Rockford Fosgate P28S4
Punch Stage 2 8" 4-ohm subwoofer
Item # 575P28S4 | MFR # P28S4
This item is no longer available.
Our take on the Rockford Fosgate P28S4 by Crutchfield's Steven Johnson
Step right up to Rockford Fosgate's Punch Stage 2 subwoofer! Its molded polypropylene cone combines with a stamped steel frame and heavy-duty foam surround for great bass, total structural integrity, and sharp looks.
The Punch Stage 2 8" sub uses a 2" voice coil and a 30 oz. magnet for solid power handling. The voice coil is wound on an aluminum former to shed heat quickly and keep your sound free of distortion. Put this pounder in a sealed or ported enclosure, and you'll love what you hear.Details:
- 8" 4-ohm subwoofer
- molded polypropylene woofer cone
- 30-ounce magnet
- power range: 50-200 watts RMS (400 watts peak power)
- frequency response: 40-250 Hz
- sensitivity: 84 dB
- top-mount depth: 3-13/16"
- sealed box volume: 0.25 cubic feet
- ported box volume: 0.65 cubic feet
- Recommended Q-Logic Box Type: 1
- warranty: 1 year
Priced per speaker
For the price these are by far the best sounding 8" subs I've ever put behind the back seat of my '02 Tacoma double cab. Highly recommended for tight spaces.
James, Marengo, IL
What's in the Box:
- One 8" woofer
- 1 Concealing ring
- 12 Self-tapping screws
- 1 Allen bit
- 4 Self-adhesive foam gasket sections
- Installation and Operation manual (English/French/Spanish/German/Italian)
- "Team RF" window sticker
Rockford Fosgate P28S4 Reviews
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Features and Specs
|Cone Material||Molded polypropylene|
|Ideal Sealed Box Volume (cubic feet)||0.25|
|Ideal Ported Box Volume (cubic feet)||0.65|
|Port diameter (inches)||2|
|Port length (inches)||5.9|
|Dual Voice Coil||No|
84 dB at 1 watt |
|Frequency Response||40 - 250 Hz|
|Max RMS Power Handling||200|
|Peak Power Handling (Watts)||400|
|Top Mount Depth (inches)||3 13/16|
|Bottom Mount Depth (inches)||N/A|
|Cutout Diameter or Length (inches)||7|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Woofer: The cone is constructed of molded polypropylene. Polypropylene is lightweight and strong, giving the woofer high power handling and low distortion.
High Excursion Large Roll Surround: A large edge roll surround allows Punch woofers to produce 20% more linear excursion than standard surrounds, resulting in more bass output.
Parabolic Triangular Cone Geometry Support System: By bonding a polypropylene parabolic dust cap of equivalent size to the cone body, a balanced triangular structure is created. This system reduces piston flex and eliminates cone distortion.
Linear Spider: A compliant linear spider improves mechanical stability under high excursion, maintaining consistent excursion characteristics. This eliminates the need for a "break-in period."
Spider Support Ring: This integrated ring increases the bonding surface area between the voice coil former and spider, establishing a stronger joint. The result is increased mechanical power handling under high power/high excursion situations.
Anodized Aluminum Voice Coil Former: Aluminum voice coil formers offer superior heat dissipation over other commonly used materials. The hard-anodized finish increases the former's strength. These two factors combine to improve the overall power handling characteristics of the subwoofer.
Precision Stamped CRS Basket: Reinforced cold roll steel basket legs dampen unwanted resonance for better bass coupling.
Double Stacked Magnet Motor Assembly: The stacked magnet assembly is used to create a powerful linear motor with increased excursion capability for superior bass output.
Removable Magnet Cover: The cosmetic magnet cover can be removed when additional mounting clearance is required. With the magnet cover installed, the woofer has the following dimensions:
- Magnet Diameter: 6.237"
- Depth as top: 4.037"
Spring Posts: The heavy-duty spring posts will accept pin connectors and bare wire.
Concealing Ring: Once the subwoofer is mounted, the concealing ring can be installed to hide the mounting screws, giving the subwoofer a finished look.
Recommended Sealed Box Volume: The sealed box sizes recommended by Rockford Fosgate range from 0.15 cu/ft to 0.35 cu/ft. Within this range, the ideal size recommended by Rockford Fosgate is 0.25 cu/ft, so this is the enclosure recommended by Crutchfield.
Recommended Vented Box Volume: The vented box sizes recommended by Rockford Fosgate range from 0.5 cu/ft to 0.75 cu/ft. Within this range, the ideal size recommended by Rockford Fosgate is 0.65 cu/ft, so this is the enclosure recommended by Crutchfield. One 2" diameter x 5.9" long port should be used with a 0.65 cu/ft enclosure.
Recommended Single Reflex Bandpass Volume: Rockford Fosgate's enclosure chart lists three compatible bandpass enclosures. The highlighted bandpass enclosure has a sealed chamber volume of 0.25 cu/ft, a vented chamber volume of 0.2 cu/ft and a single 3" diameter x 14.25" long port. The smallest recommended enclosure has a sealed chamber volume of 0.15 cu/ft, a vented chamber volume of 0.14 cu/ft and a single 3" diameter x 20.5" long port. The largest recommended enclosure has a sealed chamber volume of 0.35 cu/ft, a vented chamber volume of 0.25 cu/ft and a single 3" diameter x 17.5" long port.
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