{"product_id":"1-0mm-ofc-air-core-inductor-speaker-crossover-coil-0-07mh-3-3mh","title":"1.0mm Oxygen-Free Copper Air Core Inductor — Speaker Crossover Coil 0.07mH–3.3mH","description":"\u003ch2\u003e1.0mm Oxygen-Free Copper Air Core Inductor — Speaker Crossover Coil 0.07mH–3.3mH\u003c\/h2\u003e\n\u003cp\u003eThese \u003cstrong\u003e1.0mm oxygen-free copper (OFC) air core inductors\u003c\/strong\u003e are wound specifically for passive speaker crossover networks. Unlike iron-core inductors, the air core design eliminates magnetic saturation and hysteresis distortion, delivering cleaner, more accurate frequency division across the audio band. With inductance values from \u003cstrong\u003e0.07mH to 3.3mH\u003c\/strong\u003e and a ±5% tolerance, these coils are suitable for woofer low-pass and midrange bandpass sections in 2-way and 3-way passive crossover designs.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWire Material\u003c\/td\u003e\n\u003ctd\u003eOxygen-Free Copper (OFC), 1.0mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCore Type\u003c\/td\u003e\n\u003ctd\u003eAir core (no magnetic core)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eInductance Range\u003c\/td\u003e\n\u003ctd\u003e0.07mH – 3.3mH (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eInductance Tolerance\u003c\/td\u003e\n\u003ctd\u003e±5%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDCR (DC Resistance)\u003c\/td\u003e\n\u003ctd\u003eVaries by inductance value (lower for smaller values)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003ePassive speaker crossover networks (low-pass, bandpass filters)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eAir Core vs Iron Core Inductors for Audio\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eAir Core (This Product)\u003c\/th\u003e\n\u003cth\u003eIron Core\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMagnetic Saturation\u003c\/td\u003e\n\u003ctd\u003e✅ None — linear at all power levels\u003c\/td\u003e\n\u003ctd\u003e❌ Saturates at high power\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eHysteresis Distortion\u003c\/td\u003e\n\u003ctd\u003e✅ Zero\u003c\/td\u003e\n\u003ctd\u003e❌ Present, adds coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDCR\u003c\/td\u003e\n\u003ctd\u003e❌ Higher (more wire needed)\u003c\/td\u003e\n\u003ctd\u003e✅ Lower\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e❌ Larger for same inductance\u003c\/td\u003e\n\u003ctd\u003e✅ More compact\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBest Use\u003c\/td\u003e\n\u003ctd\u003eTweeter \u0026amp; midrange crossover, audiophile builds\u003c\/td\u003e\n\u003ctd\u003eWoofer low-pass in high-power systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e2-way passive crossover woofer low-pass filter (L-pad section)\u003c\/li\u003e\n  \u003cli\u003e3-way passive crossover midrange bandpass filter\u003c\/li\u003e\n  \u003cli\u003eDIY audiophile speaker crossover upgrades\u003c\/li\u003e\n  \u003cli\u003eReplacement for degraded or incorrect-value crossover inductors\u003c\/li\u003e\n  \u003cli\u003eTube amplifier output filter and choke applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eQ: How do I select the right inductance value for my crossover?\u003c\/h3\u003e\n\u003cp\u003eUse the standard crossover filter formula: \u003cstrong\u003eL = Z \/ (2π × f)\u003c\/strong\u003e for a first-order (6dB\/octave) low-pass filter, where Z is the driver impedance (typically 4Ω or 8Ω) and f is the crossover frequency in Hz. For higher-order filters, use a crossover design calculator (e.g., the one at crossover-calculator.com) to determine the exact L and C values.\u003c\/p\u003e\n\n\u003ch3\u003eQ: What is the power handling of these inductors?\u003c\/h3\u003e\n\u003cp\u003ePower handling depends on the DCR and wire gauge. The 1.0mm OFC wire handles continuous audio power well for most home audio applications (up to ~100W RMS per channel). For high-power PA or subwoofer applications above 200W, consider 1.2mm or 1.4mm wire inductors.