10" 4-Ohm DVC Punch P2 Subwoofer 300W RMS, 84dB, 30.8Hz Fs, 11mm Xmax, Kevlar Cone, VAST, Diamond-Cut Cast Aluminium Trim Ring.

Product Overview

The Rockford Fosgate Punch P2D4-10 is a 10" 4-Ohm Dual Voice Coil (DVC) subwoofer rated at 300W RMS (600W peak) the most fully specified subwoofer in this catalogue. The complete specification set includes 84dB sensitivity, 30.8Hz free-air resonance, 11mm Xmax, 232mm (9.13") cutout diameter, 150.4mm (5.92") mounting depth, and full Thiele-Small parameters. CEA-2031 compliant.

The 4-Ohm DVC provides wiring options of 2-Ohm (parallel), 8-Ohm (series), or 4-Ohm per coil for bi-amplification broad amplifier compatibility with no 1-Ohm stability requirement. All confirmed Punch P2 construction applies: Kevlar fibre-reinforced paper cone, VAST surround, high-temperature voice coil with Nomex® reinforcement collar, dual linear spider, extended pole piece with bumped vented backplate, StampCast basket with integrated spider venting, and diamond-cut cast aluminium trim ring.

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): 300W ✓ (CEA-2031)
• Power handling (peak): 600W ✓
• Sensitivity (SPL): 84dB @ 1W/1M ✓
• Free-air resonance (Fs): 30.8Hz ✓
• Xmax: 11mm ✓
• Cutout diameter: 9.13" (232mm) ✓
• Mounting depth: 5.92" (150.4mm) ✓
• Voice coil diameter: 2.25" (57.15mm) ✓
• Magnet weight: 66.4 oz (1.88 kg) ✓
• Effective piston area (Sd): 360 cm² ✓
• Equivalent air volume (Vas): 35.4 litres ✓
• Total Q (Qts): 0.57 ✓
• Electrical Q (Qes): 0.62 ✓
• Mechanical Q (Qms): 7.00 ✓
• Voice coil inductance (Le): 5.3 mH ✓
• DC resistance (Re): 6.40 Ohms ✓
• Woofer displacement: 0.060 cu ft (1.7 litres) ✓
• Shipping weight: 13.6 lbs (6.16 kg) ✓
• CEA-2031 compliant: Yes ✓
• Surround technique: VAST (up to 25% increased cone area)
• Voice coil: High-temp, Nomex® reinforcement collar
• Cone: Kevlar fibre-reinforced paper
• Spider: Dual linear with embedded 16 AWG tinsel leads
• Basket: StampCast with integrated spider venting
• Pole piece: Extended
• Backplate: Bumped and vented
• Input terminals: Features say push / spec table says compression — confirm with Rockford Fosgate
• Trim ring: Diamond-cut cast aluminium (grille insert compatible)
• Magnet cover: Protective PVC textured
• Enclosure compatibility: Sealed and vented ✓
• Sold as: Individual unit
• Warranty: Not specified — confirm with Rockford Fosgate

