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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
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.
acoustat6 OP
357 posts
 
Hi Holenneck, you said "If you have a well engineered speaker and a treated room, exceptional sound can be achieved."

Well you ain't just whistling Dixie with that! Truer words were never spoken.
Thanks, do you have a graph of your room?

Hi JPV, thanks for posting and keep up the good work. Keep us posted if you achieve a better response and let us know how it improves the sound or other observations.

Hi Chad, thanks I am happy that I could help you out. You are now firmly on the right track.
Bob
jpv
23 posts
 
Wow, A phone call from Acoustat6 to help you out, What a guy :) Chadnliz my graph is better then what is was. Basicly you was as a flat line as possible with some exceptions. Just remenber you can't boost a dip with a eq or turning up the amp on the sub, etc. If you in a null your not going to hear it no matter how loud you make it.
By moving your speakers, trapping, and moving your listening position are the options. It is hard to do. I have a large peak at 34Hz from my room - the first mode in the length.
I just have to live with it. Its hard to trap a wave that big. I could move my subs but it screws up other frequencies
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