Sennheiser EW IEM G4 Wireless Monitor System

Product Overview

The Sennheiser EW IEM G4 is a complete single-performer wireless in-ear monitor system built on the proven Evolution Wireless G4 platform. The package includes the SR IEM G4 stereo half-rack transmitter, one EK IEM G4 bodypack receiver, and a pair of IE 4 in-ear headphones — everything a vocalist, presenter, or monitor engineer needs to achieve professional stage monitoring without floor wedges. Operating in the UHF band with up to 42 MHz of bandwidth and 1,680 selectable frequencies, the system delivers stable, interference-resistant stereo transmission up to 300 feet line-of-sight. The single-user set is upgradeable to a TWIN configuration by adding a second EK IEM G4 bodypack, making it a cost-effective foundation for expanding in-ear monitoring rigs.

Product Description

The SR IEM G4 stereo transmitter is housed in a full-metal half-rack chassis with an OLED display for direct monitoring and control of transmit frequency, output power, and signal levels. It accepts a balanced stereo input from a mixing console and broadcasts that mix wirelessly to the EK IEM G4 bodypack worn by the performer. The transmitter supports up to 50 mW of RF output power (subject to regional regulations), providing the transmission strength needed for large stages and outdoor environments. Infrared synchronization between transmitter and receiver simplifies frequency matching — no manual frequency entry required.

The EK IEM G4 bodypack receiver features front-panel volume and squelch controls, allowing performers to adjust their monitor mix level directly during a performance without returning to the mix position. A headphone output accommodates the included IE 4 earphones or any standard 3.5 mm in-ear monitor. The IE 4 earphones deliver clear, balanced sound reproduction across the full frequency spectrum for reliable performance monitoring in loud stage environments. Up to 16 compatible IEM channels can operate simultaneously within a single frequency band, making the system suitable for mid-sized ensemble productions where several performers each require independent monitor mixes. Sennheiser Wireless Systems Manager (WSM) software compatibility enables centralized frequency coordination for multi-channel systems.

Key Features

• Complete Single-User IEM System — SR IEM G4 transmitter, EK IEM G4 bodypack receiver, and IE 4 earphones included in one package.
• 42 MHz UHF Bandwidth / 1,680 Frequencies — Wide tuning range with stable UHF operation away from Wi-Fi interference.
• Up to 16 Simultaneous IEM Channels — Supports ensemble productions with multiple independent monitor mixes.
• Up to 50 mW RF Output Power — Strong transmission for large stages and outdoor venues (region-dependent).
• 300 ft / 100 m Operating Range — Line-of-sight range covers standard stage-to-backline and pit monitor positions.
• Infrared Transmitter-Receiver Sync — Fast, error-free frequency pairing without manual frequency entry.
• EK IEM G4 Bodypack with Volume/Squelch Controls — Performer-adjustable monitor level and squelch threshold directly on the belt pack.
• OLED Display on Transmitter — Clear readout of frequency, output power, RF and audio levels for fast stage setup.
• All-Metal Transmitter Housing — Rugged half-rack chassis suitable for touring and permanent rack installations.
• WSM Software Compatible — Sennheiser Wireless Systems Manager enables network-based frequency coordination for complex multi-channel setups.
• Upgradeable to TWIN Set — Add a second EK IEM G4 bodypack to serve two performers from a single transmitter.
• IE 4 In-Ear Headphones Included — Balanced, full-spectrum in-ear headphones for daily stage use.

Typical Applications

• Lead vocalists and instrumentalists requiring personal monitor mixes on stage
• Presenters and speakers on corporate event and conference stages
• Worship team members at houses of worship
• Theater performers requiring discreet in-ear monitoring
• Broadcast talent monitoring program audio via IEM
• Monitor engineers deploying compact IEM systems for touring support acts
• Small-to-mid-size ensemble productions with up to 16 simultaneous IEM channels

Technical Specifications

Frequently Asked Questions

Q: What is included in the EW IEM G4 single set?

The EW IEM G4 single set includes the SR IEM G4 stereo half-rack transmitter, one EK IEM G4 bodypack receiver, and one pair of IE 4 in-ear headphones. A power supply, rack mount hardware, and documentation are also included with the transmitter.

Q: Can I upgrade the EW IEM G4 single set to support two performers?

Yes. The EW IEM G4 is designed to be upgradeable. Purchasing an additional EK IEM G4 bodypack receiver allows two performers to receive the same stereo monitor mix from the SR IEM G4 transmitter simultaneously. This configuration is called the TWIN set.

Q: How many EW IEM G4 systems can operate simultaneously?

Up to 16 compatible IEM channels can operate within the same frequency band simultaneously. For productions requiring more channels, careful frequency coordination via Sennheiser WSM software is recommended to avoid interference between systems.

Q: Can performers control their own monitor volume?

Yes. The EK IEM G4 bodypack receiver has dedicated volume and squelch controls on the unit itself. Performers can adjust their headphone level directly without requesting changes at the mix position, giving them real-time control of their personal monitor mix.

Q: What earphones are included, and can I use my own?

The IE 4 in-ear headphones are included with the set. The EK IEM G4 bodypack uses a standard 3.5 mm stereo output, so any compatible in-ear monitor headphone with a 3.5 mm connector can be substituted. Professional IEM earphones such as the Sennheiser IE 100 PRO or IE 300 are popular upgrades.

Q: How does the EW IEM G4 pair the transmitter and receiver?

Pairing is performed via infrared (IR) sync. Point the receiver's IR sensor toward the transmitter's IR port and press the sync button. The receiver adopts the transmitter's frequency automatically, eliminating manual frequency entry and reducing the risk of setup errors.

Q: Is the EW IEM G4 compatible with Sennheiser network management software?

Yes. The SR IEM G4 transmitter is compatible with Sennheiser Wireless Systems Manager (WSM) software, which enables network-based frequency planning, real-time monitoring, and coordination across multiple wireless systems. This is particularly useful for festival and touring rigs with many simultaneous IEM channels.

Q: Which frequency band should I choose for my region?

The EW IEM G4 is available in three bands: A (516–558 MHz), A1 (470–516 MHz), and G (566–608 MHz). Band selection depends on the locally available UHF spectrum in your region. Consult your local frequency coordination authority or Sennheiser's frequency finder tool to confirm which bands are available in your area before purchasing.