Active Car Audio System 10 Inch Subwoofer 30Hz-80Hz Bass Square Speaker - China High Sensitivity Car Subwoofer, 10inch Square Car Subwoofer | Made-in-China.com
Focal SUB 12 ST6 RED Powered Studio Subwoofer Frequency Response (30Hz – 400Hz) | Reverb
Buy Earthquake Sound MINIME P63 S, Compact Subwoofer, 30Hz - 160Hz, Silver - Prime Buy