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Sennheiser

Sennheiser ew IEM G4-TWIN-A Wireless Monitor System

Sennheiser's ew IEM G4 Twin delivers broadcast-grade wireless in-ear monitoring for two performers simultaneously, with 42 MHz of tunable UHF headroom built for crowded festival stages.

$1,093.20*$1,499.00Save 27%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Sennheiser ew IEM G4 is Sennheiser's established professional-tier wireless in-ear monitoring platform, and the Twin configuration packages a single stereo rack transmitter with two bodypack receivers — making it purpose-built for duos, side-by-side performers, or scenarios where a monitor engineer and a performer share the same reference mix. Operating in the UHF A band (516–558 MHz), the system provides 42 MHz of tunable bandwidth with 1680 discrete selectable frequencies. That depth of frequency choice matters in festival and touring contexts where the RF environment is dense: having room to maneuver across 42 MHz means the G4 can coexist cleanly alongside IEM systems, wireless mic systems, and broadcast links from neighboring stages. Up to 16 simultaneous G4 channels can share a frequency range without intermodulation issues, giving production teams genuine scalability.

The SR IEM G4 transmitter is half-rack width and built in full-metal housing, which reflects Sennheiser's understanding of how this gear gets treated on the road — racked, de-racked, and driven across timezones. The OLED display provides clear, readable parameter feedback under stage lighting. Transmission range is rated to 100 meters, though working range in a real environment — with bodies, cases, and structures absorbing and deflecting signal — is more practically in the 30–50 meter range from standard rack antenna positions. Investing in antenna distribution extends that working range meaningfully and is standard practice on larger productions. As a renewed unit, the G4's all-metal construction and Sennheiser's component quality mean the platform holds up well through the inspection process — this is a system designed to outlast its original purchase cycle.

Key Features

Up to 42 MHz bandwidth with 1680 selectable frequencies fully tunable in A stable UHF range

Transmission range: up to 100 meters/ 300 feet

Rugged all-in-one wireless monitoring system for in-ear applications

Up to 16 Simultaneous channels per frequency range

Half-rack stereo transmitter in A full-metal housing with oiled display for full control

Specifications

Frequency Range (A Band)
516–558 MHz
Bandwidth
Up to 42 MHz
Selectable Frequencies
1680
Transmission Range
Up to 100 meters / 300 feet
Simultaneous Channels
Up to 16 per frequency range
Transmitter Form Factor
Half-rack, 1U, full-metal housing
Kit Contents
1x SR IEM G4 Stereo Transmitter, 2x EK IEM G4 Bodypack Receivers
Condition
Renewed (professionally inspected)

Pros & Cons

👍 Pros

  • 1680 selectable frequencies across a 42 MHz UHF bandwidth give this system genuine flexibility in crowded RF environments — you can find a clean channel even at large multi-act events.
  • The all-metal full housing on the SR IEM G4 transmitter feels built for touring — no plastic panels that flex under rack pressure or road vibration.
  • Up to 16 simultaneous channels per frequency range makes the ew G4 scalable across a full band or broadcast production without system conflicts.
  • The twin bodypack configuration makes this a practical solution for two performers sharing a monitor mix without purchasing separate systems.
  • Sennheiser's frequency coordination tools simplify channel management across multiple G4 units in the same production.

👎 Cons

  • Both bodypacks receive an identical mix — there is no per-receiver independent mix capability from a single transmitter, which limits the Twin configuration for productions where performers need different IEM mixes.
  • 100-meter line-of-sight range drops significantly in real stage environments with physical RF obstructions; antenna distribution is recommended for larger stages.
  • The A-band frequency range (516–558 MHz) must be verified against local frequency regulations — licensing requirements vary by country and region.
  • As a half-rack transmitter, side-by-side rackmounting requires careful cable management to avoid RF interference from adjacent units.

Frequently Asked Questions

The Twin kit includes a single SR IEM G4 stereo rack transmitter and two EK IEM G4 bodypack receivers. Both bodypacks receive the same stereo mix from the transmitter — it doesn't support two independently mixed feeds. For separate mixes per performer, you'd need two independent transmitters.
Up to 16 channels per frequency range can run simultaneously. In the A band (516–558 MHz), that means up to 16 ew IEM G4 systems operating at once without intermodulation conflicts, provided frequencies are coordinated properly.
Rated up to 100 meters (300 feet) line-of-sight. Real-world stage environments with bodies, equipment, and physical obstructions will reduce that figure — typical reliable working range in a dense live setting is closer to 30–50 meters. Proper antenna placement remains essential.
The SR IEM G4 transmitter is half-rack width and 1U in height, so two units can be rackmounted side-by-side in a single rack unit. It's designed for standard 19-inch rack integration.
Yes — this listing is for a professionally inspected renewed unit. Sennheiser's ew G4 platform is known for long service life, and the all-metal housing on the transmitter holds up to the inspection and refurbishment process well. As always with renewed RF gear, verify frequency coordination for your region before assuming A-band availability.

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