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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
 
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
holenneck
127 posts
 
not sure how to post my in-room response, but it is pretty snazzy, especially since i am incorporating Anthem's new room control.
chadnliz
3,736 posts
 
I couldnt find a cable I needed that I thought I had so it will be tomorrow before I can get my mini male to female stereo RCA adaptor.
strabo
15 posts
 
04-23-08: Holenneck, not sure how to post my in-room response, but it is pretty snazzy, especially since i am incorporating Anthem's new room control.
I'm curious, since you have the tools to look into this, how does "room control" affect the waterfall graphs or RT60 decay?

Can you post before and after pic's of the RT60 with the room control?
strabo
15 posts
 
As to follow up my previous post, is there a target RT30 or RT60 time?

What made me ask is we have a small auditorium at work that seems like it was built using the classic LEDE approach and it is D E A D. IMO, it is overkill and boarderline difficult to listen in. I know I don't want my listening room to sound this dead. Is there an optimum measurement to shoot for?
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