10" CAR SUB SUBWOOFER ACTIVE HELIX B 10E 10-INCH ENCLOSURE 300W GERMAN MADE 4016050722515 | eBay
Brax, Helix, Match by Audiotec Fischer - Powerful and refined - The HELIX K-Series subwoofers These subwoofers fulfil the demands of sound pressure enthusiasts and audiophile music lovers at the same time.
Daily SQ System in Mercedes C320 - Helix K12 to Q12W, Audible Physics RAM6A to Micro Precision 5.16 - YouTube
Helix C 63C — Santa Rosa Cartunes
Helix Blue B10WDVC4 10" subwoofer with dual 4-ohm voice coils at Crutchfield