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JL Audio Stealthbox® SB-GM-AVAL/12TW3

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Availability: Out of stock

The JL Audio Stealthbox® SB-GM-AVAL/12TW3 is a custom made box and subwoofer combination that is designed specifically for Chevrolet Avalanche from 2002-2013 as well as Cadillac Escalade EXT from 2002-2009.


JL Audio Stealthbox® SB-GM-AVAL/12TW3

Cadillac Escalade and Chevrolet Avalanche Custom Sealed Fiberglass Box & Subwoofer Kit

The JL Audio Stealthbox® SB-GM-AVAL/12TW3 is a sealed box with 2 12TW3 12" subwoofers with 800 watt power handling and is wired for 4 ohm mono. This setup replaces the factory mid gate while maintaining the folding function to allow access from the cabin and the bed. It's coated with a black textured finish and features a black steel mesh subwoofer grille included at no additional cost.

Please note that installing the SB-GM-AVAL/12TW3 causes you to lose the rear glass storage.

This is the newest model of the JL Audio Stealthbox® which features the new TW3 thinline 12" subwoofers which allow for a much lower profile without sacraficing the amazing sound that you would expect from any JL Audio product. Expect that clean rich deep bass without any distortion. Performs well at higher volumes.

Installation of the JL Audio Stealthbox® SB-GM-AVAL/12TW3 is seamless and straightforward. Using the vehicles factory midgate attachment hardware, the SB-GM-AVAL/12TW3 box is designed to seamlessly slide right into place without loosing its folding functionality. The 100% fiberglass box is a sealed enclosure and is coated with a heavy duty material that matches the bed of the truck.

Compatible Vehicles:

Escalade EXT - 2002-2009

Avalanche - 2002-2013

Product Manual

Click Here

Recommended Amplifier

JL Audio recommends the JL Audio HD750/1 amplifier.

Return/Warranty Information

Please note that due to restrictions placed by JL Audio, the entire Stealthbox® line is only appowed for return/exchange with priori written approval from JL Audio support team. In addition, returns for a refund are subject to a 40% restocking charge.


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