Description
8" P3S Shallow 4-Ohm DVC Subwoofer 150W RMS, Anodised Aluminium Cone, M-Roll Santoprene Surround, Shallow Motor Assembly. Sealed and Vented Compatible.
Product Overview
The Rockford Fosgate Punch P3SD4-8 is an 8" 4-Ohm Dual Voice Coil (DVC) shallow subwoofer rated at 150W RMS the 4-Ohm variant of the P3S 8" shallow platform. Identical construction to the P3SD2-8 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. Confirmed compatible with both sealed and vented enclosures. Sold as an individual unit.
All confirmed P3S construction applies: anodised aluminium cone and dustcap, M-Roll Santoprene surround, dual linear spider with embedded 16 AWG tinsel leads, StampCast basket with integrated spider venting, shallow motor assembly, and diamond-cut cast aluminium trim ring with grille provision. Full specifications must be confirmed from the official Rockford Fosgate P3SD4-8 datasheet.
Key Specifications
- Subwoofer size: 8 inch (shallow)
- Voice coil configuration: Dual Voice Coil (DVC)
- Impedance: 4-Ohm per coil (2-Ohm parallel / 8-Ohm series / 4-Ohm biamp)
- Power handling (RMS): 150W (confirmed)
- Peak power: Not specified — confirm with Rockford Fosgate
- Motor assembly: Shallow ✓
- Sensitivity: Not specified — confirm with Rockford Fosgate
- Frequency response: Not specified — confirm with Rockford Fosgate
- Xmax: Not specified — confirm with Rockford Fosgate
- Mounting depth: Shallow — exact depth not confirmed
- Cutout diameter: Not specified — confirm with Rockford Fosgate
- Cone: Anodised aluminium ✓
- Dustcap: Anodised aluminium ✓
- Surround: M-Roll Santoprene ✓
- Spider: Dual linear with embedded 16 AWG tinsel leads ✓
- Basket: StampCast with integrated spider venting ✓
- Input terminals: Not specified — confirm with Rockford Fosgate
- Trim ring: Diamond-cut cast aluminium (grille insert compatible) ✓
- Enclosure compatibility: Sealed and vented ✓
- Sealed enclosure volume: Not specified — confirm with Rockford Fosgate
- Vented enclosure volume: 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
-
4-Ohm DVC — No 1-Ohm Requirement:
-
2-Ohm (parallel): Compatible with most 2-Ohm mono amplifiers
-
8-Ohm (series): For amplifiers with higher minimum impedance
-
4-Ohm per coil (biamp): Each coil to a separate amplifier channel
-
150W RMS — Confirmed — appropriate for the shallow motor's excursion capacity.
-
Sealed and Vented Compatible — Both enclosure types confirmed, providing installation flexibility not available in sealed-only shallow subwoofers.
-
Anodised Aluminium Cone and Dustcap — Rigid, heat-conducting aluminium cone in the shallow platform format.
-
M-Roll Santoprene Surround — Controlled compliance geometry and durable elastomer surround for long-term reliability.
-
Dual Linear Spider — Improved suspension control at high excursion in the shallow motor format.
-
StampCast Basket with Integrated Spider Venting — Motor cooling during sustained operation.
-
Diamond-Cut Cast Aluminium Trim Ring — Premium finish with optional grille provision.
Technical Specs
| Specification |
Detail |
| Brand |
Rockford Fosgate |
| Part Number |
P3SD4-8 |
| Series |
Punch P3S (Shallow) |
| Subwoofer Size |
8 inch (shallow) |
| Voice Coil |
Dual Voice Coil (DVC) |
| Impedance per Coil |
4-Ohm ✓ |
| Wiring Options |
2-Ohm (parallel) / 8-Ohm (series) / 4-Ohm biamp ✓ |
| Power Handling (RMS) |
150W ✓ |
| Peak Power |
Not specified |
| Motor Assembly |
Shallow ✓ |
| Sensitivity |
Not specified |
| Frequency Response |
Not specified |
| Xmax |
Not specified |
| Mounting Depth |
Shallow — exact depth not confirmed |
| Cutout Diameter |
Not specified |
| Sealed Enclosure Vol. |
Not specified |
| Vented Enclosure Vol. |
Not specified |
| Cone |
Anodised Aluminium ✓ |
| Dustcap |
Anodised Aluminium ✓ |
| Surround |
M-Roll Santoprene ✓ |
| Spider |
Dual Linear, Embedded 16 AWG Tinsel Leads ✓ |
| Basket |
StampCast with Integrated Spider Venting ✓ |
| Input Terminals |
Not specified — confirm with Rockford Fosgate |
| Trim Ring |
Diamond-Cut Cast Aluminium (Grille Compatible) ✓ |
| Enclosure Type |
Sealed and Vented ✓ |
| Sold As |
Individual Unit |
| Weight |
Not specified |
| Warranty |
Not specified — confirm with Rockford Fosgate |
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:
- A mono amplifier rated at 150W RMS at the selected wiring impedance
- A shallow sealed or vented 8" enclosure to Rockford Fosgate's recommended volume
Frequently Asked Questions
What is the difference between P3SD4-8 and P3SD2-8?
Both are identical 8" P3S shallow subwoofers at 150W RMS. The sole difference is impedance: P3SD4-8 is 4-Ohm per coil (2-Ohm parallel / 8-Ohm series), P3SD2-8 is 2-Ohm per coil (1-Ohm parallel / 4-Ohm series). The 4-Ohm variant avoids the 1-Ohm parallel requirement, providing broader amplifier compatibility.
Can the P3SD4-8 be used in a vented enclosure?
Yes — the P3SD4-8 is confirmed compatible with both sealed and vented enclosures. Confirm Rockford Fosgate's recommended enclosure volumes from the official P3SD4-8 datasheet.
What mounting depth does the P3SD4-8 require?
Confirmed shallow, but the exact millimetre figure is absent. Pull from the official Rockford Fosgate P3SD4-8 datasheet before purchasing for any depth-constrained installation.
What amplifier power is appropriate?
150W RMS at the selected wiring impedance. Confirm the amplifier's RMS output at 2-Ohm (parallel) or 4-Ohm before purchasing.
What is the M-Roll Santoprene surround?
M-Roll is the rolled-edge surround profile chosen for the compliance geometry appropriate to a shallow motor. Santoprene is a thermoplastic vulcanizate elastomer with excellent UV resistance and temperature stability. Together they provide durable, controlled cone suspension suited to the P3S shallow platform.
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