{"product_id":"soundxtreme-st-603-6-3-way-coaxial-car-speakers","title":"SoundXtreme ST-603 6\" 3-Way Coaxial Car Speakers","description":"\u003cp\u003eThe SoundXtreme ST-603 is a pair of 6-inch, 3-way coaxial car speakers designed as a direct replacement or basic upgrade for compatible factory speaker locations. Their coaxial construction places multiple drivers within each speaker assembly, helping keep installation straightforward where a conventional round speaker fits. They are intended for wired vehicle-audio systems using 4-ohm speaker outputs.\u003c\/p\u003e\u003cp\u003eThese speakers are suited to drivers replacing worn or damaged factory speakers, as well as listeners who want a full-range coaxial speaker without adding separate tweeters. The ST-603 uses an injection-cone woofer and a PEI dome tweeter arrangement to cover bass, midrange, and high-frequency content from a single mounting location. Published sensitivity is 89 dB.\u003c\/p\u003e\u003cp\u003eThe speaker design is listed with a 30 mm PEI dome tweeter, a 25 mm voice coil, and a 10-ounce magnet. A rubber surround and steel basket are also listed in marketplace specifications. These elements support the speaker's compact, vehicle-oriented coaxial design.\u003c\/p\u003e\u003cp\u003eSoundXtreme lists the ST-603 as a 350-watt maximum-power speaker, while some marketplace copy separately states a 320-watt peak-power figure. An RMS power rating has not been verified, so amplifier matching should not be based on an assumed RMS value. The published frequency-response figure most consistently reported in technical listings is 65 Hz to 20 kHz.\u003c\/p\u003e\u003cp\u003eWith a listed mounting depth of 2-3\/4 inches, the ST-603 should be measured against the available depth and mounting diameter in the intended vehicle before purchase. It can be used with a factory head unit or a compatible external amplifier, provided the installation supports 4-ohm speakers. The pair format makes it practical for replacing two matching speakers in a vehicle audio system.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Way Coaxial Design:\u003c\/strong\u003e Combines multiple driver elements in each speaker assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6-Inch Round Format:\u003c\/strong\u003e Intended for compatible standard round speaker locations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Ohm Impedance:\u003c\/strong\u003e Matches many conventional vehicle speaker circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePEI Dome Tweeter:\u003c\/strong\u003e Uses a listed 30 mm PEI dome high-frequency driver.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjection-Cone Woofer:\u003c\/strong\u003e Provides the primary low- and mid-frequency driver section.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e89 dB Sensitivity:\u003c\/strong\u003e Published sensitivity specification for the ST-603.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe ST-603 is built around a steel basket, injection-cone woofer, rubber surround, 25 mm voice coil, and 10-ounce magnet. Product listings also identify a rubber magnet boot cover and a PEI dome tweeter assembly. The speakers use a round coaxial layout rather than separate component woofer and tweeter installations.\u003c\/p\u003e\u003cp\u003eConfirm that the vehicle accepts a 6-inch round speaker and provides at least 2-3\/4 inches of mounting depth before installation. The speakers are listed with spade terminals, so use secure, correctly polarized speaker-wire connections and appropriate vehicle-specific mounting hardware or adapters when required. A pair of ST-603 speakers is included; verify all supplied accessories upon delivery because package-content descriptions vary by seller.\u003c\/p\u003e","brand":"SoundXtreme","offers":[{"title":"Default Title","offer_id":45660713549894,"sku":"ST-603","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/71SPGOMq7ZL.jpg?v=1784447763","url":"https:\/\/audiowatt.store\/products\/soundxtreme-st-603-6-3-way-coaxial-car-speakers","provider":"Audio Watt Store","version":"1.0","type":"link"}