The Sennheiser SR IEM G4 Stereo Transmitter is a half-rack wireless transmitter designed to deliver monitor mixes to in-ear systems with clarity and minimal latency. Operating within the 520-558 MHz AS frequency band, this transmitter handles stereo audio transmission with a signal-to-noise ratio exceeding 90 dB and total harmonic distortion under 0.9%. The unit ships as a transmitter only, allowing engineers to configure custom IEM rigs around existing bodypack receivers or to expand multi-performer setups without redundant hardware. Dual XLR-3/¼" combo inputs accept electronically balanced signals, while a ¼" stereo jack output enables loop-through or auxiliary monitoring. Audio frequency response spans 25 Hz to 15 kHz, covering the full spectrum required for detailed mix reproduction on stage or in rehearsal. The BNC antenna output uses a 50 Ω connection for reliable RF distribution. At 980 grams and measuring approximately 202 x 212 x 43 mm, the transmitter fits neatly into rack-mounted wireless ecosystems or portable pedalboard-style rigs. Included with the unit are an NT 2-3 power supply, rod antenna, GA 3 rackmount hardware, and quick-start documentation. The AS frequency range complies with Australian spectrum allocations, ensuring interference-free operation across venues and production environments. Firmware updates and detailed frequency charts are available via download, supporting ongoing compatibility with evolving wireless standards. The SR IEM G4 integrates directly with Sennheiser's EK IEM G4 bodypack receivers, forming a reliable stereo monitoring chain for live performance and fixed installations. Features 520-558 MHz AS frequency band for Australian spectrum compliance Stereo wireless transmission with over 90 dB signal-to-noise ratio 25 Hz to 15 kHz audio frequency response for full-range monitoring Dual XLR-3/¼" combo inputs, electronically balanced for flexible connectivity Total harmonic distortion below 0.9% for transparent audio delivery BNC antenna output with 50 Ω impedance for stable RF transmission Half-rack design at 980 grams with included GA 3 rackmount hardware ¼" stereo jack output enables loop-through or auxiliary monitoring