Sennheiser A 3700 Active Omnidirectional Receiver Antenna (470-866 MHz)

Active omnidirectional antenna with adjustable gain for Sennheiser 2000, 3000, and 6000 Series receivers

The Sennheiser A 3700 is an active omnidirectional receiver antenna covering 470 to 866 MHz with adjustable amplification at 5, 10, or 15 dB. Designed for Sennheiser EM 2000, EM 2050, EM 3731, EM 3732, and EM 6000 receivers, the A 3700 compensates for signal loss in long coaxial cable runs by boosting the received RF signal before it travels through the cable to the receiver.

The selectable gain settings allow the technician to match the antenna's amplification to the specific cable length and loss characteristics of the installation. Shorter cable runs may need only 5 dB of gain, while longer runs through thinner coax may require the full 15 dB. This flexibility makes the A 3700 suitable for both compact rack setups and large-venue installations where antennas are positioned far from the receivers.

Key Features

• Active omnidirectional antenna with built-in amplifier
• Adjustable gain: 5 dB, 10 dB, or 15 dB
• Wideband coverage: 470-866 MHz
• BNC connector with 3/8-inch mounting thread
• DC power via coaxial cable from compatible receivers
• Compatible with EM 2000, 2050, 3731, 3732, and 6000 receivers

Professional Applications

Commonly deployed in church, house of worship, and professional AV environments.

• Remote antenna placement with long coaxial cable runs
• Large venue, worship center, and arena wireless microphone deployments
• Theater and broadcast installations with distant receiver locations
• Touring productions requiring flexible antenna gain settings

Frequently Asked Questions

How does the A 3700 receive power?

The A 3700 is powered via DC bias on the coaxial cable from compatible Sennheiser receivers. No separate power supply is required when used with supported receiver models.

Can I use the A 3700 with Evolution Wireless receivers?

The A 3700 is designed for the 2000, 3000, and 6000 Series receivers, which provide the DC bias power required. Evolution Wireless receivers do not supply DC bias and cannot power this antenna.

Related Equipment and Workflow Compatibility

The A 3700 is designed for Sennheiser EM 2000, EM 2050, EM 3731, EM 3732, and EM 6000 receivers. It can be combined with Sennheiser antenna splitters and coaxial cables for distributed antenna systems in large venues.

Why Professionals Use This Type of Product

• Active amplification compensates for cable loss in long antenna runs
• Adjustable gain matches the antenna to the specific installation
• Wideband 470-866 MHz coverage handles multiple frequency ranges
• DC-powered via the receiver cable eliminates separate power requirements

Additional Compatibility Information

The Sennheiser A 3700 is an active omnidirectional receiver antenna with adjustable 5/10/15 dB gain, covering 470-866 MHz, powered via DC bias from Sennheiser 2000, 3000, and 6000 Series rackmount receivers.