{"product_id":"sennheiser-spectera-sek-bidirectional-bodypack-for-iem-reception-and-mic-line-transmission-frequency-range-1g4-1350-1400-mhz-and-1435-1525-mhz-requires-ba-70-battery-sold-separately","title":"Sennheiser 509163 – Spectera SEK Bodypack 1G4","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Sennheiser 509163 Spectera SEK is a bidirectional bodypack for the 1G4 band (1350–1400 MHz and 1435–1525 MHz) that handles both in-ear monitor reception and microphone\/line transmission in a single unit. Each Spectera SEK bodypack manages an IEM\/IFB stream and a mic\/line stream simultaneously, replacing the separate transmitter and receiver packs of conventional wireless systems. As a bidirectional 1G4 bodypack, it is built for broadcast, theater, and live performance where talent needs both wireless mic and personal monitoring. It operates as part of the Sennheiser Spectera digital wireless ecosystem and requires the BA 70 rechargeable battery, sold separately.\u003c\/p\u003e\u003ch2\u003eProduct Description\u003c\/h2\u003e\u003cp\u003eThe Spectera SEK is the on-body transceiver of Sennheiser's Spectera bidirectional wideband wireless platform. Operating in the 1G4 range, it simultaneously transmits a microphone or line signal back to the Spectera Base Station while receiving an in-ear monitor or IFB feed, all over a single bidirectional RF link.\u003c\/p\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/Zz01MTkyYTg2MGU3Y2YxMWYwYWZkMWVhNTViNWQyZmI4Ng.png?v=1780789040\" alt=\"Sennheiser 509163 Spectera SEK 1G4 bidirectional bodypack front\"\u003e\u003cp\u003eThe bodypack delivers an audio frequency response of 20 Hz to 20,000 Hz (plus\/minus 1 dB) at a 96 kHz \/ 24-bit sample rate, and secures its link with AES 256 CTR Mode encryption. RF transmission power is up to 50 mW, limited by country regulation. It connects to a wide range of Sennheiser lavalier and headset microphones via a 3-pin locking connector, and to in-ear monitors through a 3.5 mm connector, so it drops into existing microphone and IEM inventories. A persistent always-on display, status LED, and LED meter keep operators informed of level and status even when the pack is idle. The unit measures approximately 83.5 x 62 x 21 mm (without antenna), keeping it compact for body-worn use. Powered by the rechargeable lithium-ion BA 70 battery (sold separately), it delivers up to 7 hours of operation depending on the selected audio link mode and settings. For deployments, the SEK pairs with a licensed Spectera Base Station and the appropriate DAD antennas. A UHF variant is also available for installations operating in the 470–698 MHz range.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBidirectional Operation\u003c\/strong\u003e — Each bodypack simultaneously transmits a mic\/line signal and receives an IEM\/IFB stream over one RF link.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1G4 Frequency Range\u003c\/strong\u003e — The pack operates in the 1G4 band, covering 1350–1400 MHz and 1435–1525 MHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Audio\u003c\/strong\u003e — It delivers a 20 Hz to 20,000 Hz response (plus\/minus 1 dB) at a 96 kHz \/ 24-bit sample rate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAES 256 Encryption\u003c\/strong\u003e — AES 256 CTR Mode encryption secures the bidirectional wireless link.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Connectivity\u003c\/strong\u003e — A 3-pin locking connector accepts Sennheiser lavalier and headset mics, while a 3.5 mm output drives in-ear monitors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways-On Display\u003c\/strong\u003e — A persistent display, status LED, and LED meter keep level and status information visible at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 50 mW RF Power\u003c\/strong\u003e — The pack transmits at up to 50 mW, limited according to country regulations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 7 Hours Runtime\u003c\/strong\u003e — The rechargeable BA 70 lithium-ion battery (sold separately) provides up to 7 hours depending on link mode and