NX Audio PD1856-XE 18inch Subwoofer Transducer (2000W)

Application: Heavy dual 18inch touring bass reflex boxes.
Key Features: 5inch precision inside/outside copper voice coil, heavy-duty aluminium basket, 280x30mm ferrite magnet.
Specifications: 18inch transducer, 2000W RMS / 4000W Program, 96.5dB Sensitivity, 8 ohms, 39Hz-1.4kHz. | Thiele-Small: Fs 39Hz, Re 5.3 Ohms, Qms 6.67, Qes 0.31, Qts 0.30, Vas 277L, BL 19.5 T/m, Mms 221g | Heavy-Duty Push Terminals.