Alpine S2-S50
S-Series 5.25" 2-Way Coaxial Speakers
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Alpine S2-S50 | S-Series 5.25" Coaxial 2-Way Speaker Set
The Alpine S2-S50 (MFR #: S2-S50) is a newly redesigned, Hi-Res Audio Certified coaxial speaker set that sets a new standard for entry-level car audio performance. Drawing inspiration and "trickle-down" technology from the ultra-high-end AlpineF#1Status system, these speakers deliver an incredibly accurate and natural sound. With a compact 2-inch mounting depth, they are engineered for versatile installation in a wide variety of factory speaker locations.
Product Highlights
Hi-Res Audio Certified: Unlike standard car speakers, the Alpine S2-S50 is certified to reproduce frequencies up to 40 kHz. This extended range ensures that high-resolution audio files are delivered with all the detail and texture intended by the artist, providing a level of clarity rarely found in this price category.
Advanced Material Construction: The woofer cone is crafted from a unique blend of polypropylene, glass fiber, and mica. This specific combination creates a lightweight yet rigid diaphragm that can move quickly with minimal distortion, resulting in a clean and highly responsive audio experience.
HAMR Surround Technology: These speakers feature Alpine-exclusive High-Amplitude Multi-Roll (HAMR) surround technology. This specialized rubber surround allows for maximum, linear cone excursion, which enables the 5.25-inch woofers to deliver surprisingly powerful and accurate bass notes for their size.
Integrated Silk Dome Tweeters: High frequencies are handled by integrated 3/4-inch silk dome tweeters. These drivers provide a smooth, non-fatiguing high-end response that perfectly complements the punchy mids of the woofer, ensuring a balanced soundstage throughout your vehicle.
Key Features
Trickle-Down Engineering: By utilizing performance cues from Alpine's flagship systems, the S-Series offers premium sound quality and engineering usually reserved for much more expensive components.
Lightweight Design: The optimized motor structure and advanced cone materials ensure high output even when driven by factory head units, though they truly excel when paired with a dedicated aftermarket amplifier.
Versatile Fitment: With a shallow 2-inch top-mount depth and standard 4.5-inch cutout diameter, these speakers are designed to be a direct "drop-in" upgrade for many vehicles, minimizing the need for custom fabrication.
Optional Protection: For custom installations where the speakers are exposed, the S2-S50 is fully compatible with Alpine’s KTE-S50G mesh grilles (sold separately), which offer a sleek visual upgrade and protection from damage.
Technical Specifications
| Feature | Specification |
| Model Number | S2-S50 |
| Speaker Size | 5.25 in (13 cm) |
| Power Handling (RMS) | 55 Watts |
| Power Handling (Peak) | 170 Watts |
| Impedance | 4-Ohms |
| Frequency Response | 65 Hz – 40,000 Hz |
| Sensitivity | 87 dB (1W/1m) |
| Mounting Depth | 2.0 in (50 mm) |
What’s In The Box?
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(2) Alpine S2-S50 2-Way Coaxial Speakers
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(2) 12-inch lengths of speaker wire (with quick-slide connectors)
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(8) 3/4" Mounting screws
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(8) Speed clips and (8) Flat washers
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Owner's Manual and Warranty Information
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.