Only upscaled by our D-series subwoofers in output capability but still giving you the same technology and great low frequency extension. Where sound quality and Transients free of overhang are paramount. Simply no better expression of bass performance then our push-pull subs. Ground up drivers developed by our team of engineers. Glass fiber composite diaphragms, multiple aluminum shorting rings, massive magnets, multi-layer Nomex spiders and lightweight aluminum voice coil wire are the key ingredients – Proprietary nonlinear modeling techniques allow us to simulate all these components and then optimize for real world driver performance – free air and in box.