Description
12" 4-Ohm SVC Punch Subwoofer 250W RMS, Kevlar Fibre-Reinforced Paper Cone, VAST, Nomex® Voice Coil Collar, Extended Pole Piece, 10-AWG Nickel Push Terminals.
Product Overview
The Rockford Fosgate Punch P1S4-12 is a 12" 4-Ohm Single Voice Coil (SVC) subwoofer rated at 250W RMS the 4-Ohm variant of the 12" Punch P1 platform. Identical construction to the P1S2-12 with the sole difference being the 4-Ohm voice coil impedance, which suits a broader range of mono amplifiers than the 2-Ohm variant. Optimised for sealed and vented enclosures. Sold as an individual unit.
All confirmed Punch P1 construction applies: Kevlar fibre-reinforced paper cone, VAST surround (up to 25% increased cone area), high-temperature voice coil with spun-laced Nomex® reinforcement collar, extended pole piece with bumped vented backplate, StampCast basket with integrated spider venting, 10-AWG nickel-plated push terminals, rubberized ABS trim ring with grille insert provision, and protective PVC textured magnet cover.
Key Specifications
- Subwoofer size: 12 inch
- Voice coil configuration: Single Voice Coil (SVC)
- Impedance: 4-Ohm
- Power handling (RMS): 250W (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
- Voice coil: High-temp, Nomex® reinforcement collar
- Cone: Kevlar fibre-reinforced paper
- Spider: Linear with embedded 16 AWG tinsel leads
- Basket: StampCast with integrated spider venting
- Pole piece: Extended
- Backplate: Bumped and vented
- Input terminals: 10-AWG nickel-plated push terminals
- Trim ring: Rubberized ABS (grille insert compatible)
- Magnet cover: Protective PVC textured
- 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
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4-Ohm SVC — Broad Amplifier Compatibility — A 4-Ohm SVC presents a universally compatible load to most mono subwoofer amplifiers. Two P1S4-12 units in parallel = 2-Ohm; in series = 8-Ohm.
-
12" Cone — Larger cone area than the 10" P1 models for greater air movement, more bass output, and lower frequency extension.
-
250W RMS — Confirmed 250W RMS sustained power handling.
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Kevlar Fibre-Reinforced Paper Cone — Kevlar reinforcement for improved stiffness and breakup resistance at high output levels, with paper's natural damping and low mass.
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VAST — Up to 25% increased effective cone area for improved efficiency and output.
-
Nomex® Voice Coil Reinforcement Collar — Heat and mechanical reinforcement at the voice coil-to-cone junction.
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Extended Pole Piece and Bumped Vented Backplate — Extended pole for increased Xmax; vented backplate eliminates air spring compression.
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10-AWG Nickel-Plated Push Terminals — Heavier gauge for lower contact resistance at 250W.
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StampCast Basket with Integrated Spider Venting — Motor cooling during operation.
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Rubberized ABS Trim Ring / Grille Provision / PVC Magnet Cover — Clean installation finish with optional grille.
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Sealed and Vented Compatible — Both enclosure types confirmed.
Technical Specs
| Specification |
Detail |
| Brand |
Rockford Fosgate |
| Part Number |
P1S4-12 |
| Series |
Punch P1 |
| Subwoofer Size |
12 inch |
| Voice Coil |
Single Voice Coil (SVC) |
| Impedance |
4-Ohm ✓ |
| Power Handling (RMS) |
250W ✓ |
| Peak Power |
Not specified |
| Surround Technique |
VAST (up to 25% increased cone area) ✓ |
| Sensitivity |
Not specified |
| Frequency Response |
Not specified |
| Xmax |
Not specified |
| Voice Coil |
High-Temp, Nomex® Collar ✓ |
| Cone |
Kevlar Fibre-Reinforced Paper ✓ |
| Spider |
Linear, Embedded 16 AWG Tinsel Leads |
| Basket |
StampCast with Integrated Spider Venting |
| Pole Piece |
Extended ✓ |
| Backplate |
Bumped and Vented ✓ |
| Input Terminals |
10-AWG Nickel-Plated Push Terminals ✓ |
| Trim Ring |
Rubberized ABS (Grille Insert Compatible) ✓ |
| Magnet Cover |
Protective PVC Textured ✓ |
| Enclosure Type |
Sealed and Vented ✓ |
| Mounting Depth |
Not specified |
| Cutout Diameter |
Not specified |
| Sold As |
Individual Unit |
| Weight |
Not specified |
| Warranty |
Not specified — confirm with Rockford Fosgate |
Compatible With / Goes Well With
Suitable enclosure types:
- Sealed — tight, accurate bass
- Vented — higher efficiency at tuning frequency
Wiring:
- 4-Ohm SVC — single 4-Ohm load per unit
- Two units in parallel = 2-Ohm; two units in series = 8-Ohm
Pairs well with:
- Rockford Fosgate T1000-1BDCP, T1500-1BDCP, or T2500-1BDCP mono amplifiers at 4-Ohm
Frequently Asked Questions
What is the difference between the P1S4-12 and P1S2-12?
Both are identical 12" Punch P1 subwoofers with the same 250W RMS rating and construction. The only difference is impedance: the P1S4-12 is 4-Ohm SVC, the P1S2-12 is 2-Ohm SVC. The 4-Ohm is compatible with a wider range of amplifiers; the 2-Ohm suits amplifiers that produce their maximum rated output at 2-Ohm.
What amplifier power is appropriate?
250W RMS at 4-Ohm. Confirm the amplifier's RMS output at 4-Ohm before purchasing.
What enclosure volume is recommended?
Not confirmed in the supplier data. Pull the official Rockford Fosgate P1S4-12 datasheet for sealed and vented volume recommendations.
Is a grille available?
The rubberized ABS trim ring accommodates an optional grille insert. Confirm the compatible grille SKU with Rockford Fosgate.
Does this subwoofer suit trucks as well as cars?
The supplier description confirms this model is designed for cars and trucks. The sealed and vented enclosure compatibility provides flexibility for the range of install locations common in both passenger vehicles and utes, vans, and trucks.
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