CinemaDK
Registered
Thread Starter
- Joined
- May 16, 2021
- Posts
- 7
More
- Preamp, Processor or Receiver
- Denon AVR-X4000
- Main Amp
- Crown XLS 1002
- Front Speakers
- Dali 6006
- Center Channel Speaker
- Dali 6006
- Surround Speakers
- Dali R1000
- Surround Back Speakers
- Dali R1000
- Front Height Speakers
- Dali 2002
- Subwoofers
- Dali SWA-12
Just recently started playing with REW measurements, and reflections.
After investigating, I ended up building a 60x100 cm acoustic panel with 50mm insulation (117kg/m3 density) and 25mm air behind. I found several tests and reports stating that just a bit of air behind the insulation would greatly improve dampening features.
I did all measuring with just the left speaker. It is fairly close to the wall, so it has approx 32-35cm distance to it´s first reflection point, which equals just about 1ms. Now there is no doubt that the panel made a difference, that huge spike at 0,8-1 ms disappeared, so good job to myself :-)
Then out of curiosity I thought I would try to do the measurements both with (blue) and without the air gab (yellow) by simply turning it around:
There is a difference, but I lack experience to interpret which is best or if its doesnt really matter?
I'm not going to change the panels anyway, but I am curious
After investigating, I ended up building a 60x100 cm acoustic panel with 50mm insulation (117kg/m3 density) and 25mm air behind. I found several tests and reports stating that just a bit of air behind the insulation would greatly improve dampening features.
I did all measuring with just the left speaker. It is fairly close to the wall, so it has approx 32-35cm distance to it´s first reflection point, which equals just about 1ms. Now there is no doubt that the panel made a difference, that huge spike at 0,8-1 ms disappeared, so good job to myself :-)
Then out of curiosity I thought I would try to do the measurements both with (blue) and without the air gab (yellow) by simply turning it around:
There is a difference, but I lack experience to interpret which is best or if its doesnt really matter?
I'm not going to change the panels anyway, but I am curious
