Speaker measurement results, your thoughts?

Hello, I've installed my speakers in my control room, the things under consideration were stereo image, frequency response and distance to listening chair, and this is the results I've come to by measuring, and placing speakers where they fit the bill. What do you think about the results? I guess it sounds almost as it looks, a bit sharp and a strange mud in 49 hz register, but all in all very good stereo image and overall feel, but I will certainly have to check out the register below about 200-250 hz for treatment, what results is acceptable as an end result, for a trustworthy listening/mixing environment? I also wonder about the high freqs which seem to dip as higher they become, is this normal? How should I deal with this? How would you recommend me treating the rest of the room? Broadband bass absorbers? Panel absorbers focused on the peak at 49 hz? a mix? I would be really glad if you shared your opinion. This is my real first test, so I've included the test details for you to examine and find possible failing elements causing inaccurate measurements. First the measurement details http://img269.imageshack.us/img269/6793/testzln.png Then low gate time/more smoothing results http://img269.imageshack.us/img269/8377/rplusdgraphic.jpg Then high gate-time and less smoothing http://img269.imageshack.us/img269/4803/rplusdgraphic2.jpg Ps Green is L Blue is R Thank you very much Ossian

Impossible to say what's wrong and what's right, without a detailed model of your room, and photos. Post that, and maybe folks here can help. I'm curious as to where all that vibration below 20 Hz is coming from: do you live close to a freeway, railway line, industrial site, or airport? Having that much vibration at very low frequencies must be very annoying. - Stuart -

Ok, I've now made a picture of the room, and made some additional measurement WITHOUT absorbing panels, I've got 8,64 m2 of 10cm thick 65 kg/m3 absorbers installed generally, and I've also included those photos in this reply. Strangely enought they seem to not do that very much to freq response, room reverb set aside. The red and teal one is without absorbers. http://img4.imageshack.us/img4/7041/rplusdgraphic3.jpg This is what the room look like, ceiling height 3,3m http://img682.imageshack.us/img682/6016/roomc.png The walls is brick, ceiling wood. How would you suggest me go forward from this point? I'm confused about the high freqs which of some reason lacks in the measurements, the mic is behringer ECM 8000 which is supposed to be very flat(at least not dip in high freqs) so I guess it's either the room, or faulty measurements, but other than that the measurements have reacted predictable, what do you guys think? So what about further treatment? I don't know the RT60 values, but the room is rather neutral for the moment, could be dampened a bit more I guess but not very much so in that case it will have to be low freq control devices. According to what I've learned fibreglass panels is supposed to be very effective in a big part of the register, as long as they are of right density, thickness and spaced to the wall, is this right? Thanks

Ok, I've now made a picture of the room,

I think you didn't understand what I was saying: not a diagram, but actual photographs of the interior of your room: Several photos, taken from different places, and looking in different directions. Plus, a complete, accurate SketchUp model, in 3D, or your room, with the correct dimensions, and showing the exact location of your speakers. desk, mix position, windows, doors, construction materials, bass traps, etc. It is impossible to guess what your room looks like, how you have arranged your mix position and speakers, what the shape is, etc. That small "diagram" you posed only gives a rough idea of the size, and shows that the room is not symmetrical (which might be a big problem too!), but it does not show anything of the things that are critical for determining the acoustics of your room. Without all of the above, there really is no way that anyone can help you. We cannot see what you are seeing, unless you show it to us, in great detail!

I'm confused about the high freqs which of some reason lacks in the measurements,

A wild guess here, but you perhaps have too much absorption that is affecting your highs, and not enough that is affecting your lows. There are ways to deal with that, but first we'd have to see what you have in there already. Maybe it is even due to something simple like thin carpet on the floor or walls, sucking out the highs, or maybe curtains. Hard to say without seeing what you have....

So what about further treatment?

Further to WHAT? We don't know what you already have in there, so speaking about additional treatment is pointless. You might already have too much of one kind, or you might have too much of another kind, or not enough of both. Unless you show us, we'll never know... - Stuart -

Whats up with these people. Its like going to the doctor and ask him for a Recipe... "what for?" the doctor says Do what Stuart says and we can help you then