Sennheiser SR IEM G4-C Monitor Transmitter, Evolution Wireless G4, 734-776MHz
Sennheiser SR IEM G4-C Monitor Transmitter, Evolution Wireless G4, 734-776MHz is backordered and will ship as soon as it is back in stock.
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Sennheiser SR IEM G4-C Wireless Stereo Monitoring Transmitter
The Sennheiser SR IEM G4-C is a professional, half-rack wireless stereo in-ear monitoring (IEM) transmitter from the industry-standard Evolution Wireless G4 series. Housed in a rugged, full-metal chassis, it is engineered to deliver pristine, high-fidelity monitor mixes with ultimate RF reliability for touring musicians, theater productions, houses of worship, and broadcast studios.
This specific variant operates on the C Band frequency spectrum (734.000 MHz to 776.000 MHz). This 42 MHz switching bandwidth provides up to 1,680 selectable frequencies, allowing engineers to anchor a clean, intermodulation-free RF link even in crowded local wireless environments.
Key System Performance and Integration Attributes
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Variable RF Output Power: Features switchable RF transmission power—Low (10 mW), Standard (30 mW), and High (50 mW). This allows monitors to adapt natively to the environment, maximizing range and line-of-sight penetration on large festival stages while preventing intermodulation overload in tighter, multi-system studio spaces.
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Sennheiser HDX Compander Technology: Utilizes Sennheiser’s proprietary HDX companding architecture to maximize the signal-to-noise ratio (greater than 90 dB). It drastically minimizes standard analog transmission hiss, ensuring studio-grade acoustic clarity across a flat 25 Hz to 15,000 Hz monitoring spectrum.
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Network Integration & WSM Software Control: Outfitted with an integrated RJ45 Ethernet port, the transmitter hooks directly into network switches. This permits multi-channel coordination, remote tracking, and live RF environment charting using the Sennheiser Wireless Systems Manager (WSM) software platform.
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Flexible Audio Routing Architecture: The back panel features dual balanced XLR-1/4" combo inputs for incoming stereo/mono mixes, alongside dual balanced Loop Out 1/4" TRS jacks. This allows the incoming monitor mix to be chained directly to adjacent transmitters or multi-track recording matrices without requiring passive signal splitters.
Technical Specifications Matrix
| Feature Parameter | Hardware Specification Profile |
| Model Reference Name | SR IEM G4-C |
| RF Operational Band | C Band Block (734.000 MHz to 776.000 MHz) |
| Switching Tuning Bandwidth | Up to 42 MHz available within the C Band |
| Modulation Mode Alignment | Wideband FM Stereo (MPX Pilot Tone architecture) |
| Frequency Bank System | 20 Factory Banks (up to 16 presets) / 6 User Banks (16 programmable slots) |
| RF Output Power (at 50 Ohm) | Switchable: Low (typ. 10 mW) / Standard (typ. 30 mW) / High (typ. 50 mW) |
| Audio Compander Matrix | Sennheiser HDX |
| Audio Frequency Response | 25 Hz to 15,000 Hz |
| Maximum Audio Input Level | +22 dBu |
| Total Harmonic Distortion (THD) | Less than or equal to 0.9% (at 1 kHz and nominal deviation) |
| Signal-to-Noise Ratio (S/N) | Greater than 90 dB (at rated input and peak deviation) |
| Audio Input Nodes | 2 x XLR-1/4" (6.3 mm) TRS Balanced Combo Sockets |
| Audio Loop Output Nodes | 2 x 1/4" (6.3 mm) TRS Balanced Loop-Out Sockets |
| Network Interface Node | 1 x RJ45 Ethernet Port |
| Antenna Interface Node | 1 x BNC Socket (50 Ohm impedance) |
| Physical Housing Profile | Half-Rack Space / Full-Metal Construction |
| Net Hardware Weight | Approx. 980 grams |
In the Box: Component Inventory
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1 x SR IEM G4 Stereo Monitor Transmitter (C Band)
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1 x Rod Antenna (BNC Connection)
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1 x GA 3 Rackmount Kit (For secure single/dual mounting into standard 19" audio racks)
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1 x NT 2-3 Power Supply with regional wall adapters
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1 x Quick Start Guide & 1 x Safety Instructions
Field Configuration and RF Best Practices
Stereo vs. Mono / Focus Mode Configuration: Ensure the transmitter’s internal menu match-pairs with your performer’s bodypack receiver setup. If you are sending two distinct monitor mixes (e.g., Mix 1 on Left, Mix 2 on Right), set the transmitter to Mono mode. This allows the performer to use Sennheiser's Focus Mode on their EK IEM G4 receiver to balance and pan between their own instrument/vocal volume and the global band mix natively from the stage floor.
Optimizing Antenna Line-of-Sight: To avoid dropouts and ensure standard 100-meter (300 feet) operational tracking, the BNC rod antenna should ideally be line-of-sight to the stage performers. If you are mounting the SR IEM G4 deep inside a metal flight case or server enclosure, use the included GA 3 front-mount hardware panel to bring the BNC connection straight to the front plate of the rack face, away from shielding metal chassis layers.


