no---a 6.5" driver isn't capable of reproducing sub-bass frequencies at a usable volume level. A 10" driver is the minimum, IMO. What do you need the speaker for?

As for the subwoofer – it has a (paper/foam) 6.5-inch driver in a Medium-Density Fiberboard (MDF). The power output is 140 W (peak). The frequency range is 45 Hz – 150 kHz, and a THD of < 5% (at 250 ...