{"product_id":"stage4-active-cardio-a-ua870a-shure-antenna","title":"Shure UA870A Active Directional Antenna for Wireless Mics","description":"The Shure UA870A is an active directional antenna engineered to improve RF performance for professional wireless microphone systems. Its log-periodic design focuses reception toward the talent or stage, helping to reject off-axis interference and reduce dropouts in congested environments. A built-in low-noise amplifier provides selectable gain to offset cable losses on longer runs, while on-antenna indicators support quick, confident setup. Power can be supplied via bias voltage from compatible Shure receivers or from an external PSU, giving you flexible deployment across stands, truss or wall mounts using standard threads.\n\nRugged construction ensures reliable operation for touring, corporate events, theatre and houses of worship where consistent wireless performance is essential. Use the UA870A to extend effective range and stability for Shure wireless receivers, especially where longer cable paths or challenging RF conditions are part of the job.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eShure UA870A Active Directional Antenna for Wireless Mics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003e\u003cstrong\u003eSTAGE4.7.100.50\u003c\/strong\u003e\u003c\/small\u003e\u003c\/p\u003e","brand":"SHURE","offers":[{"title":"Used Equipment","offer_id":57367643881849,"sku":null,"price":863.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0288\/2260\/1776\/files\/active-cardio-a-ua870a-shure-antenna.jpg?v=1780416256","url":"https:\/\/stage-experts.com\/products\/stage4-active-cardio-a-ua870a-shure-antenna","provider":"Stage Experts Ltd","version":"1.0","type":"link"}