Well, for slap-echo, the Bag End and other similar devices effectiveness is zero. :-)
Slap echoes are too coherent. Bass traps, etc. rely on the energy in the bass collecting in the corners. By sucking the energy out of the corners you eliminate the ringing. But this works because the rooms ring like a bell. If you put your finger anywhere on the rim of the bell it kills the ringing.
The slap echo energy is all in the middle of the wall surfaces and the wavelengths are too short to attempt to do this. Diffusion and absorbers work fabulously though. :) In fact, with the right lighting they may even make your HT seem less cavernous.
Best,
Erik
Slap echoes are too coherent. Bass traps, etc. rely on the energy in the bass collecting in the corners. By sucking the energy out of the corners you eliminate the ringing. But this works because the rooms ring like a bell. If you put your finger anywhere on the rim of the bell it kills the ringing.
The slap echo energy is all in the middle of the wall surfaces and the wavelengths are too short to attempt to do this. Diffusion and absorbers work fabulously though. :) In fact, with the right lighting they may even make your HT seem less cavernous.
Best,
Erik