12-inch 150w High-power Active Speaker Subwoofer Home Theater Enthusiast Diy Subwoofer Karaoke Hifi Audio Long-stroke 50-180hz - Speakers - AliExpress
The Hammer DIY Subwoofer Build - GSG Kit - Order with code:Jilesgsg - YouTube
One unit (not pair) |12 Inch Woofer for Bass Compensation of Open Baffle or Cabinet | W-12 - Lii Song (Lii Audio), unique speaker, amplfier, quality and cost-saving parts for HiFi DIY