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SKU: XSUB12-MKII
OSD XSUB12 MKII 12" In-Ground Subwoofer 600W Outdoor Burial Rated XSUB12
Bring true low-end to your backyard with the OSD XSUB12 MKII, a 12-inch passive in-ground subwoofer built to disappear into your landscape and stand up to the elements. The enclosure buries underground so only the weather-resistant vent shows above grade, and the vent can be primed and painted to blend into any setting. Its 360° omnidirectional design spreads smooth, even bass across patios, pools, gardens, and outdoor entertainment areas, filling the space with the depth that outdoor speakers alone can’t produce.
The MKII is a reliability-focused upgrade of the popular XSUB12. Enhanced voice-coil ventilation improves heat dissipation and long-term power handling, upgraded internal crossover components increase current-handling capability, and an improved cable-entry seal helps keep moisture out for years of dependable, buried operation. Reinforced packaging protects the unit in transit. Backed by a 5-year limited warranty, the XSUB12 MKII is built to keep performing season after season.
With a durable 12" polypropylene cone and rubber surround (not foam), 300W RMS / 600W peak power handling, and an 8-ohm passive design, the XSUB12 MKII pairs with a dedicated subwoofer amplifier to add rich, room-filling bass to any outdoor audio system. Use one to anchor a patio, or two on opposite sides of a larger space for fuller, more even coverage.
Features & Benefits
- Deep, even outdoor bass, 12" polypropylene cone with rubber surround for lasting performance in heat, cold, and humidity
- 360° omnidirectional coverage spreads low-frequency sound evenly across patios, pools, and gardens
- Buried in-ground design, only the weather-resistant vent shows; prime and paint it to blend into your landscape
- Upgraded for reliability (MKII): enhanced voice-coil ventilation for better heat dissipation and power handling
- Upgraded crossover with higher current-handling components for extended service life
- Improved cable-entry seal helps prevent water intrusion in buried installations
- 300W RMS / 600W peak, 8-ohm passive, pairs with a dedicated subwoofer amplifier
- Use one, or two in parallel for larger areas and more even bass coverage
- Reinforced packaging for safe transit
- Includes silicone-filled waterproof wire connectors
- Backed by a 5-year limited warranty
Why Add an In-Ground Subwoofer?
Outdoor speakers roll off in the low end because there are no room boundaries to reinforce bass. Adding an in-ground subwoofer restores that missing foundation. You feel the depth without cranking the volume, and your satellite speakers can focus on the mids and highs they do best. The result is a fuller, more balanced outdoor sound system, with the sub hidden discreetly in the landscape.
Do I Need a Subwoofer Amplifier?
Yes. The XSUB12 MKII is a passive subwoofer and requires a dedicated subwoofer amplifier. It does not connect directly to a receiver’s RCA/LFE output. For best performance and longevity, pair it with a mono subwoofer amplifier rated around 250–500W RMS at 8 ohms (for example, the OSD SMP500). To run two subwoofers, wire them in parallel for a 4-ohm load and use an amplifier rated for 4-ohm operation. Set the low-pass filter between roughly 80–120 Hz to blend with your landscape speakers.
Installation Tips
- Place the subwoofer within about 20 feet of the main listening area for best output.
- Locate underground utilities (call 811) before digging.
- Do not install below the water line. If the hole fills with water while digging, relocate or add a gravel drainage bed, and keep the vent above grade and clear of debris.
- Use equal wire lengths when installing two subs; use silicone-filled connectors and verify polarity.
Technical Specifications
- Speaker Type: 12" Burial-Rated In-Ground Outdoor Subwoofer
- Woofer: 12" Polypropylene Cone with Rubber Surround
- Power Handling: 300W RMS / 600W Peak
- Recommended Amplifier: 250–500W RMS mono subwoofer amplifier at 8 Ω
- Frequency Response: 20 Hz – 150 Hz (±3 dB)
- Sensitivity: 84 dB (1W/1m)
- Impedance: 8 Ohms
- Coverage: 360° Omnidirectional
- Enclosure: Weather-Resistant, Burial-Rated
- Dimensions (H × W × D): 24.5" × 24" × 13.75"
- Weight: 31 lbs
- Warranty: 5-Year Limited
Warning: California's Proposition 65
Warning:
This product can expose you to chemicals, including vinyl chloride, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.