– 18″ subwoofer – 4″ voice coil wound of Made in USA wire – 2x 1 ohms – alucast frame with dd-logos – power handling 2500 W RMS, 7500 W Peak – weight: N/A – mounting diameter: 416.9 mm – mounting depth: 317.5 mm – x-mech: 100 mm – x-max: +- 31 mm – fs: 27 Hz – qts: 0,7899 – vas: 155.3 Liter – recommended ported enclosure: 142-198 liter ( NET ) – recommended sealed enclosure: N/A