Integrated AB 3700 Booster
Front-to-Back Ratio of >= 14 dB
Up to 15 dB of Amplification
Compatible with EM3731, 3732-II, EM2000

The AD 3700 Active Directional Antenna from Sennheiser features an integrated AB 3700 booster, and has a front-to-back ratio of >= 14 dB. It can supply up to 15 dB of amplification, and is compatible with the EM 3731, EM 3732-II, and EM 2000 wireless receivers. It's powered from the connected receiver, via its BNC input.
In the Box
Sennheiser AD 3700 Active Directional Antenna



Frequency Range 470 to 866 MHz
Amplification Bypass (-3 dB), 5 dB, 10 dB, 15 dB adjustable
Without DC feed: -6 dB
RF Connector 1 x BNC
Power Supply 9-15 V DC / 160-100 mA, DC feed via antenna cable (BNC connector)
Mounting 3/8 or 5/8" thread
Compatibility Compatible with EM 3731, EM 3732-II and EM 2000 wireless receivers
Dimensions Not specified by manufacturer
Weight 1.81 lb (0.82 kg)