Rockford Fosgate P2D4-15 Punch 15" P2 4-Ohm DVC Subwoofer

15" 4-Ohm DVC Punch P2 Subwoofer 400W RMS, Kevlar Cone, VAST, Dual Spider, Diamond-Cut Cast Aluminium Trim Ring, Extended Pole Piece.

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Product Overview

The Rockford Fosgate Punch P2D4-15 is a 15" 4-Ohm Dual Voice Coil (DVC) subwoofer rated at 400W RMS the 4-Ohm variant of the 15" Punch P2 platform. Identical construction to the P2D2-15 with the sole difference being 4-Ohm voice coil impedance per coil, providing wiring options of 2-Ohm (parallel), 8-Ohm (series), or 4-Ohm per coil for bi-amplification no 1-Ohm stability requirement. Optimised for sealed and vented enclosures. Sold as an individual unit.

A 15" subwoofer requires a substantially larger enclosure and installation space than smaller formats. Confirm enclosure volume requirements, mounting depth, and available space from the official Rockford Fosgate P2D4-15 datasheet before purchasing.

All confirmed Punch P2 construction applies: Kevlar fibre-reinforced paper cone, VAST surround (up to 25% increased cone area), high-temperature voice coil with Nomex® reinforcement collar, dual linear spider with embedded 16 AWG tinsel leads, extended pole piece with bumped vented backplate, StampCast basket with integrated spider venting, diamond-cut cast aluminium trim ring with grille provision, and protective PVC textured magnet cover.

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Key Specifications

• Subwoofer size: 15 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): 400W (confirmed)
• Peak power: Not specified — confirm with Rockford Fosgate
• Surround technique: VAST (up to 25% increased cone area)
• Sensitivity: Not specified — confirm with Rockford Fosgate
• Frequency response: Not specified — confirm with Rockford Fosgate
• Xmax: Not specified — confirm with Rockford Fosgate
• Cutout diameter: Not specified — confirm with Rockford Fosgate
• Mounting depth: Not specified — confirm with Rockford Fosgate
• 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: push — confirm vs compression 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
• Weight: Not specified — confirm with Rockford Fosgate
• Warranty: Not specified — confirm with Rockford Fosgate

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Features & Benefits

• 4-Ohm DVC — Broad Amplifier Compatibility:
  • 2-Ohm (parallel): Compatible with most 2-Ohm mono amplifiers
  • 8-Ohm (series): For amplifiers with higher minimum impedance
  • 4-Ohm per coil (biamp): Separate amplifier channels
• 400W RMS — Confirmed 400W RMS in the 15" format.
• 15" Cone — Maximum air movement and lowest frequency extension in the P2 range. Requires the largest enclosure in the Punch P2 catalogue.
• Dual Linear Spider — Improved compliance linearity and cone control at high excursion.
• Kevlar Fibre-Reinforced Paper Cone with VAST — Stiffened paper with up to 25% increased effective cone area.
• Nomex® Voice Coil Collar — Thermal and mechanical reinforcement at the voice coil junction.
• Extended Pole Piece and Bumped Vented Backplate — Increased Xmax; air spring prevention.
• Diamond-Cut Cast Aluminium Trim Ring — Premium machined finish with grille provision.
• StampCast Basket with Integrated Spider Venting — Motor cooling.

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Technical Specs

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Compatible With / Goes Well With

Suitable enclosure types:

• Sealed and vented — both confirmed

Wiring:

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

Pairs well with:

• Rockford Fosgate T1500-1BDCP or T2500-1BDCP mono amplifiers — confirm 400W RMS at selected impedance

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Frequently Asked Questions

What is the difference between P2D4-15 and P2D2-15?

Both are identical 15" Punch P2 subwoofers at 400W RMS. The sole difference is impedance: P2D4-15 is 4-Ohm per coil (2-Ohm parallel / 8-Ohm series), P2D2-15 is 2-Ohm per coil (1-Ohm parallel / 4-Ohm series). The 4-Ohm DVC avoids the 1-Ohm parallel requirement, providing broader amplifier compatibility.

What amplifier power is appropriate?

400W RMS at the selected wiring impedance. Confirm the amplifier's RMS output at 2-Ohm (parallel) before purchasing.

What enclosure volume is required?

Not confirmed. A 15" driver requires considerably more net internal volume than 10" or 12" formats. Pull the official Rockford Fosgate P2D4-15 datasheet.

Is a grille available?

The diamond-cut cast aluminium trim ring accommodates an optional grille insert. Confirm the SKU with Rockford Fosgate.

Does the P2D4-15 suit a standard car boot installation?

A 15" driver and its enclosure require significantly more space than 10" or 12" installations. Best suited to vehicles with generous boot space, custom builds, utes, vans, or trucks. Confirm installation dimensions before purchasing.