Amazon.com: 5 CORE 12" inch Full Range Subwoofer Car Audio Dual Cone Speakers Give High Powered Sound Quality, 23 oz Heavy Bass Premium DJ Subs RMS 75W Peak 1200W, 8 Ohms Woofer
Concept CSP-15 at Onlinecarstereo.com
Audiomobile GTS 10″ subwoofer
10” Concept Subwoofer Speaker for Sale in Glendale, AZ - OfferUp
Mercari: Your Marketplace | Mercari | Subwoofer, Mercari, Home appliances
Small Toy Truck Carries A Large Black Subwoofer Or Audio Speaker Concept For Car Audio Or Touring Musicians From A Rock Band Black Background Free Space For An Inscription Stock Photo -
Concept HPX-10 at Onlinecarstereo.com
Concept DP-12 at Onlinecarstereo.com
Custom fit subwoofer box with Concept subwoofers in Manhattan, KS | Item 6402 sold | Purple Wave
Concept Enclosures Ported Sub Enclosure Box For 15 Sundown
Just picked up these bad boys for really really cheap, but have no idea what they are so I can't find an RMS rating, they are older probably around 2000-2010 : r/CarAV