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#144179 - 09/20/06 09:14 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: tomtuttle]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 6025
Loc: Bowmanville, Ontario, Canada
The posts are numbered ?

EDIT -- oh, I see. On the forum page.

This post is dedicated to Tom, who made it all possible.


Edited by bridgman (09/20/06 09:21 PM)
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#144180 - 09/20/06 10:51 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: bridgman]
pmbuko Offline
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Registered: 04/02/03
Posts: 16437
Loc: Ben Lomond, California
Indeed, Tom had now made at least three things possible.
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#144181 - 10/15/06 10:03 AM Re: My Superchunk Bass Trap Project, Graphs includ [Re: bridgman]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13565
Loc: Iowa
Ethan just released his new Windows based versions of "ModeCalc" and "Frequency/Distance" calculators, which are much nicer than the old DOS based ones, and offer a few new enhancements..

http://www.realtraps.com/modecalc.htm

http://www.realtraps.com/sbirlbir.htm

enjoy
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#144182 - 10/30/06 09:54 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: SirQuack]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13565
Loc: Iowa
I'm at it again... I've been experimenting with "RoomEQ Wizzard" which is a freedownload on HomeTheaterShack's website. If you have a half way decent sound card in your computer that is full duplex (can play/record at the same time) this product is cool. It compensates for the Radio Shack Calibration errors, and sound card measurements.

The blue line is my target of 75dB's, the black line is the RS calibration adjustment, and the dotted line is the sound card measurement..I'm still learning what it all means...


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#144183 - 10/30/06 10:36 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: SirQuack]
jakeman Offline
aficionado

Registered: 10/03/05
Posts: 853
Loc: Toronto
It looks like you have a nasty suckout between 43-50hz with a 20db drop from 40hz and a not so nasty one at 75hz. Not good. Maybe its time to try that sidewall placement nearfield your seats and then rerun the REW.
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#144184 - 11/14/06 03:22 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: jakeman]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13565
Loc: Iowa
Well Jakeman, I've been busy, but had time to play with this stuff a bit recently. I tried placing the sub on the left wall about 6 ft back from the stage, the results were not much different than what I had before. I did move the sub around on my stage from left to right, and now have it near my left speaker again. I also flipped the phase switch to 180 which made a difference in the graph. Also, I moved my left/right speakers back towards the wall an inch and reduced the toe angle so it was not as severe. This seemed to help the freq's on the high end. I'm still new to this Room EQ software, but heck it is free and fun to play with. Below are my 1st graph and most recent 2nd graph.

What do you all think, besides that I'm crazy.




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#144185 - 11/14/06 10:17 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: SirQuack]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10621
Randy, besides that you're crazy I think that the improvement of about 10dB in that dip around 47Hz is interesting. Was it after you changed the phase switch that it happened?
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#144186 - 11/14/06 10:23 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: SirQuack]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 6025
Loc: Bowmanville, Ontario, Canada
Looking good. This is the point where I would use an EQ to knock down the two remaining peaks, listen smugly, and occasionally mail anonymous room response plots to Mark.
_________________________
HT: M60ti/VP180/QS8, SVS PC+ 20-39, EP500
Music: M5HP, Sierra-1, M40ti
Idle: M2ti, M3v4, VP100
John

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#144187 - 11/14/06 10:37 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: JohnK]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13565
Loc: Iowa
Hi John,

I know the changes from 20-45hz was a result of my switching the phase switch. I believe this did help bring this dip upwards. But more than that change, I think moving my sub from the middle of the wall, closer to my left m60 really brought that up...
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#144188 - 11/14/06 10:40 PM Re: My Superchunk Bass Trap Project, Graphs includ [Re: bridgman]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13565
Loc: Iowa
Thanks John B.

Believe it or not, I still have 6 pieces of Owens Corning 703 that I plan to use for the rear corners of the room. I also may rearrange my ceiling panels, and use them for wall/ceiling corners.

Mark, you got your ears on good buddy.
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