18" Passive Radiator kits

[noah katz]

All parts (less adhesive) for four 18” Passive Radiators

$95 ea/OBO + shipping from 94043, pickup welcomed

I'm guessing they're good for at least 35 mm excursion; it's hard to tell from an unmounted surround

One set of parts consists of:

18” cast aluminum basket (with poorly applied black paint)

18” heavy rubber surround (from the high end Acupower drivers; these were prototypes and are softer than the ones they chose for production)

10” spiders (evaluation units from TC Sounds; I don’t know if they used them in production drivers)

PVC connector tube (PR disk to I.D. of spider)

The following were machined from MDF:

PR disk with angle to match surround

Spider housing

Adapter to attach back of PVC tube to spider I.D.

Screws to attach spider housing to basket

Threaded steel fittings to go in center of PR disk to attach additional mass



Two sets of PR parts:



Closeup of disk:



Closeup of spider housing and disk:



Machining the surround angle:



MDF parts primed:



Surround dimensions: