[
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2008, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]
12.181.66.34
In Reply to: RE: Room dimension question & door location posted by vinyl survivor on June 28, 2008 at 09:36:13
Scott,
I went the DIY route on all of my acoustic treatments using Jon Rischs recipes (http://www.geocities.com/jonrisch/a.htm). While they did take some time to build, the project was relatively easy, very fun and even more rewarding than I thought it would be.
My speakers are three way floor standing units with a -3db measurement of 23 Hz. Based on this, I thought I better build the bass traps and wall panels thick enough to deal with that bass output.
I built 20 diameter tube traps for the corners. They go from the floor to within 2 of the ceiling. The rear corners are 10 tall, but because the ceiling is angled down 2 at the front of the room behind the speakers, the front corners are only 8 tall. The front corners consist of two 4 tall tubes each and the rear corners have one 4 tall tube and two 3 tall tubes each.
All of the wall panels are 6 tall and 10 thick. The panels on the front and rear walls are 32 wide and the side wall panels are 24 wide. However, because the reflection points for the left and right speakers are fairly close together on the side walls, the two 24 wide panels are positioned right next to each other effectively creating a single 48 wide panel. The side wall (long wall) panels measure 52 from the front wall and 75 from the rear wall, so that should give you some idea as to where you can locate your door, if you end up with a setup similar to mine.
The panels use 4 of Johns Mansville 814 semi rigid fiberglass (3lb/sq.ft density like Owens Corning 703) and 9.5 thick Owens Corning fluffy pink fiberglass compressed to 6 to yield the 10 total thickness. The entire panel is then wrapped in poly batting and covered in burlap. The panels are spaced 6 from the wall by the bases that I built.
At this thickness and density, the panels do a great job of not making the room sound dead at all. High frequencies have even more extension and sparkle than they do without the panels in the room.
I spent a lot of time with speaker and listener positioning in the room, both with and without the acoustic treatments. Without room treatment, I preferred a position very close to the Cardas Golden Ratio speaker placement (http://www.cardas.com/content.php?area=insights&content_id=26&pagestring=Room+Setup). This yielded a good compromise between imaging and smooth bass integration. However, after adding the room treatments, I found that I could push the speakers back towards the front corners of the room along the Cardas Golden Ratio axis by about 11 thereby increasing stage width significantly without any negative impact to stage depth or bass response. The centers of the front edge of the speaker cabinets sit 58.65 from the front wall and 36.25 from the side walls.
The listening position is just a few inches less than an equilateral triangle position from the speakers at 128 from the front wall, or 52 from the rear wall. Thats pretty close to the rear wall, so the absorption panels were really helpful there. You mentioned placing LPs there to aid in absorption, but I think they might provide more diffusion than absorption. If you end up as close to your rear wall as I am to mine, you might want to consider absorption because diffusion may not be as effective at such a close distance.
My room has no crown molding, so I cant say for sure if that would be beneficial or not. My guess would be not much.
I hope all of this helps and that you end up being as thrilled with your room as I am with mine.
Brian
Follow Ups:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2008, Audio Asylum, all rights reserved ]