Alpine SWT-10S4
10" truck subwoofer with 4-ohm voice coil
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Alpine SWT-10S4 10-Inch Truck Subwoofer (4Ω)
Product Overview:
The SWT-10S4 is a specialized 10-inch subwoofer specifically engineered to deliver high-output bass in the restricted cabin spaces of pickup trucks. Designed to fit where traditional subwoofers cannot, it combines a shallow mounting profile with the heavy-hitting performance characteristics of Alpine's legendary R-Series. This driver is optimized for extremely small enclosures, making it the ideal choice for behind-the-seat or under-seat installations.
Key Features
Optimized for Tight Spaces
The SWT-10S4 features an ultra-shallow mounting depth of just 4-1/8 inches. This design allows truck owners to build or buy compact enclosures that fit into narrow crevices without sacrificing the deep bass performance expected from a full-sized 10-inch driver. It is specifically vented and tuned to perform at its peak in these smaller air volumes.
Extreme Output and Excursion
Equipped with Alpine’s High-Amplitude Multi-Roll (HAMR) Surround, this subwoofer achieves a remarkable 11mm of linear excursion. This allows the cone to move a massive amount of air while maintaining total control and symmetry. The result is "best-in-class" bass output and high SPL levels that typically require much deeper, larger speaker cabinets.
Advanced Thermal Management
To handle up to 350W RMS in a cramped environment, the SWT-10S4 utilizes a Radial Vented Voice Coil Heat Sink and an Airflow Management System. This technology actively forces air across the internal components to dissipate heat, ensuring the subwoofer remains cool and reliable even during extended, high-volume listening sessions.
Low Distortion Engineering
The motor structure is FEA-Optimized (Finite Element Analysis) to create a perfectly symmetrical magnetic field. This precision engineering greatly reduces harmonic distortion and improves power handling, ensuring that your bass sounds clean, accurate, and physical rather than "muddy" or strained.
Technical Specifications
| Category | Specification |
| Performance | |
| Subwoofer Size | 10-Inch |
| Power Handling | 350W RMS / 1000W Peak |
| Nominal Impedance | 4-Ohm (Single Voice Coil) |
| Frequency Response | 30Hz – 200Hz |
| Linear Excursion (Xmax) | 11 mm |
| Construction | |
| Cone Material | Poly-Mica Dust Cap & Pulp-Kevlar |
| Surround Material | Polyurethane Foam (HAMR Design) |
| Voice Coil | 65mm High-Temp 4-Layer |
| Frame Material | High Strength Steel |
| Installation | |
| Mounting Depth | 4-3/16" (105.5mm) |
| Mounting Diameter | 8-15/16" (227mm) |
| Terminal Type | 8AWG Push Terminals |
| Gasket | Concealed Mount (Grille Ready) |
Alpine SWT-10S4 SWT Series 10" 350W RMS (1000W Peak Power Handling) 4 Ohm, Single Voice Coil Shallow Mount Truck Subwoofer
The Alpine SWT-10S4 is a compact 10-inch shallow-mount truck subwoofer engineered to deliver deep, powerful, and accurate bass in tight installation spaces. With its rugged construction and space-saving design, it’s perfect for enhancing low-end performance without sacrificing interior or cargo room. Delivering 350W RMS and up to 1000W peak power, this subwoofer produces strong, dynamic bass that remains clean even at high output levels. Its high-excursion cone and large roll surround allow for greater cone movement, resulting in louder and more precise bass. A vented motor structure helps control heat buildup, ensuring long-lasting, consistent performance during extended listening sessions.
Key Features
-10" shallow-mount subwoofer ideal for trucks and limited-space installations
-350W RMS / 1000W peak power handling for strong bass output
-Single 4-ohm voice coil for flexible amplifier matching
-High-excursion cone for accurate, distortion-free low-frequency performance
-Large roll surround for improved cone movement and deeper bass
-Durable and lightweight cone construction for long-lasting reliability
-Vented motor structure for better cooling and consistent performance
-Thin-mount design fits easily into compact enclosures and tight spaces
What's Inside?
- 10" Thin-mount subwoofer (No Grille)
- Rubber trim-ring (installed)
- Application Guide
- On-line product registration information (English/ French/ Spanish)
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.