settings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBroadcast studio\u003c\/li\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eAll-hands room\u003c\/li\u003e\n\u003cli\u003eTraining room\u003c\/li\u003e\n\u003cli\u003eMulti-purpose room\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\u003e509163\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWireless Microphone Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Type\u003c\/td\u003e\n\u003ctd\u003eBidirectional bodypack (mic\/line Tx + IEM\/IFB Rx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e1G4 (1350–1400 MHz and 1435–1525 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio Frequency Response\u003c\/td\u003e\n\u003ctd\u003e20 Hz – 20,000 Hz (plus\/minus 1 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSample Rate\u003c\/td\u003e\n\u003ctd\u003e96 kHz \/ 24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRF Transmission Power\u003c\/td\u003e\n\u003ctd\u003eUp to 50 mW (country-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEncryption\u003c\/td\u003e\n\u003ctd\u003eAES 256 CTR Mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMic Connector\u003c\/td\u003e\n\u003ctd\u003e3-pin locking (Sennheiser lavalier\/headset)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIEM Connector\u003c\/td\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eBA 70 rechargeable Li-ion (sold separately), up to 7 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eapprox. 83.5 x 62 x 21 mm (without antenna)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003ePersistent display, status LED, LED meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\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\u003eWhat does bidirectional mean on the Spectera SEK?\u003c\/h3\u003e\u003cp\u003eThe bodypack transmits a microphone or line signal to the base station while simultaneously receiving an in-ear monitor or IFB feed, handling both directions over a single RF link.\u003c\/p\u003e\u003ch3\u003eWhat battery does the SEK use?\u003c\/h3\u003e\u003cp\u003eIt uses the rechargeable lithium-ion BA 70 battery, which is sold separately, and delivers up to 7 hours of operation depending on the link mode and settings.\u003c\/p\u003e\u003ch3\u003eWhat microphones and monitors are compatible?\u003c\/h3\u003e\u003cp\u003eThe pack accepts a wide range of Sennheiser lavalier and headset microphones via a 3-pin locking connector, and connects to in-ear monitors through a 3.5 mm output.\u003c\/p\u003e\u003ch3\u003eWhat is the audio quality?\u003c\/h3\u003e\u003cp\u003eThe SEK provides a 20 Hz to 20,000 Hz frequency response (plus\/minus 1 dB) at a 96 kHz \/ 24-bit sample rate.\u003c\/p\u003e\u003ch3\u003eHow is the wireless link secured?\u003c\/h3\u003e\u003cp\u003eThe link uses AES 256 CTR Mode encryption to protect the audio signal.\u003c\/p\u003e\u003ch3\u003eWhat else do I need to run the SEK?\u003c\/h3\u003e\u003cp\u003eThe SEK operates within the Spectera ecosystem and requires a licensed Spectera Base Station and the appropriate DAD antennas, plus a BA 70 battery for the pack itself.\u003c\/p\u003e\u003ch3\u003eIs there a version for UHF frequencies?\u003c\/h3\u003e\u003cp\u003eYes. Sennheiser offers a UHF variant of the Spectera SEK for installations operating in the 470–698 MHz range; this model is the 1G4 version.\u003c\/p\u003e\u003ch3\u003eWhere can I get integration support?\u003c\/h3\u003e\u003cp\u003eOur team can assist with Spectera system design, frequency coordination, and microphone selection. Contact us through \u003ca href=\"https:\/\/creationnetworks.net\"\u003ecreationnetworks.net\u003c\/a\u003e.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":47711666340076,"sku":"509163","price":1999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/Zz0wOWNhMDA4Y2U3Y2YxMWYwODhkYjc2OGVlOGU5N2FlYQ.png?v=1780789040","url":"https:\/\/creationnetworks.net\/products\/sennheiser-spectera-sek-bidirectional-bodypack-for-iem-reception-and-mic-line-transmission-frequency-range-1g4-1350-1400-mhz-and-1435-1525-mhz-requires-ba-70-battery-sold-separately","provider":"Creation Networks","version":"1.0","type":"link"}