Gearslutz.com - View Single Post - Odd shaped room with low end grief: tuned or broadband?

A.B · 20th November 2009

Hi all, I’m new to the forum etc.

I have searched out quite a few posts already on this forum, all of them being incredibly useful in understanding the treatment my room needs. However I am still unclear on a few things. Firstly I will explain my set-up:

Currently in a room which is approx 13ft x 13ft ☹ x 7+1/2ft. The room is not a normal shape whatsoever though as although the ceiling is constantly 7+1/2 ft down the centre, but where it joins the walls on either side it curves down to 2+1/2 ft in the back corners. The result is a curved semi-circle type shape when facing the back half of the room, with windows at the very back. I have set up my listening position up the other “normal” shaped end of the room as I wanted to avoid the acoustics of the “eyebrow” shaped end (focal point?). My other issue is that at the normal shaped end, a door is in one corner and shelves in the other. Any treatment I do needs to be temporary as it’s not my property, so moving the shelves is out, and the door needs to open and close fully with no obstruction. The way I see it this leaves me with the front and side walls only for bass trapping, along with the back corners. I currently put my first axial mode at around 42 hz (though this was calculated on the room being a rectangle shape, as I don’t know how to factor in the odd shaped roof). My plan is to super chunk the back two corners, but with them both being short I am concerned this won’t be enough bass trapping. I also have already built 4 bass traps, 4ft x 2ft x 4inches rocksil in wooden frames spaced about 4 inches from the wall: 2 on either side of the listening position to counter flutter echo and two on the front wall. They’ve not made a massive amount of difference to the low end to be honest, so my questions are: to deal with my low end standing waves, what is the best option? More bass traps of the same spec covering the side/front walls? More bass traps of different (please advise) spec covering the side/front walls? Or a tuned panel trap? Also – am I better to fill in the back two corners with fibreglass or build tuned corner traps there too?

Thanks in advance for you help and sorry for the long post!

Alex

20th November 2009	#1
A.B Gear interested Join Date: Nov 2009 Posts: 3 Thread Starter	Odd shaped room with low end grief: tuned or broadband? Hi all, I’m new to the forum etc. I have searched out quite a few posts already on this forum, all of them being incredibly useful in understanding the treatment my room needs. However I am still unclear on a few things. Firstly I will explain my set-up: Currently in a room which is approx 13ft x 13ft ☹ x 7+1/2ft. The room is not a normal shape whatsoever though as although the ceiling is constantly 7+1/2 ft down the centre, but where it joins the walls on either side it curves down to 2+1/2 ft in the back corners. The result is a curved semi-circle type shape when facing the back half of the room, with windows at the very back. I have set up my listening position up the other “normal” shaped end of the room as I wanted to avoid the acoustics of the “eyebrow” shaped end (focal point?). My other issue is that at the normal shaped end, a door is in one corner and shelves in the other. Any treatment I do needs to be temporary as it’s not my property, so moving the shelves is out, and the door needs to open and close fully with no obstruction. The way I see it this leaves me with the front and side walls only for bass trapping, along with the back corners. I currently put my first axial mode at around 42 hz (though this was calculated on the room being a rectangle shape, as I don’t know how to factor in the odd shaped roof). My plan is to super chunk the back two corners, but with them both being short I am concerned this won’t be enough bass trapping. I also have already built 4 bass traps, 4ft x 2ft x 4inches rocksil in wooden frames spaced about 4 inches from the wall: 2 on either side of the listening position to counter flutter echo and two on the front wall. They’ve not made a massive amount of difference to the low end to be honest, so my questions are: to deal with my low end standing waves, what is the best option? More bass traps of the same spec covering the side/front walls? More bass traps of different (please advise) spec covering the side/front walls? Or a tuned panel trap? Also – am I better to fill in the back two corners with fibreglass or build tuned corner traps there too? Thanks in advance for you help and sorry for the long post! Alex