I've wanted to try out the filled 703 corner thing, but I wonder if adding fiberboard or MDF in between each layer of 703 would trap more bass?? Kinda like a non hanging "Bass Hanger"
or maybe even stuffing pipe with 703 (and maybe fiberboard strips) vs leaving it hollow.
or maybe sandwiching a 2x4 piece of fiberboard in between the DIY broadband panels
links:
http://www.teresaudio.com/haven/traps/traps.html http://www.johnlsayers.com/phpBB2/vi...t=bass+hangers http://www.radford.edu/~shelm/acoustics/bass-traps.html