Basic Difference between Woofer,Subwoofer,Speaker,Tweeter - YouTube
SWA-W500 Subwoofer for S60T Soundbar Home Theater - SWA-W500/ZA | Samsung US
8" (203 mm) 8 Ohm, Premium Woofer
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64,Yellow : Electronics
RSL Speedwoofer 10S MKII - RSL Speakers
Dayton Audio MX15-22 15" Max-X High Excursion DVC Subwoofer 2 Ohms Per Coil
What is a subwoofer, and do you need one? - SoundGuys