12″ Passive Radiator

Our passive radiators offer a solution for small space and low tuned applications where a ported (vented) enclosure would be optimum, but where space does not allow for the use of a properly sized port opening or port length. Our radiators offer the user the ability to tune their enclosure lower than conventional ported enclosures normally allow for, in less space.

To say it simply, A passive radiator takes the place of a port when there’s not enough room for one. If available space is lacking, but you are not willing to give up output or sound quality, a passive radiator may be the perfect option.

Standard version features include:
12″ spoke aluminum cast frame – Black
12″ rubber mounting gasket
Rear mounted stud for weight adjustment
8″ progressive roll poly-cotton spider
Kevlar impregnated pulp cone body
1.5″ wide roll rubberized foam surround

 They are manufactured to the strictest standard, and guaranteed to last.
Hand built in the USA!

 T/S Parameters for 12″ Passive Radiator:
Fs = 25.0 Hz
Qms = 5.65
Sd = 490cm^2
Vas = 135 L
Mms = 225.0 g
Cms = .245 mm/N
Xmax = 65mm total
Usable excursion = 3″ total
Maximum moving mass = 2200 grams

Enclosure Recommendations:
Passive radiators are recommended to be used as a replacement for a port. You should generally use about the same or slightly less enclosure volume with a PR that you would with a port. PR’s can be used to achieve a low tuning in a moderate or small sized enclosure by adding weight to the rear. The more weight that you add, the lower tuning that you’ll achieve.

The only limitation will be the upper tuning frequency. Depending on the size of the PR and the internal volume of the enclosure, there will be a maximum tuning frequency limit. For help with this, please contact us directly.

If you would like to customize this radiator with performance or cosmetic options that are not available in our online store, please submit a
Custom Subwoofer Request.

Physical Specifications for 12″ Passive Radiator:
Rated Diameter 12″ / 300 mm
Overall Diameter 12.5″ / 318 mm
Bolt Hole Circle 11.27″ / 286 mm
Cutout Diameter 10.5″ / 267 mm
Mounting Depth 3.5″ / 89 mm
Rear Stud Clearance* 5.0″ / 127 mm
Displacement 0.10 ft.³ / 2.83 L
Shipping Weight 7 lb / 3.17 kg

*The rear stud of the PR is left long, to make it easier to add additional weight to the radiator. The rear stud will travel beyond the rear edge of the frame during normal operation. If a shallow mounting depth is needed, this stud can be trimmed shorter. Trimming the rear stud can allow for the PR to be installed at the mounting depth of the frame only, without any additional clearance needed.