Posts by Felgar

Yeah I'll definitely have seating in front of it. At the low < 100 Hz frequencies we're trying to get at with the riser, I don't expect the seating will do enough absorbing to eliminate the benefit of the riser.

Quote: Originally Posted by localhost127 ah ha! thanks Any thoughts on whether I should use fluffy insulation around the edges where the longest frequencies will be penetrating, but then in the center use mineral wool or something...

The air gap allows the absorbing material to be located in a position where the velocity of the wavelength is higher, so the positive effect of the air gap is to relocate the material away from the wall where there is zero velocity (and...

Quote: Originally Posted by Bigus But how tall is your riser? If it isn't very tall, it may not be very effective for height modes, and openings in the top decking may not be that critical. The riser's 12", and my ceiling height is...

I'm very encouraged Bigus and I feel like I'm coming out the dark knowledge void I was in just 2 days ago with respect to all this. My intention was to do even better than swiss cheese on the front and back where I'd probably leave the...

If you're talking panels on the sides for reflection points, then Owen's Corning rigid fiberglass 703 or 705 is the gold standard in panel-making material. Some people simply wrap the fairly solid batt of insulation with fabric; others...

Here's a post on getting set up with measurement software. http://www.avsforum.com/avs-vb/showt...7#post18486257

Quote: Originally Posted by stockmonkey2000 This article below mentions on page 5 when discussing gas flow resistivity that low flow resistivity materials are good for high frequencies and high flow resistivity materials are better for...

Quote: Originally Posted by orcarola25 Dennis, I cannot see the vents very well. Are you referring to the vents being installed on the plywood/platform of the riser. I was planning on putting holes in the framing underneath the...

Quote: Originally Posted by localhost127 cheap, pink fluffy attic insulation (uncompressed). gas flow resistivity value of the porous material is what's important. 34" faced superchunks of pink fluffy (or larger, if you can do it). ...