89-99 Chevy / GMC Extended Cab – Dual 10″ or 12″ Box

(2 customer reviews)


Custom Opening Size

A custom opening is a different cut-out diameter than our standard. – Please review our “Before You Order Section”, before selecting Custom Opening.

Subwoofer Brand

Cut-Out Measurements

Product price: $169.16
Order total:



Subwoofer Enclosure Specifications

♦Dual 10″ or 12″ Sub Box
♦Down Firing Enclosure
♦Platinum Spring Loaded Terminal
♦100% American-made GREEN enclosure
Installation: Fits under rear seat, enclosure will protrude about 1 1/2″ from under the seat. Removal of jack required. Note: Mounting depth based on a 6.5” diameter magnet.

Fits the Following Vehicles

♦89 to 98 and 99 Chevrolet/GMC Classic 1500/2500/3500 Silverado/Sierra Extended Cab
♦Will work on a 3rd door option.

Speaker Box Technical Specifications

Width: 55″
Depth: 12 3/4″
Front Height: 10 1/4″
Rear Height: 7″
(Vb) Air Volume per Sub: .6″
Mounting Depth: 6 13/16″
Hole Openings: 2 – 10″ or 2 – 12″
Manufacturer: Audio Enhancers

Additional information


Hole Size




Custom Opening


2 reviews for 89-99 Chevy / GMC Extended Cab – Dual 10″ or 12″ Box

  1. Jason Ridgeway Verified Owner

    This is by far the best prefab box made. My JL audio wo’s sound beautiful in this box. Had another box and the difference is night and day. Thanks

  2. Bill Lindsey Verified Owner

    This is the perfect box if you need the cones protected and need to squeeze the largest 12" you can in there. Solid construction and shipping was very fast. After 2 months of really pushing it with some HO 12" subs and a JL Audio Slash amp it still refuses to leak. Be aware, you do lose 2" of leg room though.

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