I need help with my room


Rooze came over yesterday with a TACT room analizer(?) which showed the frequency response of my system in my room. I will try to post pictures of the results, but suffice it to say that the entire frrequency response is muted. I have one spike at about 40Hz but everything is an average of 6db below what it should be.

There are pictures of my system so you can see some of the room, although I have taken down all my room treatments. This did help, but not enough. The room is carpeted and has a cheap acoustic tile ceiling. I was wondering if fire rated tiles would help in the midrange and treble?

Any ideas for getting me to where I should be? HELP!
128x128nrchy

Showing 3 responses by nrchy

Here is a link to the graphs http://topwebpromotion.com/nate.htm
I don't know if this will help at all but there are three graphs of what was measured in the listening room by Rooze.
It is easy to forget how little information I included with my posts. I figure since I know what I did, that you must too!

The measurements were taken many times. I think it was a total near seven. The microphone like type thing was placed on the back of the listening chair within inches of where my own ears would be located while listening. The speakers are about three feet out from the back wall and on the left side about two feet out from the side wall. On the right side this is not possible since there is a door on the side wall, and a little farther out into the room is a staircase going up. No room is perfect and mine is as imperfect as the best of them.

The measurements were taken with all room treatments in place, with the speaker placement adjusted, and then again with some, and then all treatments removed.

I should probably mention that I had Rooze’s Cary V12 monoblocks driving my speakers rather than my Krell FPB 200. I’m not sure how much difference that will make as far as measurements are concerned.

Sean, you need to keep in mind that there is a fine line between bravery and stupidity. Be careful not to give me too much credit. Carl is correct when he describes the listening room as a near nearfield. The speakers are about eight feet apart (I’m not home now, so I can’t give exact dimensions) and the listening chair forms a triangle with the two speakers with the chair, of course at the apex of the triangle.

I realize that most peoples systems don’t sound as good as they think it does. I was concerned about the accuracy of my system, hence the attempt at quantifying it. No audiophile worth his/her salt would say that they have wild frequency swings, or phases issues, and not feel the urge to hang their head, or at least, their salesman.

I probably have not taken enough measurements, but I’m wondering if I can do anything with the amount of information I have at the moment.

I admit that it is difficult to determine whether the frequency issues are speaker, room, or speaker and room interactions. Does it really matter what the source of the flaws is though? If I were willing to replace my speakers, or my room, neither of which is an option, then that would be more relevant, but I’m not in a position to do either, so I need to fix the interaction as much as possible.

Onhwy61, I have asked myself the question: how important is a flat frequency response at the listening chair. I just want to assure myself that I am getting a reasonable facsimile.

We did use the TACT in correction mode, and actually I preferred the sound without it, but I will readily admit that just because I like something, or even worse, am used to a certain sound doesn’t make it right. My goal in ‘opening this can of worms’ was to get a little better sound from my system as opposed to just having it sound like I want it to sound.

I don’t know if this makes any or much sense to anyone else, but that’s where I am.
I'm not necessarily trying to get a flat response, I just want my system to sound better.