The SandTrap is a sand-filled
ABS plastic-framed birchwood-backed speaker sub-baffle.
Each baffle is quartered and shipped as empty hollow hulls.
Each hull is sand-filled with sand provided by the
installer.
The ship-empty sand-filled on-site feature significantly reduces
shipping cost,
which permits the SandTrap's low price.
Insert the four sand-filled hulls
through the custom speaker cut-out
and hold in place with an adhesive. Insert the custom
speaker
and clamp it to the inner rim of the SandTrap sub-baffle.
Sand provides more
mass/weight than the staple of speaker cabinet construction --
medium density fiberboard.
Sand increases empty SandTrap weight from about 1.2 lbs to a
sand-filled 8 lbs.
We employ the increased mass/weight to re-tune speaker system
resonance,
minimize (paper/glue/chalk) drywall distortion, maximize audio
fidelity.
This graph exposes a vast distorting
gap, with an average 10 decibel loss
from 600Hz to 1.5KHz, of a Paradigm P65-R in-ceiling speaker
mounted in a 2" x 4" 16" O.C. wood stud drywall
faced infinite baffle enclosure.
Drywall destroys the heart of music and movie soundtracks.
The following graph illustrates the
result of the SandTrap reviving the previously cited Paradigm
in-ceiling speaker.
The SandTrap -- measurably & demonstrably --
reversed the distorting effects of (paper/chalk/glue) drywall.