--- product_id: 4544273 title: "Dual 12\" Underseat Downfire Subwoofer Box for Chevy/GMC XCab" brand: "q power" price: "¥169378" currency: JPY in_stock: true category: "Q Power" url: https://www.desertcart.jp/products/4544273-dual-12-underseat-downfire-subwoofer-box-for-chevy-gmc-xcab store_origin: JP region: Japan --- # Compact 51.5"W x 15.25"H underseat fit Dual 12" subs for booming bass Heavy-duty 5/8" MDF for durability Dual 12" Underseat Downfire Subwoofer Box for Chevy/GMC XCab **Brand:** q power **Price:** ¥169378 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate your truck’s vibe with bass that commands attention! ## Quick Answers - **What is this?** Dual 12" Underseat Downfire Subwoofer Box for Chevy/GMC XCab by q power - **How much does it cost?** ¥169378 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/4544273-dual-12-underseat-downfire-subwoofer-box-for-chevy-gmc-xcab) ## Best For - q power enthusiasts ## Why This Product - Trusted q power brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Installation:** Terminal cup connectors simplify wiring—get your sound system up and booming in no time. - • **Optimized Acoustic Chambers:** Dual-chamber layout with 0.95 cu. ft. airspace per sub ensures crystal-clear, powerful low frequencies. - • **Tailored Truck Bass Upgrade:** Custom-fit for 1996-2006 Chevy & GMC XCab Classics—no guesswork, just perfect fit. - • **Space-Smart Underseat Design:** Low-profile downfire enclosure preserves cabin space while delivering deep, immersive bass. - • **Rugged Build for Road Warriors:** 5/8" MDF with charcoal carpet finish resists vibration and wear, built to last through every drive. ## Overview The QPower Dual 12in Underseat Downfire Subwoofer Enclosure is a precision-engineered audio upgrade designed exclusively for 1996-2006 Chevy Silverado and GMC Sierra XCab Classic trucks. Featuring dual 12-inch subwoofers housed in a durable 5/8" MDF enclosure with a compact underseat footprint, it delivers deep, controlled bass without sacrificing cabin space. Its dual-chamber design and downfire layout optimize sound clarity and power, making it the ultimate choice for serious truck audio enthusiasts seeking a seamless blend of performance and fit. ## Description The custom-made QPower Dual 12-Inch Underseat Subwoofer Box is designed for 1999–2006 GMC and Chevy Silverado Extended Cab trucks. Our speaker system enclosure delivers a significant upgrade to your vehicle’s audio performance. With an 11-inch cutout diameter, it is built to house a pair of 12-inch speakers, allowing you to enjoy full, dynamic sound from a setup tailored precisely to your truck’s interior. The enclosure’s low-profile construction slides securely beneath the rear bench, and its downward-firing design helps project rich, evenly distributed bass throughout the cabin. To simplify installation, the box includes terminal cup connectors that make establishing secure speaker connections quick and straightforward. The dual-chamber design ensures each subwoofer operates within its own optimized space, contributing to clearer and more balanced audio. Measuring 51.5 in (W) × 15.25 in (H) × 7.25 in (D) with a 5.5-inch mounting depth, the enclosure offers 0.95 cubic feet of airspace, giving your subwoofers the room they need to perform effectively. Constructed from durable 5/8-inch MDF and finished with a charcoal carpet covering, this enclosure maintains excellent rigidity, even during heavy bass output. Its solid build minimizes unwanted resonance, allowing your system to deliver cleaner, more accurate low-frequency response. With its thoughtful engineering and sturdy materials, this subwoofer box provides a reliable, high-performing foundation for your truck’s upgraded audio system. ## Features - Custom X-Cab Classic Fit: Dual 12" underseat subwoofer enclosure compatible with 1996-2006 Chevy Silverado XCab and GMC Sierra XCab Classic trucks; Not compatible with Crew Cab models - Durable Construction: Heavy-duty 5/8" MDF enclosure finished in charcoal carpeting for lasting performance - Convenient Underseat Fit: Compact downfire design installs cleanly under the rear seat and preserves cabin space - Optimized Audio Performance: 0.95 cu. ft. air space per sub, 5.5" mounting depth, and downfire layout deliver deep, controlled low-frequency output - Trusted Q Power Brand: Known for precision-fit enclosures and dependable audio solutions, Q Power delivers performance-driven designs for serious audio builds ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00GUKIBQO | | Additional Features | Bass Boost | | Antenna Location | construction | | Audio Driver Size | 12 inches | | Audio Driver Type | Dynamic Driver | | Audio Output Mode | Stereo | | Best Sellers Rank | #178,171 in Electronics ( See Top 100 in Electronics ) #447 in Car Subwoofer Boxes & Enclosures | | Brand | Q Power | | Built-In Media | Speaker cables | | Color | Charcoal | | Compatible Devices | Car | | Compatible with Vehicle Type | Car | | Connectivity Protocol | wired | | Connectivity Technology | wired | | Control Method | Touch | | Customer Package Type | FFP | | Customer Reviews | 4.0 4.0 out of 5 stars (138) | | Enclosure Material | Engineered Wood | | Is Waterproof | FALSE | | Item Dimensions D x W x H | 7.25"D x 51.5"W x 15.25"H | | Manufacturer | QPower | | Model Name | QPower GMC Chevy Silverado Ext Cab '99-06 Dual Underseat Two 12" Subwoofer Box | | Model Number | 35c8c757-6776-44fd-b2a7-d72eb5329846 | | Mounting Type | Under-Seat | | Number Of Circuits | 1 | | Number of Audio Channels | 2 | | Number of Items | 2 | | Power Source | Corded Electric | | Processor Count | 1 | | Speaker Maximum Output Power | 500 watts | | Speaker Size | 12 inches | | Speaker Type | Subwoofer | | Specific Uses For Product | In-Car Audio Systems | | Subwoofer Connectivity Technology | Wired | | Subwoofer Diameter | 12 inches | | UPC | 845687515481 813177020678 | | Unit Count | 2 Count | | Warranty Type | Extended | | Wireless Technology | Bluetooth | | Woofer Diameter | 12 inches | ## Product Details - **Audio Output Mode:** Stereo - **Brand:** Q Power - **Connectivity Technology:** wired - **Mounting Type:** Under-Seat - **Speaker Maximum Output Power:** 500 watts ## Images ![Dual 12" Underseat Downfire Subwoofer Box for Chevy/GMC XCab - Image 1](https://m.media-amazon.com/images/I/71COBPiS88L.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/4544273-dual-12-underseat-downfire-subwoofer-box-for-chevy-gmc-xcab](https://www.desertcart.jp/products/4544273-dual-12-underseat-downfire-subwoofer-box-for-chevy-gmc-xcab) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-24*