Stereo Integrity HST 18″ Subwoofer Our HST series are designed for massive amounts of bass out of very small enclosures. To achieve the latter our HST drivers are equipped with very long stroke, high motor force, motors with 3 shorting rings and a bifilar copper voice coil that is capable of 40 mm of one-way linear travel. That’s right, 80 mm of total linear travel and 102 mm of total peak excursion. Flat and linear suspension compliance is achieved by utilizing a wide soft foam surround and a three layer natural color 10″ diameter Nomex spider. Our spiders have sewn-on flat voice coil leads which completely eliminate lead tap. High-clearance cast aluminum frame is used to support the moving parts and the large 250 mm triple stacked motor structure. Large 4 AWG push terminals allow you all the wiring access needed for hookups. Last but not least is our Carbon Fiber sandwich cone and dust cap for extremely high cone stiffness eliminating any cone distortion. Specifications Quick Info Weight 90 lbs Dimensions (OD) 18.4 inches Dimensions (Cutout) 17.0 inches Mounting Depth 13 inches RMS 2000 watts Materials Cone Material Carbon Fiber – Voice Coil Material Copper Thiele-Small Parameters Re 1.5 Ohms Fs 20.49 Hz Qes 0.40 – Qms 4.89 – Qts 0.37 – Le 1.2 mH Sd 182.6 square inches Vas 209.54 Liters BL 16.6 Tesla Meters Mms 567.8 grams Cms 106.2 µM/N Xmax 40 mm one-way 70% BL SPL 95.28 dB Enclosure Recommendations Sealed Enclosure Volume 4.0 cubic feet Ported Enclosure Volume 6.0 cubic feet Ported Enclosure Tuning 20.0 Hz Port Surface Area 40 square inches Additional Specifications Terminal Type Large 4 AWG – Motor Diameter (without boot) 10.0 inches Motor Diameter (with boot) 10.25 inches
