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Automotive Passive Subwoofer Enclosures

Automotive Passive Subwoofer Enclosure Collection

Loaded subwoofer enclosures come in Passive or Active styles. Passive enclosures, or boxes, require an additional amplifier to produce sound while Active enclosures have amplifiers built into them and are self contained all-in-one systems.

Subwoofer drivers, also know as subs, are specific only to the lowest frequencies of the sound spectrum, and are the largest drivers in any car stereo. They are generally found in sizes of 8″ – 12″ diameters. Subs move massive amounts of air creating large pressure waves. These large pressure waves give that bottom end punch you expect from your kick drum, the undeniable funk of a bass guitar and the earthshaking bump of a house beat. 

The frequency range of a subwoofer generally covers the first 2 octaves of the sound spectrum, also known as the lows. Subwoofers require their own mounting structure called a sub box. Sub boxes are built to create negative pressure on the sub to help move their large diameter cones back and forth for accurate reproduction of low end frequencies. Custom subwoofer boxes are built to meet certain cubic air space specifications of sub drivers and are sometimes custom built to fit under seats or other hidden areas to maximize the use of space in the vehicle. JL Audio’s Stealthbox's are custom designed to fit many vehicles while minimizing the footprint needed to be installed in your car.

RMS vs. MAX power: The RMS rating of any speaker driver is the continuous power rating that the speaker is designed to withstand at a maximum continued volume rating. The RMS rating is the only number to go by when pairing your speakers with an amplifier. As an example a speaker with a 100Watt, or 100W for short, RMS rating and a 300-Watt Max rating is ultimately a 100 Watt speaker. The Max rating is the temporary spikes in voltage that the speaker can handle. A 100-Watt RMS / 300-Watt Max speaker is going to outperform a 100W RMS / 250W Max speaker at higher volumes, but may not be the more detailed reference speaker.

Ohms: The Ohm rating, or resistance rating, of a speaker is an essential part of a well balanced car stereo system. Many JBL factory speaker systems have 2ohm drivers. Most aftermarket speakers are 4ohm drivers. Replacing these types of factory speakers may require a wiring bypass of the factory amplifier.

Driver resistance ratings are essential when pairing subwoofer and speaker drivers with amplifiers. An amplifier that is 750W @ 2ohms might only generally be 500W or less @ 4ohms. When purchasing a subwoofer driver the correct pairing of a subwoofer’s RMS wattage and Ohm ratings with an amplifier’s output power rating is absolutely essential.

Frequency Response: Frequencies are measured in Hertz or Hz for short. The frequency response of speaker drivers will generally fall between 20Hz and 22kHz. At 20Hz the sound spectrum begins. Every time you double your frequency you move up one octave in scale. 20-Hertz to 40-Hertz covers the first Octave, 40Hz to 80Hz covers the next octave and so on. Subwoofer drivers are generally tuned to crossover at 80 Hertz. This can depend on the subwoofer type and the type of music you listen to.

4 products

  • 300W 12" Subwoofer Enclosure, 2Ω or 4Ω Configuration : Kicker 44TCWC12 300W 12" Subwoofer Enclosure, 2Ω or 4Ω Configuration : Kicker 44TCWC12 front side view.

    Kicker 44VCWC12 : 300W 12" Subwoofer Enclosure, 2Ω or 4Ω Configuration

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    12-Inch 300-Watt Subwoofer Enclosure, 2-Ohm or 4-Ohm Final Impedance This CompC 12" loaded loaded sub box is custom-sized to optimize subwoofer performance. This enclosure is covered in black carpet with yellow embroidery, and comes with spring loaded speaker terminals for an easy connection of your subwoofer wire.  This thin 2Ω or 4Ω 12-inch enclosure works best with 300 watts of RMS amplified power. Specifications Subwoofer (in, cm) 12, 30 Impedance (Ohms) 2 Recommended Amplifier Power (watts RMS) 300 Peak Power (watts, per ANSI/CTA-2031-A) 600 Sensitivity (dB 1w/1m) 95.3 Box Top Depth (in, cm) 11 7/16, 29 Box Bottom Depth (in, cm) 14 5/8, 37.2 Box Height (in, cm) 16, 40.6 Box Width (in, cm) 17 1/2, 44.5 Kicker CompC Subwoofer Enclosure Manual

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    $229.99

  • Kicker 48TRTP122 : 500W Dual 12" Thin Subwoofer Enclosure Kicker 48TRTP122 : 500W Dual 12" Thin Subwoofer Enclosure, left side.

