Sennheiser 503876 NT3-1-US Wireless Equipment Power Supply

The Sennheiser NT3-1-US (model 503876) is a 120V power supply designed as an OEM accessory for Sennheiser professional wireless audio equipment. It provides stable, regulated power to devices such as the Sennheiser AC 2 and AC 3 antenna combiners and the L2015G2 rackmount charger, all of which are common components in professional wireless microphone and in-ear monitor systems. As a genuine Sennheiser part, it is built to deliver the precise voltage and current specifications these devices require, reducing the risk of power-related issues during live performances, broadcasts, or installed sound applications.

The power supply uses a corded electric design with a 2-pin connector, allowing some distance between the wall outlet and the powered device. This is particularly useful in rack-mounted setups where outlets may not be immediately adjacent to the equipment. While it is a simple accessory, having the correct power supply is essential for maintaining the reliability of professional wireless systems, especially in mission-critical environments where power interruptions or incorrect voltage can cause signal dropouts or equipment damage. The NT3-1-US is rated for 120V AC input, making it appropriate for North American installations.