A quick summary of specs on these amazing 18" drivers :
- 6" copper 2 layer voice coil in an underhung configuration.
- Largest neodymium magnet used in any loudspeaker
- 97% of magnetic field lines in the gap
- Entrainment techniques used to eject hot air from the motor
- 5 sqft. of heatsink surrounding the motor
- 18mm of one way throw and still at 100% linearity on the BL curve.
- 39mm of one way peak throw
- 1% odd order distortion with 1KW input power