Rockford Fosgate P3SD4-8
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Punch 8" P3S Shallow 4-Ohm DVC Subwoofer
If you love deep, hitting bass but drive a truck, a compact sedan, or a vehicle with tight trunk space, you’ve probably been told you just don't have the room for a real subwoofer. The Rockford Fosgate P3SD4-8 is built specifically to prove that wrong.
Instead of forcing you to choose between having a functional trunk or having great sound, this 8-inch shallow-mount subwoofer is engineered to fit into tight spaces where a traditional, bulky woofer simply can’t. Rockford Fosgate compressed the physical size of the motor structure without sacrificing the "Punch" they are famous for.
So, what makes this version different? This model features Dual 4-Ohm voice coils. If you are looking to wire a single subwoofer down to a 2-Ohm load to get the perfect amount of power out of a standard mono amplifier, or if you plan on running a pair of these subs together, this D4 version is exactly what you need. It delivers a solid 150 Watts RMS of clean, impactful low-end right from behind your seat or under a cargo floor. It's real bass, tailored for real-world space.
Product Highlights
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Big Bass, Tiny Footprint: Specially designed shallow motor assembly allows you to drop this into tight enclosures, making it the perfect upgrade for trucks, compact sedans, and SUVs with limited space.
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Dual 4-Ohm Configuration: Built with Dual 4-Ohm Voice Coils (DVC), giving you the specific electrical flexibility needed for multi-sub setups or matching perfectly with standard mono car amplifiers.
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Premium Construction: An anodized aluminum cone and dustcap keep the woofer incredibly rigid and lightweight, meaning your bass stays clean and distortion-free even when you crank the volume.
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Stays Cool Under Pressure: The StampCast basket features integrated spider venting to continuously flow air across the voice coils, protecting your investment during long, loud listening sessions.
Key Features
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M-Roll Santoprene™ Surround: This specialized rubber surround allows for maximum cone movement (excursion) while resisting the wear, tear, and temperature shifts of daily life in a vehicle.
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Enclosure Versatility: Optimized to perform beautifully whether you prefer the tight, accurate punch of a sealed box or the extra volume and boom of a vented enclosure.
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Dual Linear Spiders: Features embedded 16 AWG tinsel leads to securely guide the cone's movement, ensuring long-term reliability and preventing annoying mechanical noise or rattles at high volume.
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Diamond Cut Trim Ring: Includes a cast aluminum trim ring that gives your install a clean, high-end look right out of the box, with the option to add a protective grille later.
Technical Specifications
| Feature | Specification |
| Subwoofer Size | 8" |
| Woofer Series | Punch P3S |
| Impedance | Dual 4-Ohm |
| Power Handling (RMS) | 150 Watts |
| Power Handling (Max) | 300 Watts |
| Cone Material | Anodized Aluminum |
| Surround Material | M-Roll Santoprene™ |
| Voice Coil Type | Dual Voice Coil (DVC) |
What’s In The Box?
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(1) Rockford Fosgate P3SD4-8 Shallow Subwoofer
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(1) Diamond Cut Aluminum Trim Ring
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Mounting Hardware (Hex head screws)
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Installation and Operation Manual
What Others Are Saying
Eddie was great - SDCS installed a new head unit in my 2019 4Runner. He was honest in his opinions regarding the options I was considering. Pricing was also good - he was able to reuse some of my existing installation kit so I saved a bit of $$.Installation was clean and fast and he took the time to walk through the features before I left. Highly recommend!!
I had a great time at this shop! The staff really knows their stuff and took the time to explain the different options without pressure. Installation was quick, clean and professional. Everything looks factory and sounds amazing. The prices were fair and customer service was above and beyond. I highly recommend this place if you're looking for quality car audio and excellent service.
Those guys are really professional! I had a new Alpine floating head unit installed in my 2008 Mercedes, and it feels like a brand-new car. The installation was super clean. At first, the sound wasn’t the same as the factory stereo, but Kevin tuned it to be just as good—if not better—without adding any new amps. They even used my factory GPS antenna so I don’t have extra wires hanging out. On top of that, they matched the online price. Big thanks to Kevin and Eddie—highly recommended!
Kevin was awesome, he took his time and explained everything to me. I went in initially for a dash cam install and then decided to get a sub and amp installed as well. Both turned out great and will be returning if I need more work done.
Came In not knowing what to expect when suddenly my stereo stopped working. Spoke with Kevin in the front and after a VERY fast diagnosing they discovered my wiring was incorrect. After only about 45 minutes total being in the store I was on my way to the beach with a working stereo again! Thank you so much SDCARSTEREO
Highly recommend Kevin and the team at San Diego Car Stereo for any issues with aftermarket stereos. I bought a car with an aftermarket stereo and AC unit that wasn’t working properly—specifically, the heat wasn’t functioning due to an improper setup. I had several people look at it with no luck, and even the dealership basically refused to help because it was an aftermarket install. I came to Kevin and his team over the holidays feeling pretty defeated, but he was confident he could get the heat working before I headed back to a Colorado winter. Sure enough, he got it done.
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.