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?
A small subwoofer with 200W of power and 25Hz lowest frequency Powerful sound from the "smallest footprint on the market" ...
McIntosh’s new PS2K Powered Subwoofer ($50,000/ea) is an absolute monster standing over 6.5 feet tall, and weighing 458lbs. The PS2K sub contains four 13-inch woofers, and 2kwatts of total power.