RSS315-PR 12" Aluminum Cone Passive Radiator

Quick Overview

Dayton Audios 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) this radiator is perfect for todays high excursion subwoofers.

Product Highlights

  • SMS (Sandwich Mass System) permits greater linearity by minimizing angular torque
  • Durable yet compliant suspension provides substantial linear travel and mechanical stability
  • Rigid cast aluminum frame with thick black anodized aluminum cone
  • Threaded rod with lock nut for easy adjustment of tuning frequency
  • Includes 6-75 gram weighted disks for simple tuning adjustment
  • Cosmetically identical to our popular Reference Series Subwoofer lines

Product Manuals / Spec Sheets / Downloads

Dayton Audio RSS315-PR Specification Sheet

Buying Options

Dayton Audio is proud to offer our customers a complete line of Reference Series Passive Radiators. These high quality, well-engineered passive radiators are carefully constructed using the same rigid anodized aluminum cone and cast frame as our world renowned Reference Series subwoofers, making them visually identical and a perfect match to the very popular line of drivers.

Each passive radiator employs the unique SMS (Sandwiched Mass Structure) design which keeps the majority of the mass centered between the surround and spider providing greater linearity by minimizing angular torque. These passives are also tunable using the included weights with the bolt-on mass adjustment assembly making them easily integrated into virtually any subwoofer design.

The RSS315-PR 12" passive radiator includes:
1 – Passive radiator
6 – 75 gram disk weights
1 – wing nut (for tuning)
1 – lock nut (for final assembly)

Note: Parameters above are for the passive only with no additional mass added. Parameters with additional mass added are listed in the table below.


Tip: As a general rule, the passive radiator(s) should have at least double the displacement of air (Vd) as the active woofer(s)/subwoofer(s) in the system.

Speaker Series Reference Series
Model Number RSS315-PR
Color Black
Unit of Measure Each
UPC 848791002724
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 7
Speaker Type Passive Radiator
Nominal Diameter 12"
Power Handling (max) --
Continuous Program Power --
Sensitivity --
Frequency Response --
Voice Coil Diameter --
Magnet Weight --
DC Resistance (Re) --
Voice Coil Inductance (Le) --
Resonant Frequency (Fs) 21 Hz
Mechanical Q (Qms) 4.79
Electromagnetic Q (Qes) --
Total Q (Qts) --
Diaphragm Mass Inc. Airload (Mms) 300g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.22 mm/N
Surface Area Of Cone (Sd) 506.7 cm²
Volume of Displacement (Vd)


317.4 cm³

BL Product (BL) --
Compliance Equivalent Volume (Vas) 78.9 liters
Maximum Linear Excursion (Xmax) 26 mm
Drivers Mechanical Losses (Rms) 7.77 kg/s
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material --
Voice Coil Former --
Basket/Frame Material --
Magnet Material --
Overall Outside Diameter 314 mm
Overall Depth 87 mm
Baffle Cutout Diameter 282 mm
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --