers. Others would ask what cables you are using, etc. Let's not go there. It may be that your speakers are just bright. I noticed you commented once that a certain small inexpensive speaker was dull sounding, where I find the same speaker a little rolled off but not dull. Most audiophiles' systems and speakers are too bright for me, the inevitable result of the neverending quest for "detail."
Some things to consider: any glass or other hard reflective surfaces in the room? coffee table between you and the speakers? drapes over windows? how low is the ceiling, and what distance between the speakers, ceiling and you? Speakers tilted back at all? have you tried them in a different room? What happens when you set them up in a nearfield configuration so the sound you hear does not include any reflections?
Good luck,
Paul
