The long-awaited HUMAN 81 DK is now available.
Best viewed in "landscape" mode.
PRO 049 Passive Radiator
$45.00 each
Passive radiators are used when designing a vented system, to get around the disadvantages of port tubes. Typically a passive radiator is chosen with a larger area than the woofer (or combined area of the woofers), since at very low frequencies the passive needs to move a lot of air.
Passive radiators are tuned by mass loading. When I sell them for DIY projects, I leave off the dust cap so it can be attached after the desired mass is determined and glued to the apex of the cone.
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A: Outer diameter | 8 1/4" | ||
| B: Hole diameter | 7 1/4" | |||
| C: Total depth | 2 3/16" | |||
| F: Mounting diameter | 7 3/4" (8) | |||
| G: Rabbett depth | 5/32" |
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