Alpine S2-S40 S-Series 4" Coaxial 2-Way Car Speakers

Alpine S2-S40 S-Series 4" Coaxial 2-Way Car Speakers

If you're looking for a solid upgrade that won’t break the bank but still delivers crisp, detailed sound, the Alpine S2-S40 is a serious contender. These 4" coaxial 2-way speakers aren’t just about filling space in your doors—they’re built to elevate your drive with rich, clean audio that’s a major step up from stock.

Hi-Res Audio That Punches Above Its Weight

Let’s start with the headliner: these speakers are Hi-Res Audio Certified, which means they can reproduce sounds all the way up to 40kHz. That’s way beyond what most basic speakers can handle. It’s the kind of detail that makes your favorite songs sparkle—with instruments sounding more lifelike and vocals feeling way more intimate.

Built With Premium Materials, Not Just Plastic

Alpine didn't skimp on the build either. The cone uses a blend of Polypropylene, Glass Fiber, and Mica, which keeps things light but stiff. Why does that matter? Lightweight cones move faster, meaning you get better clarity and snappy response without distortion muddying the mix. Think of it like swapping your old sneakers for racing shoes—same sport, whole new level of performance.

HAMR Surround = Bigger Bass From a Smaller Speaker

This little 4" speaker has some surprising low-end punch, thanks to Alpine’s exclusive High-Amplitude Multi-Roll (HAMR) surround. It lets the cone move more freely, like giving it extra suspension travel. More movement means more bass—tight, controlled, and clean, not the bloated boom that drowns everything else out.

Tweeters That Don't Scream

Integrated right into the coaxial design are 3/4" tweeters that blend seamlessly with the woofer. You’re not just getting highs—you’re getting balanced highs. There’s no ear-piercing sharpness, just smooth detail that brings out the shimmer in cymbals or the airiness in vocals without making your ears tap out halfway through a road trip.

Specs That Matter on the Road

• Woofer Size: 4"
• Tweeter Size: 3/4" (Coaxial)
• Power Handling: 45W RMS / 140W Peak
• Frequency Response: 97Hz – 40kHz
• Sensitivity: 86dB

Whether you’re rolling with a modest head unit or pairing them with a small amp, the Alpine S2-S40 performs without demanding a full system overhaul.

A Smart Upgrade Without the Drama

The Alpine S2-S40 isn’t trying to compete with pro-level components, and that’s the point. It’s about giving your daily drive a serious sound upgrade—tight mids, clean highs, and surprisingly solid bass—without having to rewire your entire ride. It’s straightforward, effective, and way more exciting than stock.

FAQs

1. What makes the Alpine S2-S40 different from other 4" speakers? These are Hi-Res Audio Certified and built with high-quality materials like glass fiber and mica, giving them better clarity and sound accuracy than most entry-level speakers.
2. Is the Alpine S2-S40 good for factory system upgrades? They're designed to work well with standard systems while still offering a noticeable boost in sound quality.
3. Do these speakers handle bass well for their size? Yes, the HAMR surround technology allows for better cone movement, which delivers tighter and more impactful bass than you’d expect from a 4" speaker.
4. How loud can the Alpine S2-S40 get without distortion? With 45W RMS and 140W peak power handling, they can get pretty loud while still maintaining clarity, especially when paired with clean power.
5. What kind of music sounds best on the Alpine S2-S40? These speakers handle a wide range of genres well, from acoustic to rock to pop, thanks to their balanced frequency response and detailed highs.