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.