{"product_id":"sennheiser-aca-3-active-antenna-combiner-2-x-4-1-compatible-with-analog-and-digital-sennheiser-wireless-stationary-receivers-includes-aca-3-and-3-mains-cables-eu-uk-us","title":"Sennheiser ACA 3 – 2x4:1 Active Antenna Combiner","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Sennheiser ACA 3 is a rack-mount 2 x 4:1 active antenna combiner for distributing RF to analog and digital Sennheiser wireless stationary receivers. This active antenna combiner supports distributed antenna systems for multi-room wireless microphone coverage in large venues. It operates across 470 to 798 MHz and is compatible with all analog and digital Sennheiser stationary receivers in that range. AV integrators deploy it to feed multiple receivers from a shared antenna front end in broadcast, worship, and large-venue installations.\u003c\/p\u003e\u003ch2\u003eProduct Description\u003c\/h2\u003e\u003cp\u003eThe ACA 3 is a 1U, 19-inch rack-mount unit that combines antenna signals at unity gain to drive banks of Sennheiser wireless receivers. It is engineered for zone and distributed antenna systems where wireless microphone coverage must span multiple rooms, large halls, or complex sites. The combiner provides 0 dB gain (within +\/-3 dB across 470-790 MHz), so it distributes RF without altering signal level, preserving the link budget across the antenna network.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/Zz1jMTkyODNjOGU3YWQxMWYwODA0ZmJlYjQzYzY2MTIyYQ.png?v=1780788576\" alt=\"Sennheiser ACA 3 antenna combiner front\"\u003e\u003c\/p\u003e\u003cp\u003eEach of the eight antenna inputs offers switchable DC power for head amps or active antennas such as the AB 3, AB 3700, A12AD, and AB 9000, and RF from each input is switchable to isolate unused antennas. Front-panel LEDs indicate input state, including RF present, DC on, and DC current overload, which helps integrators diagnose a faulty or short-circuited antenna cable during commissioning. Connections are made over BNC connectors, the standard for professional RF distribution. The unit outputs 12 V at up to 250 mA with overload protection for powered antenna components. It ships with the ACA 3 and three mains cables (EU, UK, and US) for international deployment. Backed by a 2-year warranty, the ACA 3 is a core building block for scalable wireless microphone infrastructure in large churches, broadcast facilities, and outdoor event sites.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x 4:1 Combining at Unity Gain\u003c\/strong\u003e — The combiner merges antenna signals at 0 dB gain to feed banks of receivers without altering signal level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Frequency Range\u003c\/strong\u003e — It supports 470 to 798 MHz, covering the tuning ranges of analog and digital Sennheiser stationary receivers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitchable DC on Each Input\u003c\/strong\u003e — Each antenna input can supply DC power for head amps or active antennas such as the AB 3, AB 3700, A12AD, and AB 9000.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRF Input Isolation\u003c\/strong\u003e — RF from each of the eight antenna inputs is switchable, letting integrators isolate unused antennas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic LED Indicators\u003c\/strong\u003e — Front-panel LEDs show RF present, DC on, and DC current overload to flag faulty antenna cabling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBNC Connectivity\u003c\/strong\u003e — Standard BNC connectors integrate the unit into professional RF distribution infrastructure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1U Rack-Mount Chassis\u003c\/strong\u003e — The 19-inch, 1U form factor installs cleanly into a standard equipment rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternational Power Cables\u003c\/strong\u003e — The unit ships with EU, UK, and US mains cables for deployment across regions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHouse of worship campuses with multi-room wireless coverage\u003c\/li\u003e\n\u003cli\u003eBroadcast studio and facility RF distribution\u003c\/li\u003e\n\u003cli\u003eAuditorium and large-venue wireless microphone systems\u003c\/li\u003e\n\u003cli\u003eMulti-purpose rooms and commercial meeting spaces with zoned coverage\u003c\/li\u003e\n\u003cli\u003eGovernment spaces requiring distributed wireless infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number (SKU)\u003c\/td\u003e\n\u003ctd\u003e390038\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eACA 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eAntennas \u0026amp; RF Distribution (Active Antenna Combiner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration\u003c\/td\u003e\n\u003ctd\u003e2 x 4:1 active antenna combiner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e470 - 798 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e0 dB (±3 dB) @ 470-790 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectors\u003c\/td\u003e\n\u003ctd\u003eBNC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e12 V, 250 mA max (overload protected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e43 x 483 x 205 mm (HxWxD), 19\", 1U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2750 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIn the Box\u003c\/td\u003e\n\u003ctd\u003eACA 3, 3 mains cables (EU, UK, US), quick guide, safety guide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVendor\u003c\/td\u003e\n\u003ctd\u003eSennheiser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhich receivers is the ACA 3 compatible with?\u003c\/h3\u003e\u003cp\u003eThe ACA 3 works with all analog and digital Sennheiser wireless stationary receivers operating in the 470 to 798 MHz range. Confirm your receiver tuning range falls within this band.\u003c\/p\u003e\u003ch3\u003eHow does the ACA 3 fit into a distributed antenna system?\u003c\/h3\u003e\u003cp\u003eIt combines antenna signals at unity gain and distributes RF to multiple receivers, enabling zone or multi-room wireless microphone coverage from a shared antenna front end.\u003c\/p\u003e\u003ch3\u003eCan it power active antennas?\u003c\/h3\u003e\u003cp\u003eYes. Each antenna input offers switchable DC power for head amps and active antennas such as the AB 3, AB 3700, A12AD, and AB 9000, with a 12 V, 250 mA overload-protected output.\u003c\/p\u003e\u003ch3\u003eHow is it installed in a rack?\u003c\/h3\u003e\u003cp\u003eThe ACA 3 is a 1U, 19-inch rack-mount unit that installs into a standard equipment rack alongside receivers and other RF distribution gear.\u003c\/p\u003e\u003ch3\u003eWhat connectors does it use?\u003c\/h3\u003e\u003cp\u003eIt uses BNC connectors on its antenna inputs and outputs, the standard for professional RF distribution cabling.\u003c\/p\u003e\u003ch3\u003eHow do I troubleshoot a faulty antenna cable?\u003c\/h3\u003e\u003cp\u003eFront-panel LEDs indicate RF present, DC on, and DC current overload. A current overload indication can flag a shorted or faulty antenna cable during commissioning.\u003c\/p\u003e\u003ch3\u003eWhat warranty and support are included?\u003c\/h3\u003e\u003cp\u003eThe ACA 3 carries a 2-year manufacturer warranty. For system design and integration support, contact Creation Networks at https:\/\/creationnetworks.net.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":47711664996588,"sku":"390038","price":4350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/Zz1jMTkyODNjOGU3YWQxMWYwODA0ZmJlYjQzYzY2MTIyYQ.png?v=1780788576","url":"https:\/\/creationnetworks.net\/products\/sennheiser-aca-3-active-antenna-combiner-2-x-4-1-compatible-with-analog-and-digital-sennheiser-wireless-stationary-receivers-includes-aca-3-and-3-mains-cables-eu-uk-us","provider":"Creation Networks","version":"1.0","type":"link"}