GAS Car Audio GPP165D1 Subwoofer 16cm 720 Watt 2x1Ω
GAS Car Audio MAX S1-6D1 Subwoofer 16cm 800 Watt 2x1Ω
4/5/6 Inch Subwoofer Speaker Full Range Frequency Stereo Speaker 400W/500W/600W Square/Round Car HiFi Coaxial Stereo Speakers - AliExpress
Amazon.com: Stage3 627FHI - 450W Max 6"(16cm), 2 Way Coaxial Speakers, Plus One™ woofer Cone, Edge Driven Dome Tweeters, Vented Basket Frame Design, Delivers High Output and deep bass Peformance. : Electronics
Axton ATW16 16 CM Subwoofer 2 x 2 Ohm 75 Watt RMS Subwooferchassis | eBay
GROUND ZERO GZHW 16SPL 16 cm / 6.3″ high quality SPL subwoofer
Carrozzeria (Pioneer) 16cm x 2 Powered Subwoofer TS-WX70DA | eBay
Sony Mobile ES 6 1/2” (16cm) 2-Way Component Speakers | XS162ES
Sennuopu Sk-8 6 Inch Automotive Twitter Car Hifi Speaker Set Bass Tweeters Loudspeaker Sound Active Subwoofer In The Car 16 Cm - Speakers - AliExpress
Sony 6-3/8" speaker subwoofer from SA-W303 | 1-505-925-11 | TESTED - DIY | eBay