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In room response

Hello, Lately I have noticed more talk of in room freq response measurements. It has been mentioned in regards to room treatment, subwoofers and their intergration, speaker placement, room size, crossover points, listening volume levels, speaker choices in regards to the type of music you listen to and a myriad of other reasons. I for one fell it is quite important and others seem to disagree to its importance in playback of recorded music.

This thread would be a great place for members to discuss its importance, ramifications, reason for being and to discuss results.

I have seen a few members who allready have posted results of the measurements under their "systems page". I just recently posted my freq response and waterfall graph on my "system" link.

I am quite sure that there are members who have allready done in room measurements of freq response, waterfall and RT60 or other measurements. If you are new to this, a program can be downloaded for FREE at the Home Theatre Shack, it is called the Room EQ Wizard. See link below. It would be used for mesurment only for our purposes, although it can be used with equalizers such as Behringer if you so desire.

http://www.hometheatershack.com/roomeq/

The only thing you need to provide is a sound level meter, which everyone should own, even if you don't use this program. A very inexpensive one is available from Radio Shack and is a welcome addition to any audiophiles toolbox.

I will start off with my freq response from 15-200 hz at 74db reference level posted here;
http://cgim.audiogon.com/i/vs/i/f/1208699468.jpg

Waterfall response 20-116hz posted here;
http://cgim.audiogon.com/i/vs/i/f/1208644826.jpg

Waterfall response 116-210hz posted here;
http://cgim.audiogon.com/i/vs/i/f/1208645085.jpg

Anyone else?

Bob
acoustat6
chadnliz
3,736 posts
 
Wow Bob thanks for the explanation! Do I need any special sound card or are most internal laptop cards good enough (newer computer with Windows Vista).
jpv
23 posts
 
The sound card in your PC will be fine. If your pc can run Vista, REW will be no problem for it. I have been using this for about 4 months now and the changes it has brought about are amazing. You really can't do it by ear, as well as this can. (start the flames)You may like the way it sounds but it may not be correct. There are house curves but until you know you have that dip or peak caused by the room and speaker position and tried to correct it don't get discouraged with your system.
jpv
23 posts
 
here is my room from 4/19. As you can see I need more traps

http://i36.photobucket.com/albums/e43/jpv1988/419response.jpg
chadnliz
3,736 posts
 
I saw your graph Jpv and I have alot to learn about how to make sense of what I am looking at. I would like to add Acoustat6 spent alot of time with me on phone helping me understand all my questions, very helpful!
I am going to try to run some measurements tomorrow if I have all cables I believe are out in my barn.....should be fun and likely very beneficial.
holenneck
127 posts
 
I think this a great idea for a thread, it is amazing to me that more people do not realize the effect a room has on the overall sound of a system.
If you have a well engineered speaker and a treated room, exceptional sound can be achieved.
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