Alpine S2-S40C
S-Series 4" Component Speaker Set
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The Alpine S2-S40C is a Hi-Res Audio Certified 4" 2-way component speaker system designed to deliver high-fidelity sound reproduction. Featuring a polypropylene, glass fiber, and mica composite woofer cone, along with a 1" silk dome tweeter, this system ensures clear vocals and detailed high frequencies. The High-Amplitude Multi-Roll (HAMR) surround allows for maximum cone excursion, resulting in powerful bass response. Its lightweight design ensures high output with low distortion, making it an excellent upgrade for enhancing your vehicle's audio performance.
| Key Features | |
|---|---|
| Speaker Type | 2-Way Component |
| Hi-Res Audio Certified | Yes (Up to 40kHz) |
| Tweeter | 1" Silk Dome with Threaded Removable Housing |
| Grilles Included | No |
| What’s in the Box |
|---|
| 2 × 4" Woofers |
| 2 × 1" Tweeters with In-Line Crossovers |
| 2 × 4x6 Adapter Brackets |
| 2 × Flush Mount Housings |
| 1 × Mounting Hardware |
| 1 × Owner’s Manual |
| Technical Specifications | |
|---|---|
| Power Handling (RMS) | 45W |
| Power Handling (Peak) | 140W |
| Frequency Response | 97Hz – 40kHz |
| Sensitivity | 86dB |
| Impedance | 4 Ohms |
| Top-Mount Depth | 1.75" |
| Cutout Diameter | 3.69" |
| Mounting Height | 0.28" |
| Warranty | 1 Year |
Alpine S2-S40C Next-Generation S-Series 4" 45W RMS (140W Peak Power Handling) 4 Ohms Component Speaker System with Two Cloth Dome Tweeters
High-Resolution Audio for Every Driver
The Alpine S2-S40C is engineered to give more drivers access to premium, high-resolution sound in a compact 4-inch design. This component speaker system includes two 4-inch mid-bass woofers and two 1-inch silk dome tweeters, delivering a refined, immersive listening experience that transforms your vehicle’s audio performance.
Ultra-Wide Frequency Response With Surprising Power
Don’t let the small size fool you — the S2-S40C delivers impressive strength with 140W peak power and 45W RMS. The specialized hybrid woofer cone provides exceptional rigidity and control, ensuring tight, accurate bass and clean midrange output. Every detail in your music is reproduced with clarity and precision, even at higher volumes.
Advanced HAMR Technology for Smooth, Controlled Sound
Featuring Alpine’s patented High Amplitude Multi-Roll (HAMR) surround, the woofers achieve greater cone excursion while minimizing distortion. This results in deeper, richer bass and smoother mid-range performance. The 1-inch silk dome tweeters produce delicate, detailed high frequencies — and with their swivel design, you can direct the sound toward your ideal listening position for enhanced soundstage and imaging.
High-Frequency Detail You’ve Been Missing
Designed with low-profile grilles, the S2-S40C blends seamlessly into your interior while keeping the drivers protected. This component system is the perfect upgrade for enthusiasts who want premium audio performance in tight spaces without sacrificing clarity or impact.
Key Features
– Compact 4-inch component speaker system
– Includes two 4" mid-bass woofers + two 1" silk dome tweeters
– Hybrid woofer cone for accuracy and controlled bass
– HAMR surround for maximum excursion and reduced distortion
– Swivel tweeters for optimized direction and imaging
– Handles 45W RMS / 140W peak power
– Clear, smooth highs and detailed mid-range response
– Low-profile grilles for clean OEM-style installation
– Ideal for tight spaces without compromising sound quality
What's Inside?
- (2) Woofers
- (2) 4x6 Adapter brackets
- (2) Tweeters (each has a 29" length of wire attached)
- (2) Flush mount housings (with tweeters installed)
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.