SoundStream R38 R3 500w DVC 2ohm 8" Subwoofer w/ Woven Fiberglass Composite Cone

Reference R3 8" Dual 2-ohm Subwoofer, 500w RMS
RMS Power (watts): 500
Efficiency (1w/1m): 80.7
Voice Coil Configuration: 2.5" DVC 2 Ohm
Mounting Depth: 5.25"
Optimum Sealed ft3: 0.75
Optimum Ported ft3: 1.25

Woven Fiberglass Composite Cone
100% OFC 4-Layer Voice Coil
Extended Excursion Polyurethane Surround
Back Plate & T-Yoke Venting