The long-awaited HUMAN 81 DK is now available.
Best viewed in "landscape" mode.
PRO 023 Passive Radiator
$NLA 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 | 12 1/4" | ||
| B: Hole diameter | 11 1/8" | |||
| C: Total depth | 3 3/8" | |||
| F: Mounting dia. | 11 5/8" (8) | |||
| G: Rabbett depth | 5/32" |
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