    Kicker 48TRTP122 : 500W Dual 12" Thin Subwoofer Enclosure

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    Dual 12-Inch Thin Subwoofer Enclosure, 500-Watt RMS, 2-Ohm The Kicker CompRT series down-firing 12-inch subwoofer enclosure comes loaded with a passive reFLEX™ subwoofer and Kicker CompRT sub, then carpeted and loaded with a single 2Ω terminal.  Covered in stylish black carpeting and built with thick MDF, these tough enclosures take serious power without taking up needed space. The TRTP 12-inch subwoofer enclosure works best with 500-watts of recommended power. Specifications TYPE: thin-profile WOOFER SIZE (in, cm): 12, 30 IMPEDANCE (Ohms): 2 Recommended Amplifier Power (watts RMS) 500 Peak Power (watts, per ANSI/CTA-2031-A) 1000 SENSITIVITY (dB 1w/1m): 98 BOX TOP DEPTH (in, cm): 14-5/8, 37 BOX BOTTOM DEPTH (in, cm): 14-5/8, 37 BOX HEIGHT (in, cm): 6-1/8, 15.6 BOX WIDTH (in, cm): 27-1/2, 70 Kicker TRTP Subwoofer Enclosure Manual

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    $329.99

  • JL Audio CS112TG-TW3 : 12" Thin Subwoofer Enclosure - 400W RMS 2Ω JL Audio CS112TG-TW3 : 12" Thin Subwoofer Enclosure - 400W RMS 2Ω, side view.

    JL Audio CS112TG-TW3 : 12" Thin Subwoofer Enclosure, 400W RMS 2Ω

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    PowerWedge-Series 12-Inch 400-Watt Enclosed Subwoofer System, 2Ω Sealed Enclosure In this sealed Truck PowerWedge™ subwoofer system, JL harnesses the performance of the 12TW3 to deliver amazing sub-bass from an enclosure that is only 7 in. (178 mm) deep at its base and 4.5 in. (114 mm) at the top. This enclosure design has been carefully engineered to the optimum sealed enclosure alignment for the 12TW3 and has been fine-tuned through extensive real-world listening. This subwoofer system is shipped wired, loaded and ready to connect via a five-way binding post terminal. Finish: Black, high-grade automotive carpet with "JL AUDIO" embroidered in silver on the front baffle. A steel mesh grille is included to protect the subwoofer driver. Construction: CNC-Cut High-Grade MDF Recommended amplifier power: 100 - 400WNominal Impedance: 2 Ω General Specifications System Nominal Impedance 2 Ω Grille Included Black Steel Mesh Finish Black carpet Enclosure Type Sealed, truck enclosure Continuous Power Handling (RMS) 400 W Physical Specifications External Width (W) 21.75 in / 537 mm External Height (H) 14.625 in / 371 mm External Depth (D1) 7 in / 178 mm External Top Surface Depth (D2) 4.5 in / 114 mm Net Weight 29 lb / 13.2 kg JL Audio CS112TG-TW3 Brochure

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    $549.99

  • JL Audio CLS110RG-W7AE : 10" Subwoofer Enclosure - 750W RMS 3Ω JL Audio CLS110RG-W7AE : 10" Subwoofer Enclosure side view.

    JL Audio CLS110RG-W7AE : 10" Subwoofer Enclosure, 750W RMS 3Ω

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    ProWedge-Series 10-Inch 750-Watt Enclosed Subwoofer System, 3Ω Sealed Enclosure For those who seek the ultimate in compact-enclosure sub-bass fidelity, we offer this sealed ProWedge™ system, in which the superb performance capabilities of the W7AE subwoofer driver are harnessed within a compact, sealed enclosure. This system has it all: extension, impact, detail and smooth response... at any listening level. This enclosure design has been carefully engineered to the optimum sealed enclosure alignment for the 10W7AE-3 and has been fine-tuned through extensive real-world listening. This subwoofer system is shipped wired, loaded and ready to connect via a five-way binding post terminal. The angled-back design saves precious cargo space by allowing the enclosure to fit tightly against the back of a vehicle's rear seat. Finish: Black, high-grade automotive carpet, with gloss-black laminated decorative front baffle trim. Three solid aluminum bars provide stylish and rugged woofer protection. Construction: CNC-Cut High-Grade MDF Recommended amplifier power: 300 - 750WNominal Impedance: 3 Ω General Specifications Continuous Power Handling (RMS) 750 W System Nominal Impedance 3 Ω Enclosure Type Sealed, rear-firing design Finish Black carpet / laminate Grille Included Aluminum Bar Grille Physical Specifications External Width (W) 17.75 in / 451 mm External Height (H) 14.625 in / 371 mm External Depth (D1) 16.625 in / 422 mm External Top Surface Depth (D2) 11.50 in / 292 mm Net Weight 61.2 lb / 27.77 kg JL Audio CLS110RG-W7AE Brochure

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    $1,399.99

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