Sennheiser A 3700 Active Omni-Directional Antenna

The A 3700 puts the amplifier where it does the most good: at the antenna, before the coax has a chance to throw signal away. It is an omni-directional element for 470 to 866 MHz with an AB 3700 booster integrated into the same flat 23 mm housing, so a long cable run back to the rack costs far less than it would behind a passive element.

The booster draws its power over the coax from the receiver, which means this antenna only works with Sennheiser receivers that supply that feed: EM 3731, EM 3732, EM 2000, EM 2050 and EM 6000. Check the receiver before ordering. At 250 x 165 mm and 390 g it is thin enough to tape to a set wall or hang from truss without a bracket argument.