DD audio 718f-D4

- 18″ subwoofer - 3″ voice coil wound of Made in USA wire - 2x 4 ohms - alucast frame with dd-logos - power handling 1500 W RMS, 4500 W Peak - x-mech: 100 mm - x-max: +- 22 mm Re 3.891 [Ohms] Fs 28.93 [Hz] Zm 25.53 [Ohms] BL 17.64 [N/A] Qms 5.449 Qes 0.9796 Qts 0.8304 Vas 146.2 [liters]