The Sennheiser AB 3700 is a high-quality RF antenna preamplifier designed to boost signal strength by providing 5/10/15 dB gain to overcome losses in antenna cables. Featuring effective RF interference suppression, it is ideal for professional wireless systems.
The Sennheiser AB 3700 is an RF antenna preamplifier built to enhance the performance of wireless microphone systems by compensating for signal losses in antenna cables. This compact yet durable device provides selectable 5/10/15 dB gain to improve signal strength and maintain clarity. The LED indicators next to the BNC connectors display the selected gain, and the unit can be switched to Bypass mode (-3 dB) when no amplification is needed. Powered directly from the antenna cable via the EM 2000/2050/373x receiver or ASA 3000 splitter, the AB 3700 ensures effective RF interference suppression for clean transmission.
With a robust metal design, it offers durability and reliability for both indoor and outdoor environments, making it an excellent choice for professional audio setups. The preamplifier is easy to mount, with a 5/8″ thread that reduces to 3/8″ for secure attachment to a stand.
Key Features:
- Adjustable gain: Selectable 5/10/15 dB gain for better signal reception
- Bypass mode: Switchable to -3 dB bypass when amplification is not required
- LED indicators: Clearly displays selected gain next to the BNC connectors
- Effective RF interference suppression for clean and stable transmission
- Durable metal housing designed for reliable, long-term use
- Versatile mounting options: Includes 5/8″ thread with reduction to 3/8″ for easy stand mounting
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1 Sennheiser AB 3700 RF antenna preamplifier
- Antenna Connector: BNC
- Frequency Range: 470 – 866 MHz
- Weight: 265 g
- Nominal Impedance: 50 Ohms
- Power Supply: 9 – 15 V DC
- Supply Current: Max. 350 mA, typical 130 mA
- Amplifier Gain: Bypass (-3)/5/10/15 dB
- Microphone Application: Accessories
