SA-Series v.2 15" Subwoofer RMS 1000 watts Dual 2 or 4 ohm voice coils Vented magnetic gap Aluminum 2.75” voice coil former for superior heat dissipation Innovative high-velocity vented frame spacer ring Large aluminum Faraday ring for smooth acoustic response Patented high-strength cast aluminum frame High-temperature voice coil wire Spring-loaded terminals Stitched-on double “XL” tinsel lead wires The impressive 15-inch speaker represents a significant upgrade from its predecessor, now offering over 35mm of mechanical excursion. Its 2.75” coil is a technological marvel that outperforms most 3” coils without adding weight. Additionally, the motor incorporates a large magnet shorting ring to minimize distortion and ensure a smoother response across the entire acoustic spectrum. This speaker also boasts a robust double-layer spider with fully tied-on and doubled-up “XL” tinsel leads, along with a competition-grade paper cone and a durable foam surround, making it a top-notch choice. Specifications T/S SPECS SAV2 15″ D2 SAV2 15″ D4 RE (Ohms) 3.89 5.83 FS (Hz) 36.8387 37.4160 VAS (L) 51.9387 45.3391 Qes 0.5847 0.6963 Qms 5.1005 5.7094 Qts 0.5245 0.6206 Le (mH) 3.6326 4.7903 BL (NA) 24.4656 29.1578 Mms (Grams) 388.9706 431.9464 Cms (uM/N) 47.9860 41.8886 Sens (dB @ 1w/1m) 88.22 87.08 Enclosure Specifications Sealed Enclosure 2.0 cu ft Ported Enclosure 3.0 cu ft Recommended Tuning 35Hz Recommended Port Area 44 sq in Displacement Depth 8.65" Outside Diameter 15.59″ Cut-Out 14.01″ Physical Dimensions Download Enclosure Designs .Zip File