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Rockford Fosgate RM112D2 Prime Marine 12" Dual 2-Ohm Subwoofer Marine-Grade Bass, 12" Output, White Finish
Product Overview
The Rockford Fosgate RM112D2 is a white 12" dual 2-ohm subwoofer from the Prime marine range, purpose-built for marine watercraft and powersport applications. Stepping up in driver diameter from the RM110 10" range, the RM112D2 delivers more cone surface area for greater low-frequency output and deeper bass extension while maintaining the complete Prime marine-grade construction and weatherproofing specification shared across the RM1 marine subwoofer range.
Like the RM110D2B, the RM112D2 features 100% UV stable ASA injection-moulded plastic parts, UV and salt-fog resistant Santoprene surround, injection-moulded mineral-filled polypropylene cone with UV inhibitors, moisture and fatigue-resistant Aramid fibre spider, ultra-flexible silicone lead wire, and proprietary corrosion-resistant spring-loaded push terminals all purpose-selected for the UV intensity, salt fog, moisture, and vibration conditions of Australian watercraft and powersport environments. Dual 2-ohm voice coils wire in parallel for a 1-ohm load or in series for a 4-ohm load. Compatible with sealed, vented, and infinite baffle installations. Colour-matched white grille and removable trim ring included.
Key Specifications
- Driver size: 12"
- Voice coil configuration: Dual 2-ohm (DVC)
- Wiring options: 1 ohm (parallel) / 4 ohm (series)
- Enclosure compatibility: Sealed / vented / infinite baffle
- Plastic parts: 100% UV stable ASA injection-moulded
- Cone: Injection-moulded mineral-filled polypropylene with UV inhibitors
- Surround: UV and salt-fog resistant Santoprene
- Spider: Moisture, tear and fatigue-resistant Aramid fibre
- Lead wire: Ultra-flexible fully insulated silicone
- Input terminals: Proprietary corrosion-resistant spring-loaded push terminals
- Grille: Colour-matched white (included)
- Trim ring: Removable (included)
- Colour: White
- True marine-grade compliant
- Power handling: Confirm with supplier
- Frequency response: Confirm with supplier
- Sensitivity: Confirm with supplier
- Mounting depth: Confirm with supplier
- Cutout diameter: Confirm with supplier
- Shipping weight: Confirm with supplier
Features & Benefits
- 12" driver diameter more cone area for deeper, higher-output bass: The step up from the RM110 10" range. A 12" cone moves significantly more air per unit of excursion than a 10" driver, producing deeper low-frequency extension and higher output levels from the same amplifier power the natural choice for vessel and powersport builds where maximum marine bass performance is the priority.
- Dual 2-ohm voice coils 1-ohm parallel or 4-ohm series wiring: Wired in parallel, the RM112D2 presents a 1-ohm load for maximum power extraction from 1-ohm stable mono amplifiers such as the Rockford Fosgate TM500X1br. Wired in series, it presents a 4-ohm load for specific amplifier configurations. Choose the RM112D2 for 1-ohm stable amplifier pairings; choose the RM112D4 for 2-ohm stable pairings.
- True marine-grade compliance: Meets Rockford Fosgate's true marine-grade standard with every component purpose-selected for UV, salt fog, moisture, and vibration resistance engineered for the outdoor marine environment from the component level up, not adapted from an automotive subwoofer.
- 100% UV stable ASA injection-moulded plastic parts: ASA engineering thermoplastic specifically formulated to resist UV-induced colour fading, surface degradation, and structural embrittlement under prolonged direct sun exposure on Australian watercraft and powersport vehicles.
- UV and salt-fog resistant Santoprene surround: Santoprene thermoplastic rubber maintains consistent mechanical compliance under UV radiation and salt fog exposure where conventional rubber surrounds crack and foam surrounds degrade essential for long-term subwoofer performance and reliability on the water.
- Injection-moulded mineral-filled polypropylene cone with UV inhibitors: Mineral filling increases cone stiffness and dimensional stability, resisting moisture absorption and maintaining pistonic accuracy at high excursion levels. UV inhibitors prevent polymer chain degradation under direct sun exposure.
- Moisture, tear and fatigue-resistant Aramid fibre spider: Resists moisture absorption that would alter compliance characteristics in wet marine environments, providing superior tear and fatigue resistance during high-excursion 12" subwoofer use.
- Ultra-flexible fully insulated silicone lead wire: Maintains flexibility across the wide temperature range of Australian outdoor environments, resisting cracking and hardening in conditions where standard PVC insulation degrades over time.
- Proprietary corrosion-resistant spring-loaded push terminals: Fast, tool-free wiring connection with corrosion resistance appropriate for saltwater and estuarine environments where standard binding post materials accelerate galvanic corrosion over time.
