Sennheiser SR IEM G4-A Monitor Transmitter, Evolution Wireless G4, 516-558MHz

Here is the updated layout for the Sennheiser SR IEM G4-A. This version uses standard, plain Markdown text and removes all mathematical font formatting to ensure it copies and pastes cleanly without any display errors.

Sennheiser SR IEM G4-A Wireless Monitor Transmitter

The Sennheiser SR IEM G4-A (Article Number: 508191) is a professional, half-rack wireless stereo transmitter operating in the A-Band (516 - 558 MHz) frequency spectrum. As the command center of the Evolution Wireless G4 (ew G4) series in-ear monitoring ecosystem, it is designed for grueling daily use on live music tours, houses of worship, theater stages, and broadcast sets.

The transmitter acts as the primary link to beam high-fidelity, low-latency stereo or dual-mono monitor mixes from a mixing console directly to performers wearing the matching EK IEM G4 bodypack receiver.

Key System Performance and RF Attributes

• Robust Multi-Channel Coexistence: Operating in the ultra-reliable UHF frequency range, the SR IEM G4 features up to 1,680 selectable frequencies tunable across a wide 42 MHz switching bandwidth. It includes an enhanced frequency bank system with up to 16 compatible, intermodulation-free factory presets for rapid multi-channel setup.

• Variable RF Output Power: Sound engineers can toggle the RF transmission power between three distinct levels: 10 mW (Low), 30 mW (Standard), and 50 mW (High). This flexibility allows technicians to comply with local regulatory limits, maximize battery performance on site, or boost output power to blast through high-interference RF environments.

• Integrated Stereo / Focus Mode Control: The system transmits a full-bandwidth audio signal that can be received in true stereo or configured into Sennheiser's advanced Focus Mode (Dual Mono). Focus Mode allows two independent monitor mixes to be sent on a single RF frequency, giving the performer the ability to balance their own volume relative to the band mix using their bodypack controls.

• In-Loop Ethernet Network Sync: Equipped with a rear-panel RJ45 Ethernet port, the transmitter can be networked into multi-unit systems. Technicians can deploy Sennheiser’s Wireless Systems Manager (WSM) software to perform remote frequency coordination, multi-transmitter configuration syncs, and live RF spectrum monitoring.

Technical Specifications Matrix

In the Box: Component Bundle Inventory

Rigging and RF Optimization Guidelines

Separate Transmitters and Receivers: To maintain clean RF performance and avoid front-end overload, always separate your wireless monitor transmitters from your wireless microphone receivers in your equipment racks. If they must sit in the same flight case, use a dedicated antenna combiner (like the Sennheiser AC 41) to cleanly combine your SR IEM G4 signals out to a single high-gain directional paddle antenna mounted high above the stage.

Protect Your Audio Loop-Throughs: The rear-panel passive loop-through outputs (1/4" jacks) allow you to copy the incoming audio signals and daisy-chain them to alternative monitor transmitters, recorders, or secondary mixing hardware. Ensure you use balanced TRS cables for these lines to prevent electromagnetic hum, buzz, or signal degradation across your audio distribution path.