The Sennheiser EM 300 G4 is the half-rack bodypack/handheld receiver in the Evolution Wireless G4 line — a single-channel receiver typically paired with an SKM 500 G4 handheld or SK 500 G4 bodypack for vocals and wireless instruments. One EM 300 G4 handles one vocalist or musician; chain several in a rack using BNC antenna distribution (RF Venue Distro4, Sennheiser ASA 1) to avoid forest-of-whips antennas sprouting from the rack front.
~$749Use retailer rows for current price and stock
01 · What it does—and what that changes in your rig.
Product overview
Start with the payoff, then work through how it functions, where it fits, and the details that change a real build.
The payoff
Wireless Mic decisions, organized around the whole rig.
The EM 300 G4 is Sennheiser's half-rackThe standard slice of rack height: 1U = 1.75″. A 3U box takes three slices; half-rack gear pairs two units side by side in one. single-channel receiver in the Evolution Wireless G4 line — the box that turns one RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. signal into one audio channel. Pair it with an SKM 500 G4 handheld or SK 500 G4 bodypack and you have a complete wireless channel for a vocalist, acoustic guitar, or whatever else needs to cut the cable. It handles exactly one source. If you're running four wireless channels, you're mounting four of these, which is where rack planning actually starts to matter — two units share a single rack unit when coupled in a half-rack tray, so a fully wireless band can stay surprisingly compact.
Documented outputs
33 destination connections
Documented inputs
3Based on documented inputs
Rack space
1U · half-rackBuilder checks available rail space
Photo: Sennheiser1U · half-rack · 6W
Function
How it works in the path
At 6 watts nominal draw and a shallow 200 mm depth, the EM 300 G4 plays nicely in tight rigs. The dual BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. antenna inputs support diversityA receiver with two antennas and two radio sections that continuously picks the stronger one — the difference between a dropout and a show. reception, but the real load-in story is antenna management: four receivers sprouting eight whipsThe stock quarter-wave stick antenna that screws straight onto a receiver — fine for a channel or two in a small room. from the rack face is a cabling disaster waiting to happen. Plan a BNC antenna distributionOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent. system — an RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. Venue Distro4 or Sennheiser ASA 1 — from the start, and route clean coax runs to a pair of paddlesA directional antenna (paddle, LPDA, helical) aimed at the stage — focuses coverage where the performers are and rejects RF from elsewhere. mounted where they actually have line of sight to the stage. Both XLRThe standard 3-pin locking connector for mics and balanced line signals — pin 1 is the shield, pins 2 and 3 carry the balanced pair. and quarter-inch outputs are present, so you can feed a console or a direct pedalboard input without an adapter in a pinch.
Best fit
Where it earns its place in the rack
This receiver is well-suited to mid-sized touring rigs, house-of-worship systems, and corporate event packages where you want reliable G4 performance without stepping up to the G4 500-series rack-mount receivers. If you only need one or two channels occasionally, it gets the job done cleanly. Where it stops making sense is large-scale shows with twelve or more channels — at that count you're managing a lot of individual half-rackThe standard slice of rack height: 1U = 1.75″. A 3U box takes three slices; half-rack gear pairs two units side by side in one. units and separate power supplies, and a dedicated multi-channel rack system becomes easier to maintain under pressure. Budget the full antenna distributionOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent. system into your planning from day one; treating it as an optional add-on leads to RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. headaches at showtime.
Sennheiser EM 300 G4 Wireless Mic Receiver — front and rear panels togetherPhoto: Sennheiser
In the rack
Details worth deciding before load-in.
Always pair half-rackThe standard slice of rack height: 1U = 1.75″. A 3U box takes three slices; half-rack gear pairs two units side by side in one. trays in advance — don't assume borrowed trays will match your rack's rail spacing. Sennheiser's GA 3 rack tray accepts two G4 half-rack units and keeps them secured as a single 1U assembly.
Run BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show.antenna distributionOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent. rather than individual whipsThe stock quarter-wave stick antenna that screws straight onto a receiver — fine for a channel or two in a small room. per receiver. Two paddleA directional antenna (paddle, LPDA, helical) aimed at the stage — focuses coverage where the performers are and rejects RF from elsewhere. antennas fed through a Distro4 or ASA 1 will outperform eight whips cramped at the rack face, especially with multiple units sharing the same frequency band.
Label each receiver's output cable and its corresponding transmitter before load-in — four identical silver boxes in a dark rack look the same at 7 AM. Colored cable labels or rear-panel tags save real time during sound check.
Power draw is low enough that a single filtered outlet strip handles several units, but give each receiver its own DC power supply run rather than daisy-chaining — shared power paths are a common source of noise introduced late in a build.
02 · Know the whole path before you buy.