- Sealed, vented, and infinite baffle installation compatibility: Confirmed compatible with free-air (infinite baffle) installation allowing direct mounting in vessel transom panels and powersport enclosures where a dedicated subwoofer box is impractical, consistent with the full RM1 marine subwoofer range.
- White finish with colour-matched grille: White finish and 100% UV stable colour-matched white grille integrate cleanly with white vessel interiors and trim common on Australian watercraft. The white finish maintains its colour integrity under prolonged UV exposure due to the ASA material specification.
- Available in black or white: The RM112D2 is the white finish variant. A black finish version is available separately confirm part number with your supplier.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | RM112D2 |
| Brand | Rockford Fosgate |
| Driver Size | 12" |
| Colour | White |
| Voice Coil Configuration | Dual 2-ohm (DVC) |
| Wiring Options | 1 ohm (parallel) / 4 ohm (series) |
| Enclosure Compatibility | Sealed / vented / infinite baffle |
| Plastic Parts | 100% UV stable ASA injection-moulded |
| Cone | Injection-moulded mineral-filled polypropylene with UV inhibitors |
| Surround | UV and salt-fog resistant Santoprene |
| Spider | Moisture, tear and fatigue-resistant Aramid fibre |
| Lead Wire | Ultra-flexible fully insulated silicone |
| Input Terminals | Proprietary corrosion-resistant spring-loaded push terminals |
| Grille | Colour-matched white (included) |
| Trim Ring | Removable (included) |
| Marine Grade | True marine-grade compliant |
| Power Handling | Confirm with supplier |
| Frequency Response | Confirm with supplier |
| Sensitivity | Confirm with supplier |
| Mounting Depth | Confirm with supplier |
| Cutout Diameter | Confirm with supplier |
| Shipping Weight | Confirm with supplier |
| Warranty | Confirm with supplier |
Compatible With
- Rockford Fosgate TM500X1br Power Marine 500W mono amplifier (1-ohm parallel wiring natural pairing)
- Rockford Fosgate PM300X1 Punch Marine 300W mono amplifier (4-ohm series wiring confirm power output at 4 ohms with supplier)
- Sealed, vented, and infinite baffle marine enclosures confirm recommended enclosure volume with Rockford Fosgate documentation before building a sealed or vented box
- Marine vessels: bow riders, ski boats, pontoons, fishing boats, and tinnies with transom or hull subwoofer mounting locations
- Powersport applications: UTVs and side-by-sides with under-seat or roll-cage subwoofer enclosures
- RM112D4 (dual 4-ohm variant) for 2-ohm stable amplifier pairings
- RM110D2B (10" dual 2-ohm black variant) for applications where 12" diameter is too large
- Black finish variant available separately confirm part number with supplier
Frequently Asked Questions
What is the difference between the RM112D2 and the RM110D2B? Both use dual 2-ohm voice coils with identical 1-ohm parallel and 4-ohm series wiring options, and share the same complete Prime marine-grade construction. The key difference is driver size the RM112D2 is a 12" subwoofer delivering more cone area, deeper bass extension, and higher output than the 10" RM110D2B. Choose the RM112D2 when maximum marine bass performance is the priority and 12" diameter fits the installation space; choose the RM110D2B when 10" is the maximum available diameter.
What impedance does the RM112D2 present to the amplifier? The RM112D2 has dual 2-ohm voice coils. Wired in parallel, it presents a 1-ohm load suitable for 1-ohm stable mono amplifiers such as the TM500X1br. Wired in series, it presents a 4-ohm load. Confirm your amplifier's stable impedance rating before wiring.
Can the RM112D2 be installed in infinite baffle without an enclosure? Yes. The RM112D2 is confirmed compatible with infinite baffle (free-air) installation, allowing direct mounting in vessel transom panels and powersport enclosures where a dedicated subwoofer box is impractical. Confirm the recommended free-air parameters with Rockford Fosgate documentation before installing in this configuration.
Is the white finish UV stable on Australian watercraft? Yes. The white finish is produced using 100% UV stable ASA injection-moulded plastic parts specifically formulated to resist colour fading, surface degradation, and structural embrittlement under the intense UV exposure common on Australian watercraft maintaining the white finish integrity over the product's outdoor service life.
What is the difference between the RM112D2 and RM112D4? Both are 12" Prime marine subwoofers in the same white finish with identical construction and marine-grade compliance. The RM112D2 has dual 2-ohm coils (1-ohm parallel / 4-ohm series) for 1-ohm stable amplifier pairings. The RM112D4 has dual 4-ohm coils (2-ohm parallel / 8-ohm series) for 2-ohm stable amplifier pairings. Choose based on your amplifier's stable impedance rating.
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