Reference R3 8″ Dual 2-ohm Subwoofer, 500w RMS

RMS Power (watts) 500
Efficiency (1w/1m) 80.7
Voice Coil Configuration 2.5″ DVC 2Ω


Some times a woofer comes along that changes the game. The R3 is just that. It has a high roll surround for an extended excursion. With a big 2” voice coil and a gigantic motor structure, it can handle some serious power. With unparalleled sound quality, this little woofer can get down and hang with just about any other 8” woofer out there. Whether an SPL competitor or an SQ competitor this is a woofer that can do it all.

  • Woven Fiberglass Composite Cone
    All Reference R3 woofers use fiberglass stranding woven together for ultimate strength and less elasticity. A heavy soaking in epoxy combined with the sonic qualities of pulp paper backing proves itself worthy of any system.
  • 100% OFC 4-Layer Voice Coil
    R3 woofers use generous 1.50″ long, 2.5″ diameter 100% OFC Copper voice coils. A vented Aluminum former extract and dissipate any heat build-up, resulting in improved power handling.
  • Extended Excursion Polyurethane Surround
    Polyurethane is a foam compound used in the manufacture of countless gasket and insulation products, known for its adhesive bonding properties. Reference R3 woofers utilize an extended excursion polyurethane surround for its strength and flexible properties during extreme movement.
  • Back Plate & T-Yoke Venting
    Heat build-up is a leading cause of catastrophic woofer failure. Venting built into the T-Yoke, backplate, and voice coil extract and dissipate heat, ensuring R3 woofers keep their cool.


RMS Power (watts) 500
Efficiency (1w/1m) 80.7
Voice Coil Configuration 2.5″ DVC 2Ω
Mounting Depth 5.25″
Optimum Sealed ft3 0.75
Optimum Ported ft3 1.25


Soundstream R3-8
Imp. (Ohm) D2
Re 2.2122
Fs (Hz) 39
Qes 1.3713
Qms 7.1915
Qts 1.1517
Le (mH) 0.9283
Diam 8
Vas (L) 18.392
BL 7.3081
Mms (g) 134.9398
Sen (db) 80.77
RMS 500
Mounting D 5 1/4″
CutOut Diam 7.8″


Recommended Enclosures
Sealed Opt .75 ft²
Ported Opt 1.25 ft²
Port WxL 4″ X 6.7″
F3 (Hz) 33


Owner’s Manual (PDF)