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Newegg has the Definitive Technology SuperCube II 8" High-Pressure Subwoofer for $400 - $30 off with coupon code EMCYTZT1818 [Exp 6/28] = $370 with free shipping. Features 8" woofer pressure coupled to two 8 inch Ultra Low Bass Radiators, 1250-watt class D amplifier, and 14 Hz – 200 Hz frequency response.

Newegg has the Definitive Technology SuperCube II 8" High-Pressure Subwoofer for $700 - $310 off with coupon code EMCYTZT1688 [Exp 6/3] = $390 with free shipping. Features 8" woofer pressure coupled to two 8 inch Ultra Low Bass Radiators, 1250-watt class D amplifier, and 14 Hz – 200 Hz frequency response.