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.
The four sand-filled hulls insert through the custom speaker cut-out and are held in place with an adhesive. The custom speaker is then inserted and clamped to the inner-rim of the SandTrap sub-baffle.
More Mass/Weight Than MDF
Sand provides more mass & weight than the staple of speaker cabinet construction -- medium density fiberboard. Sand increases empty SandTrap weight from about 1.25 lbs to a sand-filled 8 lbs. We employ the increased mass & weight to re-tune speaker system resonance, minimize (paper/glue/chalk) sheetrock distortion, maximize audio fidelity.
The Measured Specs
This graph exposes a vast distorting gap, with an average 10db loss from 600Hz to 1.5KHz, of a Paradigm P65-R in-ceiling speaker mounted in an infinite
baffle 2" x 4" 16" O.C. (paper/chalk/glue) sheetrock enclosure. Sheetrock paper, chalk, & glue destroys the heart of music and movie soundtracks.
The following graph illustrates the
result of the SandTrap reviving the previously cited Paradigm
The SandTrap -- measurably & demonstrably -- reversed the distorting effects of (paper/chalk/glue) sheetrock.
Installed in-ceiling SandTrap & speaker
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