{"product_id":"helix-ci7-t20fm-sc-20mm-silk-dome-tweeter-4-ohm","title":"HELIX Ci7 T20FM-SC 20mm Silk Dome Tweeter 4 Ohm","description":"The HELIX COMPOSE i7 20 mm high-end silk dome tweeter delivers brilliant, velvety treble reproduction thanks to its finely woven diaphragm with visco-elastic Acronal coating on both sides. An integrated, pure sheep wool damped coupling volume enables an exceptionally low resonance frequency for deep acoustic integration. The compact, machined aluminium housing includes both flush and angled mounting options, while the FlexMount20 system allows near-universal vehicle fitment using optional adapter rings. Made in Germany and optimised for seamless pairing with HELIX and MATCH amplifiers.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType\u003c\/strong\u003e: Tweeter\u003cbr\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e: 20 mm\u003cbr\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e: 4 Ohm\u003cbr\u003e\u003cstrong\u003eDC Resistance (Re)\u003c\/strong\u003e: 3.4 Ohm\u003cbr\u003e\u003cstrong\u003eFrequency Range\u003c\/strong\u003e: 1,500 Hz - 30,000 Hz\u003cbr\u003e\u003cstrong\u003eResonance Frequency (Fs)\u003c\/strong\u003e: 950 Hz\u003cbr\u003e\u003cstrong\u003eSensitivity (SPL)\u003c\/strong\u003e: 91 dB @ 2.83V\/1m\u003cbr\u003e\u003cstrong\u003eVoice Coil Diameter\u003c\/strong\u003e: 20 mm\u003cbr\u003e\u003cstrong\u003eDiaphragm Material\u003c\/strong\u003e: Silk dome with coupling volume\u003cbr\u003e\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 32 mm\u003cbr\u003e\u003cstrong\u003eMounting Diameter\u003c\/strong\u003e: 27.2 mm\u003cbr\u003e\u003cstrong\u003eMounting Depth\u003c\/strong\u003e: 19 mm\u003cbr\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e: Aluminium (machined)\u003cbr\u003e\u003cstrong\u003eMagnet Type\u003c\/strong\u003e: Neodymium\u003cbr\u003e\u003cstrong\u003eRecommended High-Pass Slope 6 dB\/octave\u003c\/strong\u003e: \u0026gt; 4,000 Hz\u003cbr\u003e\u003cstrong\u003eRecommended High-Pass Slope 12 dB\/octave\u003c\/strong\u003e: \u0026gt; 3,000 Hz\u003cbr\u003e\u003cstrong\u003eRecommended High-Pass Slope 24 dB\/octave\u003c\/strong\u003e: \u0026gt; 2,500 Hz\u003cbr\u003e\u003cstrong\u003eMounting System\u003c\/strong\u003e: FlexMount20 compatible\u003cbr\u003e","brand":"HELIX","offers":[{"title":"Default Title","offer_id":53773343031633,"sku":"CI21001","price":349.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1041\/2772\/5905\/files\/Ci7-T20FM-SC_4c891461-f91b-49ec-9dd5-274f702faae3.jpg?v=1778714240","url":"https:\/\/shoponyxac.co.uk\/products\/helix-ci7-t20fm-sc-20mm-silk-dome-tweeter-4-ohm","provider":"Onyx Auto Care","version":"1.0","type":"link"}