Celestion CF18VJD 18" Subwoofer SpeakerSize: 18"
Power Rating: 1600W RMS
Frequency Response: 25-1.5kHz
Impedance: 8 ohms
Voice Coil: 5" round copper
Resonant Frequency: 34.3 Hz
Magnet Weight: 112 oz.
- 18" ferrite magnet, cast aluminium chassis LF driver delivering 1600Wrms (AES Standard) power handling and 97dB sensitivity
- 5" high temperature, dual layer, Inside/Outside voice coil for higher efficiency, preventing sensitivity loss through thermal compression
- FEA optimized magnet assembly delivers highly symmetrical cone - movement, leading to exceptionally low harmonic distortion
- Vented front plate increases airflow to provide enhanced cooling
- Twin demodulation rings reduce flux modulation, minimizing electromagnetic distortion
- Double suspension and "multi-roll" surround provide exceptional linearity at extremes of cone excursion
More information here.