Depends on a couple of factors...this might help:
Riser Height Calculator
Some guys will build their riser to reinforce certain low frequencies, like a Helmholtz Resonator . I believe this takes a pretty good deal of tweaking though, since you'd have to design the riser based around the sound of the room and what frequencies your looking for.
If you're just trying to stop the riser from vibrating, I'd skip the expensive insulation and just stuff it with fluffy fiberglass.
Feel free to keep us posted on your speaker builds as well, we like a bit o' speaker pr0n ourselves over here in the Dedicated HT side of AVS.
Depends on a couple of factors...this might help:
Riser Height Calculator
Some guys will build their riser to reinforce certain low frequencies, like a Helmholtz Resonator . I believe this takes a pretty good deal of tweaking though, since you'd have to design the riser based around the sound of the room and what frequencies your looking for.
If you're just trying to stop the riser from vibrating, I'd skip the expensive insulation and just stuff it with fluffy fiberglass.
Feel free to keep us posted on your speaker builds as well, we like a bit o' speaker pr0n ourselves over here in the Dedicated HT side of AVS.
