High Precision 12 Inch 400 Watts 33 Hz ~ 3k Hz Freq Response Creative Car Audio Subwoofer Speaker - Switching Power Supply - AliExpress
Amazon.com: HERTZ Dieci Series DBX-303 12" (300mm) 4-Ohm Sub Enclosure, 250 wRMS : Electronics
Hertz Audio HX 300 (HX300) 12" 4-Ohm Hi-Energy Series Car Subwoofer OPEN BOX | eBay
4 x B&C 18TBX100 18" Low Frequency 2400W Subwoofer 8-Ohms 97.0 dB 35 - 1000 Hz
Amazon.com: Sennheiser AMBEO Subwoofer for TV and Music with Immersive 3D Surround Sound a Thundering Deep Bass Down to 27 Hz - 8'' Woofer with 350W Class D Amplifier - Black : Electronics
Single Ported 8" Design - 0.63 cubic ft @ 35 HZ | caraudiofabrication