10" 4-Ohm Dual Voice Coil Subwoofer 250W RMS, Mica-Injected Polypropylene Cone, StampCast Basket, 12 AWG Compression Terminals. Sealed and Vented Compatible.

Product Overview

The Rockford Fosgate Prime R2D4-10 is a 10" 4-Ohm Dual Voice Coil (DVC) subwoofer rated at 250W RMS the R2 series step up from the R1, adding DVC wiring flexibility and a mica-injected polypropylene cone. The 4-Ohm DVC design provides three wiring options: 2-Ohm (parallel), 8-Ohm (series), or biamped per coil enabling the subwoofer to be matched to a wide range of mono amplifier impedance ratings. Optimised for both sealed and vented enclosures.

The StampCast basket incorporates integrated spider venting for thermal management. The anodized aluminium voice coil former improves heat dissipation compared to plain or polished aluminium. Wiring connections are made via 12 AWG compression terminals a heavier gauge and more secure connection than standard push terminals. Sold as an individual unit.

Key Specifications

• Subwoofer size: 10 inch
• Voice coil configuration: Dual Voice Coil (DVC)
• Impedance: 4-Ohm per coil (2-Ohm parallel / 8-Ohm series / 4-Ohm biamp)
• Power handling (RMS): 250W (confirmed)
• Peak power: Not specified — confirm with Rockford Fosgate
• Sensitivity: Not specified — confirm with Rockford Fosgate
• Frequency response: Not specified — confirm with Rockford Fosgate
• Xmax: Not specified — confirm with Rockford Fosgate
• Voice coil former: Anodized aluminium
• Cone: Mica-injected polypropylene
• Surround: Not specified — confirm with Rockford Fosgate
• Spider: Linear with embedded 16 AWG tinsel leads
• Basket: StampCast with integrated spider venting
• Input terminals: 12 AWG compression terminals
• Trim ring: Integrated PVC
• Enclosure compatibility: Sealed and vented ✓
• Mounting depth: Not specified — confirm with Rockford Fosgate
• Cutout diameter: Not specified — confirm with Rockford Fosgate
• Sold as: Individual unit
• Weight: Not specified — confirm with Rockford Fosgate
• Warranty: Not specified — confirm with Rockford Fosgate

Features & Benefits

• 250W RMS Power Handling — 250W RMS is confirmed — 50W more than the R1 series R1S4-10 — providing greater headroom for amplified installations.
• Dual Voice Coil (DVC) — Three Wiring Configurations — The 4-Ohm DVC design provides three wiring options from a single subwoofer:
  • 2-Ohm: Wire both coils in parallel — most amplifiers produce maximum output at 2-Ohm
  • 8-Ohm: Wire both coils in series — useful for amplifiers with minimum impedance requirements above 4-Ohm
  • 4-Ohm per coil: Connect each coil to a separate amplifier channel for bi-amplification
  This flexibility is the primary advantage of DVC over SVC subwoofers.
• Mica-Injected Polypropylene Cone — Mica particles added to the polypropylene cone compound increase structural stiffness without significant weight increase — producing a stiffer cone that resists flex under dynamic load for more accurate bass reproduction. Polypropylene provides moisture resistance.
• StampCast Basket with Integrated Spider Venting — Rockford Fosgate's StampCast basket construction incorporates integrated ventilation openings around the spider for airflow — cooling the motor structure during sustained operation. The supplier notes this venting feature is "typically reserved for more expensive models," indicating its inclusion is a specification step-up for the R2 price tier.
• Anodized Aluminium Voice Coil Former — The anodizing process on the aluminium former increases its surface emissivity — improving heat radiation away from the former into the surrounding air and magnet gap. More effective thermal management than plain or polished aluminium of equivalent dimensions.
• 12 AWG Compression Terminals — 12 AWG compression terminals accept larger gauge wiring than standard push terminals, provide a more secure physical grip on the wire, and minimise contact resistance at the connection point — all important for a subwoofer carrying the current demanded by 250W RMS operation.
• Linear Spider with Embedded 16 AWG Tinsel Leads — The linear spider provides consistent suspension compliance across the voice coil's excursion range. The 16 AWG tinsel leads are embedded into the spider fabric — securely integrated rather than attached as separate flexible wires, reducing flex fatigue failure at the connection point under sustained high-excursion operation.
• Optimised for Sealed and Vented Enclosures — Confirmed dual enclosure compatibility — sealed for tight, accurate bass; vented for higher efficiency output at the box tuning frequency.

Technical Specs

Compatible With / Goes Well With

Suitable enclosure types:

• Sealed (acoustic suspension) — tight, accurate bass
• Vented (ported/bass reflex) — higher efficiency output

Wiring configurations:

• 2-Ohm load → wire both coils in parallel (most common for maximum amplifier output)
• 8-Ohm load → wire both coils in series
• 4-Ohm per coil → bi-amplified with two amplifier channels

Pairs well with:

• Rockford Fosgate T1000-1BDCP, T1500-1BDCP, or T2500-1BDCP mono amplifiers at the appropriate impedance
• A sealed or vented 10" enclosure built or selected to Rockford Fosgate's recommended volume specifications

Frequently Asked Questions

What does Dual Voice Coil (DVC) mean and how does it help?

A DVC subwoofer has two separate voice coils wound on the same former. Each coil has its own set of input terminals, and the two coils can be wired in different configurations to change the total impedance presented to the amplifier. The R2D4-10's 4-Ohm DVC can be wired to 2-Ohm (parallel), 8-Ohm (series), or 4-Ohm per coil for bi-amplification — giving the installer flexibility to match any mono amplifier's preferred or minimum load impedance.

What amplifier power is correct for the R2D4-10?

The R2D4-10 is rated at 250W RMS. Match the amplifier's rated RMS output at the intended wiring impedance to no more than 250W. If using the 2-Ohm parallel wiring, ensure the amplifier is rated stable at 2-Ohm and confirm its 2-Ohm RMS output is within the subwoofer's rating.

What is the difference between sealed and vented enclosure performance?

In a sealed enclosure the subwoofer works against a fixed volume of air — producing tight, accurate bass with a gradual roll-off below resonance. In a vented enclosure, a tuned port allows the air inside the box to reinforce bass output at the port tuning frequency — producing more output and greater efficiency at that frequency, but with a steeper roll-off below the tuning point.

What enclosure volume is recommended for the R2D4-10?

Enclosure volume, vent dimensions, and tuning frequency recommendations are not confirmed in the supplier data. Pull the official Rockford Fosgate R2D4-10 datasheet for the recommended net internal volume for sealed and vented designs.

What is the advantage of 12 AWG compression terminals over push terminals?

12 AWG compression terminals accept thicker wire, grip it more securely via a mechanical compression mechanism, and provide lower contact resistance than spring-loaded push terminals. For a 250W subwoofer, the higher current demand makes a secure, low-resistance wiring connection more important — reducing the voltage drop and heat generation at the terminal.