Sennheiser EW IEM G4-TWIN Wireless Monitor System Kit

Product Overview

The Sennheiser EW IEM G4-TWIN is a complete dual-performer in-ear monitoring system built on the proven Evolution Wireless G4 platform. The kit includes one SR IEM G4 half-rack stereo transmitter and two EK IEM G4 bodypack receivers with two pairs of IE 4 earphones, giving two performers simultaneous wireless monitoring from a single transmitter. Operating in the UHF band with up to 42 MHz of tunable bandwidth and 1,680 selectable frequencies, the system offers the RF flexibility and transmission reliability required for professional live performance environments. Infrared sync, an OLED display, and compatibility with Sennheiser WSM software make it straightforward to deploy and manage.

Product Description

In-ear monitoring systems serve a critical function in live production: they deliver a personalized, low-latency stereo mix directly to performers while isolating them from the stage wash and front-of-house audio. The EW IEM G4-TWIN packages everything needed for two performers to monitor wirelessly from a single transmitter, making it an efficient and cost-effective solution for bands, praise teams, broadcast talent, and theatrical productions where multiple performers require independent monitoring from the same mix feed.

The SR IEM G4 rack transmitter occupies half a rack space and outputs a stereo audio signal to both EK IEM G4 bodypacks simultaneously. Its full-metal housing and OLED display provide clear channel and frequency readout under stage lighting. Audio is fed to the transmitter via two combo XLR/TRS inputs, allowing connection directly from a mixing console's monitor outputs, aux sends, or monitor matrix. RF output power is adjustable up to 50 mW (subject to regional regulations), extending usable range to approximately 100 meters (300 feet) in open-air conditions.

Each EK IEM G4 bodypack receiver is a compact, belt-worn unit with a stereo 1/4" (6.3 mm) headphone output, individual volume control, and an OLED display for frequency and battery status. The adaptive diversity receiver circuit continuously selects the stronger of two antenna paths to maintain signal integrity during movement. Infrared sync between transmitter and receiver takes seconds, and the system supports up to 16 compatible channels operating simultaneously in the same frequency range—critical for larger productions with multiple IEM and wireless microphone systems sharing the RF environment.

The G4 series is compatible with Sennheiser Wireless Systems Manager (WSM) software for centralized frequency coordination, allowing the EW IEM G4-TWIN to be managed alongside other G4 wireless components. The system ships with two AA batteries, a GA 3 rack mount kit for the transmitter, and a rod antenna. Available in three frequency variants (A: 516–558 MHz, A1: 470–516 MHz, G: 566–608 MHz)—select the variant appropriate for your regional RF environment.

Key Features

• Twin Bodypack Kit — Includes 1x SR IEM G4 transmitter and 2x EK IEM G4 bodypacks for complete 2-performer monitoring from one transmitter.
• 2x IE 4 Earphones Included — Both performers receive in-ear monitors; no additional earphone purchase required.
• 42 MHz Tunable Bandwidth — 1,680 selectable frequencies for precise RF coordination in congested spectrum environments.
• Up to 16 Compatible Simultaneous Channels — Scalable for larger productions with multiple wireless systems sharing the same frequency range.
• Up to 100m Transmission Range — RF output up to 50 mW provides reliable coverage across large stages and production environments.
• Stereo Audio Transmission — True stereo monitoring signal from transmitter to each bodypack for full stereo mix delivery.
• Adaptive Diversity Reception — Each EK IEM G4 bodypack continuously selects the stronger antenna path for dropout-free monitoring.
• Infrared Sync — Fast, reliable frequency synchronization between transmitter and receiver without menu navigation.
• Half-Rack SR IEM G4 Transmitter — Full-metal housing with OLED display; two XLR/TRS combo inputs for direct console connection.
• WSM Software Compatible — Sennheiser Wireless Systems Manager integration for centralized frequency coordination and RF monitoring.
• GA 3 Rack Mount Kit Included — SR IEM G4 mounts in a standard 19" rack using the included GA 3 hardware.
• Three Frequency Variants — Available in A (516–558 MHz), A1 (470–516 MHz), and G (566–608 MHz) to match regional spectrum conditions.

Typical Applications

• Live concert touring and club-level productions
• Houses of worship with praise bands and worship teams
• Broadcast production where talent requires discrete monitoring
• Theater and musical productions with multiple performers
• Corporate events and conference productions
• A/V rental and staging companies requiring versatile IEM inventory

Technical Specifications

Frequently Asked Questions

Q: What is included in the EW IEM G4-TWIN kit?

The kit includes one SR IEM G4 stereo rack transmitter, two EK IEM G4 bodypack receivers, two pairs of IE 4 earphones, two AA batteries, one rod antenna, and one GA 3 rack mount kit for the transmitter. Each performer receives their own bodypack and earphones.

Q: Can both performers receive different mixes from the EW IEM G4-TWIN?

No. The SR IEM G4 transmits a single stereo mix. Both EK IEM G4 bodypacks receive the same stereo signal. For fully independent mixes per performer, a separate SR IEM G4 transmitter and frequency band would be required for each performer.

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

Up to 16 compatible channels can operate simultaneously within the same frequency range. For larger productions, additional compatible channels may be available across different G4 frequency bands with proper coordination using Sennheiser WSM software.

Q: Which frequency variant should I purchase?

Select the variant that falls within your local approved RF spectrum. In the United States, the A (516–558 MHz) and G (566–608 MHz) ranges are commonly used; however, spectrum conditions vary by region and venue. Check local regulations and any site-specific RF conflicts before purchasing.

Q: Does the EW IEM G4-TWIN work with Sennheiser WSM software?

Yes. The EW IEM G4-TWIN is compatible with Sennheiser Wireless Systems Manager (WSM), which allows centralized frequency coordination, channel naming, and RF monitoring across all G4 series components on a network.

Q: What audio sources can connect to the SR IEM G4 transmitter?

The SR IEM G4 accepts audio via two combo XLR-3 / 6.3 mm TRS inputs (electronically balanced). This allows direct connection from mixing console monitor outputs, aux sends, monitor matrix outputs, or any balanced line-level source.

Q: How long do the bodypack batteries last?

Each EK IEM G4 bodypack operates for approximately 4 to 6 hours on two AA batteries, depending on RF output settings and volume level. Rechargeable AA batteries are compatible but may result in slightly reduced operating time.

Q: Is the EW IEM G4-TWIN compatible with other EW G4 components?

The SR IEM G4 transmitter is specific to the IEM system and does not function as a microphone receiver. Additional EK IEM G4 bodypacks can be synchronized to the same SR IEM G4 transmitter to expand the system to more than two performers sharing the same mix.