[davros]

Hi,

Been reading with interest, for some time, all the tweaks/treatments that are available. I have tried various things to treat my room but with no real measurements taken and just can't seem to get the balance right. Like most of us, have spent countless $$$ trying to reach the holy grail of audio reproduction and know it so now time to invest into the room acoustics.

My set up is as follow:

Usher BE-10 speakers
Audio Research D400 MK
Sonic Frontiers FL-1 Pre-amp
JL Audio Fathom F113 subwoofer
Various Kimbre Kable IC's and speaker cable
Denon 4308 receiver (Surround duties only)
Whatmough centre and rears (Surround duties only)

Room dimensions:
6.0m (L)
4.75m (W)
3.6m (H)

I have my system firing down the length of the room.

I have taken a few photos so you can get an idea of what my room looks like. Appreciate any help you can provide to me.

Front centre


Front left


Front right


Back of room


Back left


Back right


BTW - I live in Australia if there are any people that specialise in acoustic treatments.

Cheers,

Dave.

[davros]

Sorry, should have gone into more detail as to what my issue is...

I find the bass lacking during music and the sound pulls to the right (slightly), with the instruments being more defined on the right than the left. There is definately a serious null in the room and reflections are also an issue.

My speakers are 1.3m from the back wall, speakers are 2.8m apart and my listening positioning 3.0m back. I have tried the golden triangle (think that is the name for it) approach to no avail, moving speakers forwards/backwards, sideways and also toeing in/out. The speakers are approx 1 m from each side wall.

The current position seems to be the best I can find for imaging and soundstaging but the bass is still lacking. I do use the subwoofer to help out, even though the speakers each have 1 x 11" woofers.

I have panels around the room and have tried removing the first panel to see if that helps the first reflection point but it did not make a big difference.

Dave.

[Ethan Winer]

I find the bass lacking

You need bass traps. Real bass traps, and plenty of them. A room like that needs at least four very thick 2x4 foot traps in corners, and even 20 would not be too many.

the sound pulls to the right (slightly), with the instruments being more defined on the right than the left.

I can't tell what sort of panel is on the right, but the curtain on the left is not adequate for absorbing reflections. Worse, the left is fully covered with the curtain, but the right has only that one panel. The left and right sides need to be fully symmetrical for good imaging.

You'll also benefit from either absorption or diffusion directly behind the listening couch. And your rear speakers should point toward the seating, not across the room toward each other.

--Ethan

[Glenn Kuras]

Here is a layout that might help you guide you through how the room should be set up.
http://www.gikacoustics.com/room_setup.php
And yes the bass traps need to be large as Ethan is saying.

[Rob Babcock]

I agree- you'll need some major bass trapping in that room.

[K Shep]

If you're able to find Owens Corning 703 panels, you may consider building bass traps yourself.  That may be less expensive than shipping panels to Australia.


http://www.audiocircle.com/index.php?topic=77849.0