Features & Benefits

• 300W RMS / 600W Peak — CEA-2031 Compliant — 300W RMS confirmed to the CEA-2031 industry standard for sustained power measurement. 600W peak provides dynamic headroom for programme transients.
• 84dB Sensitivity — At 84dB @ 1W/1M, the P2D4-10 is typical for a subwoofer designed to prioritise bass extension and excursion over efficiency. Lower sensitivity subwoofers require more amplifier power to reach a given output level but can achieve lower frequency extension and more linear excursion than higher-sensitivity designs.
• 30.8Hz Free-Air Resonance (Fs) — An Fs of 30.8Hz is notably low for a 10" subwoofer — indicating excellent low-frequency extension potential. This driver is tuned to produce accurate bass well below 40Hz, covering the deepest bass guitar, kick drum, and synthesizer bass content in music.
• 11mm Xmax — 11mm of linear peak excursion provides a useful working range for a 10" driver in sealed and vented enclosures at 300W.
• Qts = 0.57 — A Qts of 0.57 is in the range suitable for vented enclosures as well as sealed designs. For sealed alignment, a box Qtc of approximately 0.7 is achievable; for vented, the low Fs and Qts combination allows tuning below 30Hz. Rockford Fosgate's recommended enclosure volumes (confirm from datasheet) are the definitive guidance for this driver.
• 232mm Cutout Diameter — The 9.13" (232mm) cutout diameter is confirmed for enclosure baffle and board cutting. Note that this is larger than the common 9" (229mm) cutout used for some 10" subwoofers — confirm the exact measurement before cutting.
• 150.4mm Mounting Depth — At 5.92" (150.4mm), a significant cavity depth is required. Confirm available depth before selecting an enclosure.
• 4-Ohm DVC — Three Wiring Configurations:
  • 2-Ohm (parallel): Most common — compatible with most 2-Ohm mono amplifiers
  • 8-Ohm (series): For amplifiers with higher minimum impedance
  • 4-Ohm per coil (biamp): Separate amplifier channels
• Kevlar Fibre-Reinforced Paper Cone with VAST — Kevlar for stiffness and breakup resistance; VAST for up to 25% increased effective cone area.
• Dual Linear Spider / Nomex® VC Collar / Extended Pole — Premium P2 suspension and motor construction confirmed.
• Diamond-Cut Cast Aluminium Trim Ring — Premium machined aluminium finish with grille insert provision.

Technical Specs

Compatible With / Goes Well With

Suitable enclosure types:

• Sealed — confirm recommended net internal volume from Rockford Fosgate P2D4-10 datasheet
• Vented — confirm net internal volume, port diameter, and port length from datasheet

Wiring:

• 2-Ohm → parallel
• 8-Ohm → series
• 4-Ohm per coil → biamp

Pairs well with:

• Rockford Fosgate T1000-1BDCP (rated stable at 2-Ohm), T1500-1BDCP, or T2500-1BDCP — confirm RMS output at selected impedance matches 300W

Weight

6.16 kg (13.6 lbs) 

Frequently Asked Questions

What do the Thiele-Small parameters mean for enclosure design?

The Thiele-Small parameters (Fs, Qts, Vas, Xmax) are the standard measurements used to design the correct enclosure for a subwoofer. Fs (30.8Hz) is the driver's free-air resonance — below this frequency, output drops off. Qts (0.57) indicates the ratio of resonance sharpness, which determines whether the driver suits sealed or vented alignment. Vas (35.4L) is the equivalent compliance volume. Xmax (11mm) is the peak linear excursion. Together, these are entered into loudspeaker enclosure modelling software (such as WinISD) to design an optimally tuned enclosure. Rockford Fosgate's official recommended volumes should be used as the primary reference.

What is the cutout diameter and mounting depth for the P2D4-10?

Cutout diameter: 9.13" (232mm). Mounting depth: 5.92" (150.4mm). Both are confirmed in the specification table.

What amplifier is appropriate?

A mono amplifier rated at 300W RMS at the intended wiring impedance — 2-Ohm (parallel), 8-Ohm (series), or 4-Ohm (biamp). Confirm the amplifier's CEA-2031 rated RMS output at the selected impedance.

What does CEA-2031 compliant mean?

CEA-2031 is a Consumer Electronics Association standard that defines how RMS power is measured for car audio equipment. A CEA-2031 compliant RMS rating means the 300W figure has been measured to this standard — ensuring it is a genuine sustained power figure, not an inflated marketing value.

Why is the P2D4-10 sensitivity only 84dB?

84dB sensitivity is typical for subwoofers designed to prioritise low-frequency extension and high excursion. The Fs of 30.8Hz requires a compliant suspension that reduces the driver's efficiency. This is a deliberate design trade-off — the P2D4-10 reaches deeper into the bass range and sustains more linear excursion than a higher-sensitivity design, at the cost of requiring more amplifier power for a given output level.