{"product_id":"ds18-4-inch-coaxial-car-speakers-s40-40w-rms","title":"DS18 4-Inch Coaxial Car Speakers S40 40W RMS","description":"\u003cp\u003e\u003cstrong\u003eThe DS18 S40 is a compact 4-inch 2-way coaxial speaker pair that delivers 40W RMS (120W peak) of clearer mids and crisp highs, built for tight mounting locations with a low 1.67\" depth.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your factory speakers sound muddy or you need a space-efficient upgrade for doors, dashboards, or small enclosures, the S40 offers a practical balance of power handling and detail. These speakers combine a Mylar tweeter and PPI-treated woofer cone, a sturdy black matte steel basket, and a barium ferrite magnet for reliable everyday performance without complicated installation.\u003c\/p\u003e\n\n\u003ch3\u003eHow will these speakers improve everyday listening?\u003c\/h3\u003e\n\u003cp\u003eThe S40 focuses on clearer midrange and improved high-frequency extension compared with typical factory units. With a 5.3 oz magnet and rubber surround, distortion is reduced and transient response becomes tighter, so vocals and instruments are more distinct.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e40W RMS power handling for sustained volume without strain\u003c\/li\u003e\n  \u003cli\u003eIntegrated mylar tweeter for defined highs\u003c\/li\u003e\n  \u003cli\u003eRubber surround and PPI cone for controlled midrange\u003c\/li\u003e\n  \u003cli\u003e85 dB sensitivity to work well with most factory and aftermarket head units\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the S40 fit my car’s limited mounting space?\u003c\/h3\u003e\n\u003cp\u003eYes — the S40 was engineered for narrow installations. Its shallow 1.67\" mounting depth and compact 4.09\" overall diameter make it suitable for many OEM locations where deeper speakers won’t fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOverall diameter: 4.09\" (104 mm) for small speaker openings\u003c\/li\u003e\n  \u003cli\u003eFront mount baffle cutout: 3.6\" (92 mm) to match common factory holes\u003c\/li\u003e\n  \u003cli\u003eLow 1.67\" mounting depth ideal for door cavities and dashboards\u003c\/li\u003e\n  \u003cli\u003eIncludes protective grille for a neat, finished appearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do the technical specs affect compatibility and sound?\u003c\/h3\u003e\n\u003cp\u003eThe S40 pair uses a 4-ohm nominal impedance and an 85 dB sensitivity rating, which makes them compatible with most stock amplifiers and head units while achieving good volume for daily listening. A recommended high-pass crossover near 120 Hz helps protect the speakers from low-bass energy they aren’t designed to reproduce.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNominal impedance: 4 ohms — standard for car audio systems\u003c\/li\u003e\n  \u003cli\u003eSensitivity: 85 dB for efficient output with factory radios\u003c\/li\u003e\n  \u003cli\u003eFrequency response: 80 Hz–20 kHz for full vocal and treble coverage\u003c\/li\u003e\n  \u003cli\u003eRecommended high-pass crossover: 120 Hz to preserve speaker integrity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat components and build features ensure durability?\u003c\/h3\u003e\n\u003cp\u003eDS18 built the S40 with materials chosen for longevity and thermal stability. The voice coil assembly uses ASV and EISV elements to help dissipate heat, while the metal basket and robust magnet assembly maintain structural integrity over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBarium ferrite magnet for consistent magnetic performance\u003c\/li\u003e\n  \u003cli\u003eBlack matte steel basket that resists everyday wear\u003c\/li\u003e\n  \u003cli\u003eVoice coil with ASV\/EISV parts for better thermal handling\u003c\/li\u003e\n  \u003cli\u003eIncluded grille to protect the cone from impact and debris\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The DS18 S40 4\" coaxial pair is aimed at drivers who need a straightforward upgrade from OEM speakers without changes to factory mounting locations. If you want clearer vocals and treble, a compact form factor for constrained spaces, and components built for reliable daily use, these speakers are a practical choice. They’re ideal for small cars, classic vehicles with limited retrofit room, and anyone pairing them with a stock head unit or modest aftermarket amplifier.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these speakers easy to install in factory locations?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 1.67\" mounting depth and 3.6\" cutout match many OEM openings for straightforward replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need an external amp for good performance?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Not required. They work well with stock head units, though an amp improves headroom and cleaner dynamics.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DS18","offers":[{"title":"Default Title","offer_id":48413585735837,"sku":"B0FR9H5KJX","price":49.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/ds18-s40-front-packaging.jpg?v=1781272820","url":"https:\/\/nexoltic.com\/products\/ds18-4-inch-coaxial-car-speakers-s40-40w-rms","provider":"Nexoltic","version":"1.0","type":"link"}