Sennheiser EW IEM G4-TWIN-C Monitor Set, Evolution Wireless G4, 734-776MHz (New Code 509629)

Sennheiser EW IEM G4-TWIN-C Wireless In-Ear Monitoring Set

The Sennheiser EW IEM G4-TWIN-C (Article Number/New Code: 509629) is a professional, dual-user wireless stereo in-ear monitoring (IEM) configuration from the industry-standard Evolution Wireless G4 series. Housed in rugged, metal-enclosed components, the "TWIN" package is configured to supply identical, high-fidelity monitoring mixes to two separate performers simultaneously out of a single transmitter footprint. This makes it an ideal, cost-effective setup for duos, band members, backing vocalists, theater performers, and houses of worship.

This system operates on the C Band frequency spectrum (734.000 MHz to 776.000 MHz). This broad 42 MHz switching bandwidth provides up to 1,680 selectable UHF frequencies, allowing engineers to coordinate a clean, stable, and drop-free audio link even in crowded multi-channel RF environments.

Key System Performance and Integration Attributes

• Simultaneous Two-Performer Monitoring: Out of the box, the system bundles one half-rack stereo transmitter with two premium independent bodypack receivers and two sets of professional earphones, removing the need to buy secondary expansion hardware to cover two users.

• Variable RF Output Power: The transmitter features switchable RF power levels—Low (10 mW), Standard (30 mW), and High (50 mW). This allows the system to easily scale from small indoor rehearsal spaces up to expansive festival main stages while managing local RF interference.

• Sennheiser HDX Compander Technology: Utilizes Sennheiser’s proprietary HDX companding architecture to optimize the signal-to-noise ratio (greater than 90 dB). This dramatically reduces transmission background hiss, delivering studio-grade clarity across a flat 25 Hz to 15,000 Hz frequency range.

• Network Integration via WSM Control: Features a built-in RJ45 Ethernet port on the transmitter rear panel, allowing direct connection to a local network switch. Production crews can manage advanced frequency coordination, live RF environment scans, and multi-channel telemetry using the Sennheiser Wireless Systems Manager (WSM) software tool.

• Adaptive Diversity & Robust Interlocking: The bodypack receivers leverage adaptive diversity technology, utilizing the headphone cable as a secondary antenna to minimize dropouts. All audio routing connections feature heavy-duty locking mechanisms to handle intense on-stage movement.

Technical Specifications Matrix

In the Box: Production Package Inventory

• 1 x SR IEM G4 Stereo Monitor Transmitter

• 2 x EK IEM G4 Stereo Bodypack Receivers

• 2 x Pairs of IE 4 In-Ear Earphones (with exchangeable alternative eartips)

• 1 x Rod Antenna (BNC Connection)

• 1 x GA 3 Rackmount Kit (For secure single/dual mounting into standard 19-inch audio racks)

• 1 x NT 2-3 Power Supply with regional wall adapters

• 4 x AA Alkaline Batteries

• 1 x Quick Start Guide & 1 x Safety Instructions

Field Configuration and Multi-User Deployment Advice

Stereo, Mono, and Focus Mode Optimization: When using the TWIN package, ensure your transmitter settings complement your staging needs. In default Stereo mode, both performers will hear the same left/right stereo image. However, by running the system in Mono mode, you can send Mix A on the Left channel and Mix B on the Right channel. Performers can then adjust the Focus Mode balance directly on their EK IEM G4 bodypacks to blend between their personal feed and the global band mix, giving each user a personalized balance out of one transmitter footprint.

Proper Earphone Sealing and Cable Routing: The included IE 4 earphones deliver broad bass response and clear top-end detail, but this hinges completely on establishing a proper acoustic seal inside the ear canal. Test the alternative silicone ear tips included in the box to find the tightest personal fit. When putting on the gear, route the thin earphone cable up and over the outer ear flap and drop it down the back under the performer's shirt to prevent instruments or wardrobe changes from snagging the line.