Absorption, Diffusion or a combination of it all?


Looking to add more acoustic treatment on the wall behind the speakers. Currently using GIK absorption panels (242). 
Planning to add two more panels that would hang pretty much directly behind the speakers on the upper part of the wall (higher quality image on my system page). 
Any benefit going with diffusors?

Thanks!!!

audphile1

Showing 10 responses by audphile1

All…thanks for your thoughts! 
I watched the video and it makes sense but isn’t easy to implement, no room is ideal as far as wall space, ceiling, windows, doors, etc. Good as a guideline though.

So since I’m already using the GIK 242 and 244 bass traps in the corners, I’m thinking to add a set of A2 Alpha Pro, exactly the same design pattern @thyname has in his room. Decent amount of absorption and enough diffusion. I don’t want to completely deaden the room. Still researching. Keep the thoughts and suggestions coming. 

@redlenses03 I spent quiet a bit of time dialing in speaker placement. I’m sure I can squeeze some more out of it when the room acoustics are dealt with. 
Need to look into REW. Haven’t had the time yet. 

I got an email chain going with Mike Major of GIK. His recommendation based on information and pictures I provided is to fill the side walls up with at least 5” thick absorption panels all the way to the level of listening chair and go as thick as possible with bass traps on the front wall. 
 

I’m evaluating all suggestions at this point as I continue the researching. 

Experimented today with all the panels (GIK 242) except bass traps leaned against side wall at first reflection points. It helped with better focus, imaging was more precise and the soundstage deeper and wider. Front wall was bare. 
I think it depends on the room size. Diffusion may work combined with absorption in my small room. If the room was larger it’s possible the diffusion alone would be fine. Not sure. I’ll need to try. So far I think Mike Major is on point with absorption. 

Taking time to research. I’m using the panels that I already have to experiment. I’ll play with REW soon. We’ll see what it does. 

Going back to the original discussion…a follow up…

Got the first pair of Range Limiter TriTraps. Replaced a pair of 244s that were used as bass traps with Tri Traps. Moved the 244s to the first reflection points on side walls. There’s a very nice improvement in bass definition, texture and details. I’m also hearing better clarity in the mids and highs and I suspect it is due to the way the tri traps mitigate standing waves.

GIK ships out as they manufacture the panels. Still pending - two more range limited tri traps for the upper half if the wall, two more 244s that will cover the first reflections on the sides and allow me to hang the existing pair of 244s on the ceiling. 

I’ll post more updates as I introduce additional panels. 

So the best combo seems to be the corner tri traps(range limited) and the 244 panels behind the speakers with 242 treating first reflections on the sides.
Cloud/ceiling panels on the way. Will post an update once installed.
Updated system photos. 

I like these GIK Tri Traps with range limiter so far. Didn’t suck up the bass. Just improved its definition. Ozzy may be these will work with the planars. Worth looking into. 

@ozzy that’s regular tri traps. Ones I was referring to and what I bought were with range limiter…Based on my listening tests, the description on GIK site is accurate

  • RANGE LIMITER – with a membrane, bass traps absorb even lower frequencies while the membrane has less effect absorbing upper frequencies

The range limiter is an option you can select when ordering.