Hsu Research VTF-15H Mk2 is the new flag ship model. 2000 Watt 15 inch Subwoofer in Great Condition. Works perfectly, it just has some light scuffs on the top.Specifications:Amplifier - 2000w short-term, 600w continuous amplifier with a class A/B output stage/switching power supply, featuring a custom EQ, soft clipping, subsonic filtering, phase switch, 24dB/oct low-pass adjustable Linkwitz-Riley crossover, continuously variable Q control, high-level inputs, unbalanced inputs and balanced XLR inputs.Driver - Newly Redesigned 15 ultra high excursion driver, with double the magnet of the original VTF-15H, and a cast frame.Enclosure - 24 x 18 x 26 H x W x D (add 1 to H for feet and 2 to D for heat sink and grille) featuring rounded corners with a smooth, matte, satin-black finish. Utilizes the innovative flared triangular port design with the large cross-sectional area to allow for higher output levels with less port noise.Measurements - 16 Hz low end extension with one port open and 22 Hz with two ports openCEA2010 (measured 1m from woofer, peak): [2 Ports Open/1 Port Open]40-63 Hz: 128.2 dB/126.220-31.5 Hz: 120.2 dB/119.7