Sennheiser ew IEM G4-Twin Wireless Monitor System Kit (G: 566 to 608 MHz)

The Sennheiser 509615 is a complete ew IEM G4 Twin Wireless Monitor System that delivers clear, dependable in ear monitoring for live performers, broadcast talent, and theater crews who need absolute confidence in what they hear on stage or set. By combining proven RF technology with practical features that speed up setup, it lets artists focus on the show rather than the gear.

At the center of the kit is the SR IEM G4 transmitter, a unit with a durable metal housing that mounts in a half rack and presents an OLED screen for immediate feedback on frequency, output power, and audio levels. Two EK IEM G4 beltpack receivers give separate mixes to two performers, and each receiver ships with IE 4 earphones that reproduce the full spectrum of a live mix with surprising detail.

The system covers 566 to 608 MHz and offers 42 MHz of tuning bandwidth, providing up to 1680 selectable frequencies. That wide window makes it easy to find a clean channel, even in venues that are crowded with wireless microphones and other RF devices. A transmission range of up to 300 feet means the talent can move across large stages, catwalks, or arena floors without signal dropouts.

Day to day use is straightforward. A single button push engages infrared sync, sending all frequency and name data from the transmitter to each receiver in seconds. Sennheiser WSM software extends control to a computer, allowing engineers to coordinate multiple systems in complex productions. On the beltpack, a clear display shows remaining battery life, and a limiter that can be adjusted from -18 dB to -6 dB helps protect hearing during unpredictable volume spikes.

This package fits naturally into touring rigs, fixed installations in houses of worship, corporate events that call for discreet communication, and theater shows where every cue must be heard without fail. With long battery life from standard AA cells, a robust RF front end that can push up to 50 mW when conditions demand it, and the audio quality Sennheiser is known for, the 509615 kit stands ready for demanding professional use.

• Operates in the 566 to 608 MHz range with 42 MHz tuning bandwidth
• Includes one SR IEM G4 transmitter with metal housing, two EK IEM G4 beltpack receivers, and two IE 4 earphones
• Provides 1680 selectable frequencies for clean channels in RF dense venues
• Up to 300 foot transmission distance gives performers freedom to move
• OLED screen on the transmitter offers clear system status at a glance
• Infrared syncing pairs the transmitter and receivers in seconds
• Works with Sennheiser WSM software for advanced frequency coordination
• Adjustable RF output power up to 50 mW helps overcome challenging environments
• Built in limiter in each receiver protects hearing and can be set from -18 dB to -6 dB
• Runs up to six hours on standard AA batteries or rechargeable equivalents