Stealthbox SB-GM-SLVCC4/12TW3 - Subwoofer JL Audio - Free user manual and instructions
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| Product Type | Powered Subwoofer Enclosure |
| Brand | JL Audio |
| Model | Stealthbox SB-GM-SLVCC4/12TW3 |
| Application | 2014-2018 Chevrolet Silverado / GMC Sierra Crew Cab (under rear seat) |
| Subwoofer Type | 12TW3-D4 (thin-line, dual 4-ohm voice coils) |
| Impedance | 2 ohms or 8 ohms (configurable) |
| Power Handling (RMS) | 400 watts |
| Power Handling (Peak) | 800 watts |
| Frequency Response | 20-200 Hz (+/- 3 dB) |
| Enclosure Type | Sealed fiberglass with carpet finish |
| Enclosure Material | Hand-laid fiberglass |
| Grille | Heavy-duty steel mesh grille |
| Dimensions (Width x Depth x Height) | 47.0 x 13.5 x 7.5 inches |
| Net Weight | 32 lbs |
| Finish | Black carpet (matches factory interior) |
| Installation | Direct bolt-in; no drilling required for most models |
| Wiring Harness Included | Plug-and-play adapter for factory subwoofer harness (if equipped) |
| Amplifier Requirement | External mono amplifier recommended (300-600W at 2-4 ohms) |
| Warranty | 2 years (JL Audio parts and labor) |
| Cleaning Instructions | Wipe with dry cloth; avoid liquid cleaners |
| Safety Features | Rubber mounting feet to prevent sliding; fuse holder on power lead |
| Repairability | Subwoofer removable; enclosure not user-serviceable |
| Included Parts | Stealthbox enclosure, grille, mounting hardware, wiring harness |
Frequently Asked Questions - Stealthbox SB-GM-SLVCC4/12TW3 JL Audio
What vehicles is the Stealthbox SB-GM-SLVCC4/12TW3 designed for?
This Stealthbox is designed for 2014-2018 Chevrolet Silverado and GMC Sierra Crew Cab models with under-seat storage. It fits behind the rear seat without losing passenger space.
Can I install this subwoofer without an external amplifier?
No, the Stealthbox is a passive enclosure and requires an external amplifier. JL Audio recommends a mono amplifier rated between 300-600 watts RMS at 2-4 ohms.
What is the depth of the enclosure and will it clear the seat?
The enclosure depth is approximately 7.5 inches. It is designed to fit under the rear seat of compatible trucks without impeding legroom or seat fold-down.
Does the Stealthbox include a subwoofer grille?
Yes, it includes a heavy-duty steel mesh grille to protect the subwoofer from debris.
What is the impedance of the subwoofer?
The subwoofer has dual 4-ohm voice coils, allowing wiring to 2 ohms or 8 ohms total impedance.
Is wiring included for factory trucks with the optional Bose system?
Yes, the Stealthbox includes a plug-and-play harness that connects to the factory Bose subwoofer wiring (if equipped). Some models may require a line-out converter.
How do I clean the Stealthbox enclosure?
Use a dry or slightly damp cloth to wipe the carpet. Avoid using any liquid cleaners or solvents that could damage the finish.
Can I remove the subwoofer for repair?
Yes, the subwoofer is secured with screws and can be removed for service. The fiberglass enclosure is not user-repairable.
What is the power handling of the included subwoofer?
The 12TW3-D4 subwoofer handles 400 watts RMS and 800 watts peak power.
Does the Stealthbox come fully assembled?
Yes, it comes fully assembled with the subwoofer installed, grille attached, and wiring harness ready to connect.
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USER MANUAL Stealthbox SB-GM-SLVCC4/12TW3 JL Audio
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Product information
Brand : JL Audio
Model : Stealthbox SB-GM-SLVCC4/12TW3
Category : Subwoofer