Ground Zero GZPW Reference 250

25 cm / 10? High End SQ Subwoofer Handmade in Germany 2 x 2 ohm, 500 WRMS, 50 mm / 2? copper voice coil High tech 3-layer sandwich cone, light-weight rubber surround, Double-layer BIMAX / Connex spider, Linearised high efficient motor with double ferrit magnet Delivered in Made in Germany wooden-box.