Stealthbox SB-F-FLX/10W3v3 - Subwoofer JL Audio - Free user manual and instructions
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| Product Type | Pre-loaded Subwoofer Enclosure |
| Brand | JL Audio |
| Model | Stealthbox SB-F-FLX/10W3v3 |
| Application | Ford Flex (custom fit) |
| Subwoofer Size | 10 inches |
| Subwoofer Model | 10W3v3 |
| Voice Coil Configuration | Dual 4-ohm |
| Final Impedance | 2 ohms (parallel wiring) or 8 ohms (series) |
| Power Handling (RMS) | 300 Watts |
| Power Handling (Peak) | 600 Watts |
| Sensitivity | 84.1 dB (1W/1m) |
| Frequency Response | 20 Hz - 200 Hz |
| Enclosure Type | Sealed |
| Enclosure Material | Fiberglass / MDF composite |
| Finish | Gray carpet (matches OEM) |
| Installation Location | Rear cargo area, behind trim panel |
| Mounting Hardware Included | Yes, brackets and instructions |
| Weight | Approx. 26 lbs (12 kg) |
| Warranty | 1 year (JL Audio) |
| RMS Power Range (Recommended Amplifier) | 200 - 400 Watts RMS @ 2 ohms |
Frequently Asked Questions - Stealthbox SB-F-FLX/10W3v3 JL Audio
What vehicle is the Stealthbox SB-F-FLX/10W3v3 designed for?
This Stealthbox is custom-designed to fit the Ford Flex (2009-2019 model years). It installs behind the rear trim panel on the driver's side, preserving cargo space.
What subwoofer is included in the Stealthbox?
The enclosure comes pre-loaded with a JL Audio 10W3v3 10-inch subwoofer. It is a high-performance driver with a dual 4-ohm voice coil and a robust motor structure.
What is the power handling of the Stealthbox?
The subwoofer has an RMS power handling of 300 watts and a peak power handling of 600 watts. We recommend an amplifier delivering 200-400 watts RMS at the final impedance.
Is the enclosure sealed or ported?
The Stealthbox enclosure is sealed. Sealed enclosures provide tight, accurate bass with a smooth frequency response, ideal for music reproduction.
Can I run the Stealthbox with a factory stereo?
Yes, but you will need an external amplifier and a line-output converter (LOC) or a DSP to tap into factory speaker signals. The subwoofer is not self-powered.
What amplifier should I use with this Stealthbox?
Use an amplifier that delivers 200-400 watts RMS at either 2 ohms or 8 ohms, depending on how you wire the voice coils. A mono subwoofer amplifier is recommended.
How do I install the Stealthbox in my Ford Flex?
Installation involves removing the rear driver-side trim panel, securing the Stealthbox with the included brackets, and connecting the subwoofer wires. Detailed instructions are provided in the user manual.
Does the Stealthbox come with all necessary hardware?
Yes, it includes mounting brackets, screws, and wiring harness specific to the Ford Flex. You may need to supply your own amplifier and signal adapter.
What is the final impedance of the Stealthbox subwoofer?
The 10W3v3 has dual 4-ohm voice coils. Wiring them in parallel gives 2 ohms; wiring in series gives 8 ohms. Match your amplifier's stable load accordingly.
Can I paint or customize the Stealthbox finish?
The enclosure is covered in gray automotive carpet to match the factory trim. You can paint the carpet with spray dye, but avoid thick paints that may flake. Sanding or stripping the carpet is not recommended.
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