The Apocalypse DB-SA2508 is an 8" subwoofer designed for superior bass response. It offers a double magnet motor structure and a frequency range of 20 Hz to 2,500 Hz, making it ideal for a wide range of music styles. Its high SPL output and low distortion make it perfect for clear, powerful sound. SPECIFICATIONS: Model DB-SA2508 D1/D2 Type Subwoofer Size 8 inch Voice coil size 2.5 inch Cone Pressed paper Magnet Ferrite Voice coil wire CCA Surround Foam RMS Power 800 W MAX Power 1600 W Frame Alu Impedance 1+1 / 2+2 Ohm SPL 84.7 / 85 dB Fs 35 / 35.9 Hz Qts 0.55 / 0.56 BL 18.3 / 21.4 Vas (L) 19 / 19.7 Xmeh 28.00 / 28.00 mm Xmax 14.00 / 14.00 mm Mounting depth inch (132.7 mm) Cut-out dimension inch (189 mm) Gross weight 20 lb (9 kg)