Behringer Eurolive VQ1800D 500W 18 inch Powered Subwoofer | Sweetwater
Difference Between a Passive and Active Subwoofer: Which is Better?
The Difference Between a Passive and Powered Subwoofer
Amazon.com: BESTISAN Powered Subwoofer, 6.5" Active Home Audio Subwoofer in Compact Design,LFE & Stereo Line Inputs & Audio Output, Built-in Amplifier for Home Theater/Receiver/TV/Speakers, Black, SW65D : Everything Else
Difference Between a Passive and Active Subwoofer: Which is Better?