The subwoofer shown above that looks like a giant fan, is offered by Alpine as part of a new truck-specific audio system.
It uses the external air duct for the truck to move air around.
Alpine is expanding truck specific products beyond in-dash radios and into full speaker/amp system, the first of which will ship this spring for GM trucks at a price to be announced.
The “Direct Fit” subwoofer works in model year 2007-2013 GM trucks, and fits behind the rear seats.
Other speakers in the system include four 6.5 inch speakers and two tweeter pods, which are joined by a 5-channel MRV-V500 amplifier.
The subwoofer is only available as part of a package but the 6.5 inch speakers may be sold separately.
Alpine also continues to expand its series of 9-inch radios specific to certain trucks with 5 new models for this year, bringing the total line to 8 units.
New for 2015 are decks for the Jeep Wrangler, Toyota Tundra and the Dodge Ram, as well as new versions of kits for the Ford F150 (for 2013-2014 models with a 4.2 inch screen) and Chevy full-sized trucks from 2007 to 2013.
These join earlier models for different trim models of the Ford F150 and Chevy trucks, plus a universal version.
The company says its 9-inch radios, the largest in the industry, now cover more than 8 million vehicles.
Alpine also showed its first truck-specific backup camera, that fits in the tailgate handle of GM trucks.