{"product_id":"infinity-reference-ref407f-4-coaxial-speakers","title":"Infinity Reference REF407F 4\" Coaxial Speakers","description":"\u003cdiv\u003e\n\u003cp\u003eInfinity Reference REF407F 4\" 2-way car speakers are a high-efficiency upgrade designed to fit behind factory grilles or panels in most applications, delivering punchy midbass and smooth highs. \u003cimg alt='Infinity Reference REF407F 2-way 4\" car speakers' src=\"https:\/\/images.crutchfieldonline.com\/ImageHandler\/scale\/978\/978\/products\/2024\/1\/108\/x108R407F-o_other4.jpg\" width=\"100%\"\u003e They perform best when powered by an external amplifier but remain compatible with factory or aftermarket stereos.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePlus One+ polypropylene woofer cone\u003c\/b\u003e: Oversized cone with a hi-roll rubber surround moves more air for louder, more impactful bass from a compact 4\" driver.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e1\/2\" textile balanced-dome tweeter\u003c\/b\u003e: Produces clear, smooth high frequencies for a refined top end without harshness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue Four Ohm Impedance technology\u003c\/b\u003e: The speaker's 3-ohm impedance combines with vehicle wiring to present a 4-ohm load, ensuring compatibility with virtually all factory and aftermarket radios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePower handling\u003c\/b\u003e: Rated to handle up to 35W RMS (105W peak), offering solid performance with stock head units and headroom when paired with an amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFrequency response\u003c\/b\u003e: 75 Hz – 21,000 Hz, enabling reproduction from deep bass fundamentals up into the upper treble for a fuller sound.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSensitivity\u003c\/b\u003e: 92 dB @ 2.83V, meaning more output with less power and easier integration with common car stereos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTop-mount depth\u003c\/b\u003e: 1.875\", a compact depth that helps with fitment behind factory panels in many vehicles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGrilles\u003c\/b\u003e: Grilles are not included, so verify compatibility with your factory grille or panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty\u003c\/b\u003e: 1 year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat’s in the box\u003c\/b\u003e: Infinity Reference REF407F owner's manual; Two 2-way speakers; Adhesive backed foam gasket strips; Instruction manual; Template on box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBenefits: In a real-car install, this pair provides noticeably stronger midbass from a small footprint while delivering refined highs through the textile dome tweeters. The 3-ohm\/4-ohm impedance design ensures broad compatibility with most radios, so you can use either a factory head unit or add an external amplifier for improved dynamics. With a 75 Hz lower limit and 92 dB sensitivity, the REF407Fs offer usable bass extension and higher efficiency, making them a practical upgrade for tighter doors or panels where space is limited and sound quality matters.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Infinity","offers":[{"title":"Default Title","offer_id":49850259374308,"sku":null,"price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/2522\/9028\/files\/g108R407F-o_other0_1.jpg?v=1789262106","url":"https:\/\/www.12voltoutlet.com\/products\/infinity-reference-ref407f-4-coaxial-speakers","provider":"12 Volt Outlet","version":"1.0","type":"link"}