\u003c\/p\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× 1.0mm OFC Air Core Crossover Inductor (inductance value per selected variant)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"1.0mm 0.68mH \/ CHINA","offer_id":46959015526635,"sku":"200007763:201336100;696:203121842#1.0mm 0.68mH","price":75.3,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.75mH \/ CHINA","offer_id":46959015559403,"sku":"200007763:201336100;696:203123866#1.0mm 0.75mH","price":79.06,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.82mH \/ CHINA","offer_id":46959015592171,"sku":"200007763:201336100;696:203123870#1.0mm 0.82mH","price":82.5,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.91mH \/ CHINA","offer_id":46959015624939,"sku":"200007763:201336100;696:203121896#1.0mm 0.91mH","price":87.92,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.43mH \/ CHINA","offer_id":46959015657707,"sku":"200007763:201336100;696:203124815#1.0mm 0.43mH","price":58.12,"currency_code":"USD","in_stock":true},{"title":"1.0mm 047mH \/ CHINA","offer_id":46959015690475,"sku":"200007763:201336100;696:203124819#1.0mm 047mH","price":60.86,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.51mH \/ CHINA","offer_id":46959015723243,"sku":"200007763:201336100;696:203121834#1.0mm 0.51mH","price":62.56,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.56mH \/ CHINA","offer_id":46959015756011,"sku":"200007763:201336100;696:203121838#1.0mm 0.56mH","price":65.52,"currency_code":"USD","in_stock":true},{"title":"1.0mm 2.00MH \/ CHINA","offer_id":46959015788779,"sku":"200007763:201336100;696:203121884#1.0mm 2.00MH","price":117.24,"currency_code":"USD","in_stock":true},{"title":"1.0mm 2.20MH \/ CHINA","offer_id":46959015821547,"sku":"200007763:201336100;696:203121888#1.0mm 2.20MH","price":122.18,"currency_code":"USD","in_stock":true},{"title":"1.0mm 2.45MH \/ CHINA","offer_id":46959015854315,"sku":"200007763:201336100;696:203121892#1.0mm 2.45MH","price":137.2,"currency_code":"USD","in_stock":true},{"title":"1.0mm 2.70MH \/ CHINA","offer_id":46959015887083,"sku":"200007763:201336100;696:203122945#1.0mm 2.70MH","price":143.08,"currency_code":"USD","in_stock":true},{"title":"1.0mm 1.00MH \/ CHINA","offer_id":46959015919851,"sku":"200007763:201336100;696:203121900#1.0mm 1.00MH","price":90.84,"currency_code":"USD","in_stock":true},{"title":"1.0mm 1.20MH \/ CHINA","offer_id":46959015952619,"sku":"200007763:201336100;696:203121904#1.0mm 1.20MH","price":97.64,"currency_code":"USD","in_stock":true},{"title":"1.0mm 1.50MH \/ CHINA","offer_id":46959015985387,"sku":"200007763:201336100;696:203121876#1.0mm 1.50MH","price":105.22,"currency_code":"USD","in_stock":true},{"title":"1.0mm 1.80MH \/ CHINA","offer_id":46959016018155,"sku":"200007763:201336100;696:203121880#1.0mm 1.80MH","price":113.12,"currency_code":"USD","in_stock":true},{"title":"1.0mm 3.30MH \/ CHINA","offer_id":46959016050923,"sku":"200007763:201336100;696:203122949#1.0mm 3.30MH","price":147.36,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.22mH \/ CHINA","offer_id":46959016083691,"sku":"200007763:201336100;696:203121827#1.0mm 0.22mH","price":45.42,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.27mH \/ CHINA","offer_id":46959016116459,"sku":"200007763:201336100;696:203121831#1.0mm 0.27mH","price":48.6,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.33mH \/ CHINA","offer_id":46959016149227,"sku":"200007763:201336100;696:203124807#1.0mm 0.33mH","price":51.38,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.39mH \/ CHINA","offer_id":46959016181995,"sku":"200007763:201336100;696:203124811#1.0mm 0.39mH","price":55.18,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.07mH \/ CHINA","offer_id":46959016214763,"sku":"200007763:201336100;696:201215958#1.0mm 0.07mH","price":26.52,"currency_code":"USD","in_stock":true},{"title":"1.0mm 0.15mH \/ CHINA","offer_id":46959016247531,"sku":"200007763:201336100;696:203121823#1.0mm 0.15mH","price":41.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/oxygen-free-copper-air-core-speaker-crossover-inductor-0_07mh-3_3mh.webp?v=1760580845","url":"https:\/\/keszoox.com\/products\/1-0mm-ofc-air-core-inductor-speaker-crossover-coil-0-07mh-3-3mh","provider":"Keszoox","version":"1.0","type":"link"}