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The Rockford Fosgate P1S4-12 is a 12-inch single voice coil subwoofer from the Punch P1 range, rated at 250W RMS (500W max) at 4 ohms. It features a Kevlar fibre reinforced paper cone and StampCast basket, and suits sealed or ported enclosures.
This listing is the 4-ohm version. The Punch P1S4-12 is also available in 2 ohm (P1S2-12).
Key specifications
- Model: P1S4-12
- Size: 12 inch
- Power handling: 250W RMS / 500W max
- Impedance: 4 ohm (single voice coil)
- Mounting depth: 152.4mm (6.0 inch)
- Cutout diameter: 285mm (11.22 inch)
- Recommended sealed box: 28.8 litres (1.02 cu ft)
- Recommended ported box: 50.6 litres (1.79 cu ft)
- Fs: 25Hz
Punch P1 12" 4-Ohm Subwoofer
The P1S4-12 is the entry point to Rockford Fosgate's Punch subwoofer family, designed for cars and trucks. It handles 250W RMS through a 4-ohm voice coil and accepts an optional grille insert via the included soft-touch ABS trim ring.
Key Features
- 1-year warranty
- Kevlar fibre reinforced paper cone
- StampCast basket with integrated spider venting
- Rubberised ABS trim ring with optional grille
- High-temp voice coil with spun-laced Nomex® reinforcement collar
- Linear spider with embedded 16 AWG tinsel leads
- Extended pole piece and bumped vented backplate
- Custom 10-AWG nickel plated push terminals
- Protective PVC textured magnet cover
Explore the full range in Rockford Fosgate.
Specification
| Power Handling | (Watts RMS)250 Watts RMS |
|---|---|
| Magnet | Weight (oz)45 oz. (1.28 kg.) |
| Voice Coil | TypeSingle Voice Coil |
| Voice Coil | Diameter2.0" (51.6 mm) |
More specs
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What's Included
- P1S4-12
Rockford Fosgate
About the Rockford Fosgate P1S4-12
From our tech experts at CEN
A Rockford Fosgate 12 inch subwoofer, 4 ohm, handling 250w RMS.
Who it suits
Drivers building a system where the bass does real work rather than filling in behind the speakers.
Our tech experts advise
Enclosure volume and tuning decide most of what you hear. We build enclosures to suit both driver and vehicle at our Beeston workshop. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
Explore the full Rockford Fosgate range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Rockford Fosgate
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Frequently Asked Questions
Q: Do I need an amplifier for this subwoofer?
A: Yes, unless it is an active (powered) subwoofer with a built-in amplifier. Passive subwoofers need an external amplifier matched to the RMS power and impedance shown in the Specification tab.
Q: What size enclosure does this subwoofer need?
A: The recommended enclosure volume is listed in the Specification tab where the manufacturer provides it. As a rule, sealed enclosures give tighter, more accurate bass while ported enclosures deliver more output. Contact CEN if you would like a recommendation for your build.
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only. Match your amplifier output to the RMS rating in the Specification tab.
Q: Sealed or ported enclosure - which should I choose?
A: Sealed boxes are compact and produce tight, controlled bass suited to sound quality builds. Ported boxes are larger and produce more output at low frequencies, suited to those who want maximum impact. Either works well when built to the recommended volume.
Q: Can CEN build or supply an enclosure and fit everything?
A: Yes. CEN supplies enclosures and offers professional installation from our Nottingham premises, including amplifier wiring. Contact us to discuss your build.
Q: What box volume does the P1S4-12 need?
A: Rockford Fosgate recommends 28.8 litres (1.02 cu ft) for a sealed enclosure and 50.6 litres (1.79 cu ft) for a vented (ported) enclosure.
Q: What are the cutout and mounting depth of the P1S4-12?
A: The P1S4-12 needs a 285mm (11.22 inch) cutout and has a mounting depth of 152.4mm (6.0 inch).
Q: Is the P1S4-12 a 4 ohm subwoofer?
A: Yes. The P1S4-12 has a single voice coil with a nominal impedance of 4 ohm, rated at 250W RMS and 500W max.
