Celestion FTR12-4080DL

Half-roll elastomer surround. Long excursion: 11.25mm mathematical Xmax. Glass loaded paper cone with weather-resistant impregnation.
Optimised double suspension. Airflow vented magnet assembly for dynamic heat dispersion.
Power Rating: Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.
Continuous Power Rating is defined as 3dB greater than the AES rating.
Sensitivity measured on axis at 1W, 1m in 2Π anechoic environment.
Xmax is derived from: (voice coil winding width-gap depth)/2.
Small Signal Parameters are measured after unit subjected to pre-conditioning signal.