There are 4 products.
The Dayton Audio Designer Series passive radiators are excellent general-purpose passives suitable for replacement or for new construction. Built to be a perfect match for the Designer Series drivers, these passive radiators feature the same steel frame,
Dayton Audio's RSS315-PR 12" passive radiator is the ideal choice for tuning small enclosures lower than possible with a conventional port. With a thick aluminum cone, cast frame, rubber surround, and incredible excursion capabilities (52 mm peak to peak)
The SB Acoustics SB34NRX-00 passive radiator is a good match to the SB Acoustics woofer SB34SWNRX-S75. In 2.0 to 2.5 cubic foot box this combo will get down to 30Hz. Adding a plate amplifier with a low frequency boost would push the F3 even lower.
This new 16 ohm 12″ woofer from SB Acoustic features a low distortion motor system, paper cone with rubber surround, cast Aluminum frame and 75mm voice coil. The woofer would make a fine low frequency driver for a premium 3-way system, or put two in paral