Signal path
Learn the route as a block diagram: source, product function, transport, and destination. Select any block to see what enters, what changes, and what leaves.
Interactive block diagramAuto-looping · hover, focus, or tap to hold a stage
Port-type signalProduct functionSystem boundary
Follow one signal from source to destination
Each block answers the same three questions: what arrives, what changes here, and what leaves.
01 · Source · selected
bnc + dc barrel
RJ45
XLR male + ¼-inch TS
01 · Source
3 documented inputs
bnc + dc barrel
Arrives as
3 documented inputs
Connector
bnc + dc barrel
Signal
antenna
03 · What this product asks of the rest of the system.
Compatibility
Treat connector names as the start of the check—not the answer. These are the boundaries that determine a complete working path.
Best fit · Wireless Mic
Use it when 1U · half-rack and 202 mm of depth fit the case.
Plan the companion path
Complete the path with upstream and downstream gear that matches connector, direction, signal type, protocol, and wiring standard.
Connector boundary
Documented connectors: XLR male, ¼-inch TS, bnc, RJ45. Match connector, direction, and signal type—not shape alone.
04 · Every connector, grouped by job.
I/O ports
Switch the product view and the documented port inventory updates with it—hardware and data stay side by side.
Every connector, grouped by job.
Switch panels to keep the hardware view and the documented port list in sync.
Front panelRear panel
All documented ports for Sennheiser EM 300 G4 Wireless Mic Receiver
Port
Panel
Connector
Direction
Signal
Channels
AF OUT BAL
rear
XLR male
output
analog audio
—
AF OUT UNBAL
rear
¼-inch TS
output
analog audio
—
ANT I
rear
bnc
input
antenna
—
ANT II
rear
bnc
input
antenna
—
ETHERNET
rear
RJ45
bidirectional
data
—
DC IN
rear
dc barrel
input
power
—
HEADPHONES
front
¼-inch TRS
output
analog audio
—
Showing 7 of 7 documented physical ports.
05 · Compare the decision, not just the price.
Alternatives
The rows are organized around fit, power, I/O, and system role so a cheaper unit cannot hide a more expensive workflow.
EM 300 G4The Sennheiser EM 300 G4 is the half-rack bodypack/handheld receiver in the Evolution Wireless G4 line — a single-channel receiver typically paired with an SKM 500 G4 handheld or SK 500 G4 bodypack for vocals and wireless instruments. One EM 300 G4 handles one vocalist or musician; chain several in a rack using BNC antenna distribution (RF Venue Distro4, Sennheiser ASA 1) to avoid forest-of-whips antennas sprouting from the rack front.View gear →
EW-D 835-SThe Sennheiser EW-D 835-S brings digital wireless clarity to the handheld mic world at an accessible price, with ultra-low 1.9ms latency that is essentially imperceptible during live performance. The digital transmission delivers clean, artifact-free audio that sounds notably better than analog wireless at this price point. It is an excellent upgrade path for users moving from older analog wireless systems to modern digital platforms.View gear →
EW-D EMThe EW-D EM is Sennheiser's digital wireless rack receiver, paired with EW-D handheld or bodypack transmitters. The all-digital signal path delivers low-latency, low-noise wireless without the companding artifacts of analog systems. A solid choice for musicians moving up from the analog G4 line.View gear →
XSW 1-835The Sennheiser XSW 1-835 brings Sennheiser vocal wireless under $350: a half-rack receiver with an e835-capsule handheld, automatic frequency management, and the build quality that separates it from no-name budget RF. It is the demand-data gap fill — users searched the XSW line by name before this add. The honest first step of the Sennheiser wireless ladder.View gear →
06 · Resolve the questions that can change the purchase or build plan.
Planning questions
Short, source-backed answers surface rack fit, power, cabling, and connection details before they become surprises.
How will the Sennheiser EM 300 G4 Wireless Mic Receiver affect rack fit and case depth?
It occupies 1U · half-rack. Its documented depth is 202 mm.
How much power does the Sennheiser EM 300 G4 Wireless Mic Receiver draw?
Typical draw is 6W and documented maximum draw is 3.6W.
What connections does the Sennheiser EM 300 G4 Wireless Mic Receiver have?
7 documented physical ports, including AF OUT BAL, AF OUT UNBAL, ANT I, ANT II, ETHERNET, DC IN.
Is the Sennheiser EM 300 G4 Wireless Mic Receiver discontinued?
B&H eXplora article from June 2024 confirms G4 series EOL; EW-DP is announced replacement system
07 · See this unit inside a real rack plan.
Builder preview
Placement is only the start. Builder checks space · depth · weight, power headroom, dependencies, and compatible signal paths around this exact catalog item.Open in Builder
