Description
Included in this kit
This bundle includes a JL Audio Stealthbox® enclosed subwoofer for 2024-up Jeep Wrangler Unlimited, driver side - SBX-J-JL4D24/12TW3, and a JL Audio RD500/1 500W Class D Monoblock Subwoofer Amplifier.
1x JL Audio Stealthbox® enclosed subwoofer for 2024-up Jeep Wrangler Unlimited, driver side - SBX-J-JL4D24/12TW3 - (SBX-J-JL4D24/12TW3)
JL Audio Stealthbox® Enclosed Subwoofer for Jeep Wrangler Unlimited (2024+)
Driver-Side Installation • 12" TW3 Thin-Line Subwoofer
Designed specifically for 2024-up Jeep Wrangler Unlimited 4-door models, this JL Audio Stealthbox® subwoofer system combines advanced thin-line subwoofer technology with a precision, form-fitting enclosure. The result is powerful, accurate sub-bass performance without sacrificing valuable cargo space. The enclosure mounts securely above the driver-side rear wheel well and includes a rugged steel-mesh grille to protect the subwoofer when hauling gear. :contentReference[oaicite:0]{index=0}
Overview
Powerful Bass Without Losing Cargo Space
This Stealthbox® system houses a single 12-inch TW3 thin-line subwoofer in a side-firing, vehicle-specific enclosure engineered for the Jeep Wrangler Unlimited. By using JL Audio’s thin-line subwoofer technology, the enclosure delivers deep, controlled bass while maintaining a compact footprint that preserves interior usability.
- Designed exclusively for 2024-up Jeep Wrangler Unlimited (4-door).
- Mounts using existing factory mounting points.
- Side-firing enclosure optimized for interior placement.
Vehicle-specific fitment delivers strong bass with an OEM-style installation.
Subwoofer Technology
TW3 Thin-Line Performance
The included TW3 thin-line subwoofer is engineered to provide outstanding low-frequency performance from a shallow mounting depth. Rated for 400 watts of power handling, it pairs easily with a wide range of JL Audio amplifiers while maintaining clarity and control.
- 12" TW3 thin-line subwoofer.
- 400-watt power handling capability.
- 2-ohm wired impedance.
Design & Protection
Built for Real-World Use
| Application | 2024-Up Jeep Wrangler Unlimited (4-Door) |
| Mounting Location | Driver-Side Rear Wheel Well |
| Subwoofer | 12" TW3 Thin-Line |
| Power Handling | 400 Watts |
| Wired Impedance | 2 Ohms |
| Enclosure Type | Side-Firing, Vehicle-Specific |
| Included Protection | Steel-Mesh Grille |
| Country of Origin | Made in the U.S.A. with Global Components |
1x JL Audio RD500/1 500W Class D Monoblock Subwoofer Amplifier - (RD500/1)
RD500/1
Monoblock Class D Subwoofer Amplifier, 500 W x 1 @ 2 Ω / 250 W x 1 @ 4 Ω - 14.4V
Born to produce a whopping 500 watts into 2 ohms (14.4V, 1% THD), the RD500/1 amplifier was engineered to generate tons of pure subwoofer bliss from a sleek, ultra-compact chassis. The secret behind its power proficiency is our proprietary NexD™ switching technology, which delivers large amounts of power output with precise efficiency and ultra-low distortion.
For your convenience, the RD500/1’s controls are located on top of the amplifier, beneath a protective cover, with all connections found along one side of its chassis. Signal processing features include a 12 dB / octave low-pass filter, with continuously variable frequency selection from 50-500 Hz, and a variable bass boost EQ. Dual-range, differential-balanced inputs are also on-hand, capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.
The RD500/1 is also equipped with an onboard LED-clipping indicator. This all-new, innovative feature lets you easily set your amplifier’s input sensitivity setting, quickly and accurately, with no special equipment needed. The RD500/1 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition. With the addition of an RBC-1 remote level control (sold separately), you can control the subwoofer output directly from the driver’s seat.
Rated Continuous (RMS) Power @ 14.4 V
| @ 4 Ω | 250 W RMS x 1 |
| @ 3 Ω | 350 W RMS x 1 |
| @ 2 Ω | 500 W RMS x 1 |
| @ 1.5 Ω | N/A |
Rated Continuous (RMS) Power @ 12.5 V
| @ 4 Ω | 225 W RMS x 1 |
| @ 3 Ω | 300 W RMS x 1 |
| @ 2 Ω | 400 W RMS x 1 |
| @ 1.5 Ω | N/A |
General Specifications
| Frequency Response | 7 Hz - 500 Hz (+0, -1dB) |
| S/N Ratio, referred to highest rated power | >80 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| S/N Ratio, referred to 1 W | >60 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| Damping Factor @ 4 Ω | >1000 / 50 Hz |
| Damping Factor @ 2 Ω | >500 / 50 Hz |
| THD+N @ Rated Power | <1% @ 2 Ω per Ch. |
| Input Voltage Range @ RCA Inputs | Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High) |
| Min.Copper Power / Ground Wire Gauge | 4 AWG wire |
| Fuse Rating | 50 A (AFS, AGU or MaxiFuse™) |
Signal Processing
| Filter Mode(s) | Low-Pass only |
| Filter Slope(s) | 12 dB/octave |
| Filter Frequency Range | 50 Hz - 500 Hz |
| Detented, Calibrated Filter Freq. Potentiometer | No |
| Filter Defeat Function | No |
| Infrasonic Filter | 30 Hz, defeatable |
| Bass Boost EQ | Yes |
| Output Polarity Switch | No |
| Remote Subwoofer Level Control | Optional (RBC-1) |
| Remote Bass EQ Boost Control | No |
| Pass-Through Preamp Output | Buffered |
Physical Specifications
| Height (H) | 2.13 in / 54 mm |
| Width (W) | 9.78 in / 372 mm |
| Depth (D) | 6.96 in / 177 mm |