Call 603 659 5335 or email me

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.

  A: Outer diameter   8 1/4"
B: Hole diameter7 1/4"
C: Total depth2 3/16"
F: Mounting diameter7 3/4" (8)
G: Rabbett depth5/32"

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Al Major Credit and Debit Cards Accepted

7 Kelsey Road, Lee, New Hampshire 03861

Prices can change and specifications will improve without notice

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