SKU: 97870525203

Sennheiser SR IEM G4-C Monitor Transmitter, Evolution Wireless G4, 734-776MHz

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Description

Sennheiser SR IEM G4-C Monitor Transmitter, Evolution Wireless G4, 734-776MHzSennheiser 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

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

  • 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.

  • 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.

  • 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.

  • 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

  • 1 x SR IEM G4 Stereo Monitor Transmitter (C Band)

  • 1 x Rod Antenna (BNC Connection)

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

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

  • 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.

Shipping Notes
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SKU: 97870525203

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4.6 ★★★★★
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Talagand
Belleville, US
★★★★★ 4
Reasonably adequate room divider
Size: 4 Panel-88'', Color: Beige
I'm reviewing this as I assemble it. Couple things: 1. I didn't expect as much assembly. I've ordered dividers before and they more-or-less came as one unit. Sometimes the panels needed screwing together. These require complete assembly and come largely as three rods: two make up vertical columns and snap together. Another one (called part "C") makes the horizontal columns and you have two of these per panel (one attaches to part "A" and the other part "B"). These parts are metal with a plastic shim. Using the wood screws to attach to part "C" is a real pain in the neck. There's not much holding the panel in place so it's a little tricky. One tactic I've found while I'm assembling that works for the initial connections from parts A and B to their respective "C" rods is to hold the screw in place with a screw driver and then rotating the rod around the screw. This will do a number on your hands if you aren't wearing gloves. This obviously doesn't work when completing the connection. Using a driller driver on this is really near impossible because there isn't anything you can use to secure it in place. You can use it on the first panel, but as it gets longer, it becomes increasingly difficult and because it isn't wood, it's really tight. I considered drilling larger pilot holes but since there are only 4x4=16 screws I need to screw in, I just decided to use my screw driver to complete it. 2. Also related to assembly. When completing the panels (attaching parts "A" and "B" to parts "C" that have the cloth cover on it), you have to be careful that when you tighten that side that it isn't loosening the other side. Because the pilot holes are so tight, you can end up rotating the rod, which rotates it in the same direction as looser on the original side. Having someone hold the "C" rod in place while you screw it in is probably the easiest approach. I didn't have a 2nd person, so I just had to keep flipping back and forth and tightening both sides as I screwed it in. Not the worlds biggest deal, but annoying nonetheless. 3. The way the instructions are written, they seem to suggest building this thing progressively; that is, you do panel 1, then 2, connect them together, then do 3 and connect it, etc. I took a different route that I suspect saved me quite a bit of trouble, and I assembled all four panels first and THEN connected everything together. 4. For the love of God make sure you check that the plastic tip is on the same side for every panel. Otherwise, you have to take one side apart again and reverse it. On the bright side, if this happens, you've essentially bored out the pilot holes to be the correct size... which is having me question if I shouldn't have just bored them out to the appropriate width in the first place. 5. Attaching all of the panels together is also an enormous pain in the ass unless you happen to have an 88" long elevated surface. Attaching the legs either requires you to elevate one side, which will invariably twist the inexplicably cheap material in the bottom connectors... or you can attach them sideways... or you can put this thing upright, having two people hold the panels in place while you use the allen wrench to tighten the bolts on the underside. None of those are particularly great options. NOW on to the utility itself. 1. The panels do let some light through (I didn't believe their advertising, and that was one of the reasons that I bought beige, is that I wanted it to not be too dark). They aren't transparent though, so it isn't that far off from their description. They functionally work great, and keep the mess of wires hidden and when I'm sitting at my desk, actually reflect quite a bit of light into my office. Great! 2. My wife has described these as "the most hideous piece of furniture ever conceived of by man." So it does not have spouse approval factor. Granted, she will seldom be in my office area, so that isn't the end of the world. 3. These are really hard to align in a way that doesn't look a little tacky. There are some plastic connectors but they don't do a bang up job of keeping these in place. Each panel is slightly tilted and it's... quite obvious. I may at some point make my own improvements to these to help make them more level. It's not a particularly expensive product so I wasn't expecting much so it's fine and I'm not going to ding them on the rating because of it. All said, would I buy this product again? Probably not. It's assembly was ~90 minutes which is about 75 minutes longer than I was anticipating spending on this (not including the 5 minute writeup that I'm doing here). But am I going to return it? Also no, if for no other reason I'd be just as annoyed taking it apart and putting it in the original box to return it.
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Reviewed in the United States on October 31, 2023
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Verified Purchase
Amazon Customer
Grantham, US
★★★★★ 5
Good Product
Size: 3 Panel-102'', Color: Beige
I got these dividers for outdoor use for some privacy from neighbors. They arrived quickly and were easy to set up. They look good, and though the legs don’t offer stability against any amount of wind—which I expected as it wasn’t advertised for outdoor use—all it took was placing a cinder block on the feet to hold it up right. Coverage is good, it’s easy to fold and move as needed, and it’s light weight. All in all a decent product. I will caution the purchase of “used like-new,” as both of the dividers I ordered were previously returned items, and one came missing a cap, instructions were not included, and the poles were all mixed up and not properly labeled. If I had not ordered a second divider (which did include the instructions) I would have had a much harder time figuring out which pieces were which and how to put them together.
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Reviewed in the United States on May 30, 2025
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Verified Purchase
julie h.
Charlottesville, US
★★★★★ 5
So versatile! Perfect solution for dividing a room.
Size: 4 Panel-88'', Color: Grey, Size: 4 Panel-88'', Color: Grey
Perfect solution for my space. My office has to double as the hangout room for the kids and I wanted something that would block off my computer so it is left alone. This space allows me to close off my computer as much or as little as I want. It is lightweight yet has sturdy feet. This is important so that if it gets bumped it won’t topple over. The price was great and the build time wasn’t too bad! I would recommend two people for set up. I went with the grey panels and I think I’ll end up hanging some twinkle lights at some point. Great purchase!
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Reviewed in the United States on October 9, 2025
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Verified Purchase
Abbi
San Leandro, US
★★★★★ 4
4/5 Stars
Size: 4 Panel-88'', Color: Black
Very tall and easy to set up, the only thing I will say is that they do have large gaps in between, so you won't have 100% privacy unless you add a curtain in the back. Other than that, they are easy to fold, sturdy, and esy to assemble. The gaps are an easy fix so I would say they are worth it.
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Reviewed in the United States on April 16, 2026
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Tyi Campbell
Alexandria, US
★★★★★ 5
Great product and worth the money.
Size: 4 Panel-88'', Color: Black
Portable and stable. Perfect size and gives me the privacy I need when working from home. Stability is great as long as you place the stands correctly it won't wobble. I love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026

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