Epique E150HE-44 5-1/2" DVC MMAG Extended Range Subwoofer 4 Ohm per Coil
SR-B40A Dolby Atmos Sound Bar and Subwoofer - Yamaha USA
BOSS Audio Systems P129DC Phantom Series 12 Inch Car Audio Subwoofer - 2600 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, Hook Up To Amplifier
Amazon.com: Bobtot Surround Sound Speakers Home Theater Systems - 700 Watts Peak Power 5.1/2.1Wired Stereo Speaker System 5.25" Subwoofer Strong Bass with Bluetooth HDMI ARC Optical Input : Electronics
QED Reference Subwoofer 40 – fidelityhifi
Focal K2 Power™ 40 KX 16" subwoofer with dual 2-ohm voice coils at Crutchfield
GoldenEar ForceField 40 10" compact powered subwoofer with digital signal processing at Crutchfield
Epique E150HE-44 5-1/2" DVC MMAG Extended Range Subwoofer 4 Ohm per Coil
B1240 subwoofer enclosure 12"/30cm 40 liters
Logitech Z333 Speaker System with Subwoofer 40 W Black 2.1 channels