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Alpine

4-Inch 2-Way Coaxial Speakers

Name: 4-Inch 2-Way Coaxial Speakers
Brand: Alpine
SKU: S2-S40

$106.65

SKU: S2-S40

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Overview

The Alpine S2-S40 is a 4-inch coaxial 2-way speaker set. These next-generation S-Series speakers are Hi-Res Audio Certified, capable of reproducing frequencies up to 40kHz. They feature a lightweight cone made from poly propylene, glass fiber, and mica for high output and low distortion.

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The Alpine S2-S40 Next-Generation S-Series speakers represent a new standard in entry-level sound performance for your vehicle's audio system. Newly redesigned and Hi-Res Audio Certified, these 4-inch coaxial speakers draw inspiration from Alpine's Ultra-High-Resolution AlpineF#1Status system to deliver accurate and natural sound. Constructed with a unique Polypropylene, Glass Fiber, and Mica woofer cone, the S2-S40 is engineered for lightweight strength, high output, and minimal distortion. The woofer incorporates a High Amplitude Multi-Roll (HAMR) surround, maximizing cone movement for improved bass response. A 3/4-inch cloth dome tweeter complements the woofer by providing detailed high-frequency reproduction, aiming to surpass the clarity of factory speakers. These speakers handle up to 45 watts RMS (140 watts peak) and offer a broad frequency response from 100 Hz to 40,000 Hz, with a sensitivity of 86 dB. The mounting depth is a shallow 1.72 inches, making them suitable for a variety of vehicle applications. Included in the box are two speakers, 4x6 adapter brackets, speaker wire, and various mounting hardware, including screws and speed clips. Grilles are not included.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Alpine
Part Number	S2-S40
Category	Interior and Accessories

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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