The Sennheiser A 3700 is a professional-grade, active omnidirectional antenna designed to enhance RF signal reception for Sennheiser's EM 3731, EM 3732, EM 3732 Command, EM 2000/2050, and EM 6000 receivers. Operating within a broad frequency range of 470 to 866 MHz, it features an integrated AB 3700 booster that offers adjustable gain settings of -3 dB (bypass), 5 dB, 10 dB, and 15 dB, ensuring optimal signal strength over extended BNC cable runs . The antenna's omnidirectional pattern provides comprehensive coverage, making it ideal for complex RF environments. Constructed with durability in mind, it includes a standard BNC connector, supports 3/8" or 5/8" mounting threads, and operates on a 9–15 V DC power supply . Its compact dimensions (250 x 165 x 23 mm) and lightweight design (390 g) facilitate easy integration into various setups, making it a reliable choice for broadcast, live performance, and large venue applications.