Sennheiser ew IEM G4-TWIN-A1 Wireless In-Ear Monitor System

The Sennheiser ew IEM G4-TWIN-A1 is a professional wireless in-ear monitoring system engineered for demanding live performance and touring applications. The system centers around a half-rack stereo transmitter housed in a full-metal enclosure with an OLED display, providing precise control over frequency selection, output levels, and monitoring mix. With up to 42 MHz of bandwidth and 1680 selectable UHF frequencies within the 470–516 MHz A1 range, the system offers extensive flexibility to find clean channels even in crowded RF environments. Up to 16 systems can operate simultaneously within the same frequency range, making it scalable for large productions with multiple performers.

The TWIN designation means this package includes two bodypack receivers, each equipped with IE 4 earbuds, allowing two performers to receive independent stereo monitoring from a single transmitter unit. Each bodypack runs on 2 AA batteries for up to 6 hours of wireless operation and provides a transmission range of up to 100 meters (300 feet). The rackmount kit included in the package allows for clean integration into standard equipment racks alongside other audio gear. Whether you are outfitting a touring band, a theater production, or a house of worship, the ew IEM G4-TWIN-A1 delivers the signal stability, build quality, and channel capacity that professional audio monitoring demands.