The Shure QLXD4 is the half-rack, single-channel sibling to the ULXD4 line — same Shure digital audio quality, but one channel at a time and no native Dante. Popular on house-of-worship and mid-scale theatre rigs where analog outputs to a stage-box channel are the norm. Pair two in a 1U shelf for a dual-receiver half-width fit.
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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 QLXD4 is Shure'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 digital wireless receiver — the leaner sibling to the ULXD4, occupying half a rack unit when paired in a 1U mounting shelf. It handles one transmitter at a time and puts that signal out as analog audio, either via 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. or quarter-inch. That makes it the right tool for rigs where you're feeding discrete channels into a stageboxThe I/O endpoint on stage: mics plug in there and one digital line (AES50, Dante) carries everything to the console. The snake, digitized. or a console's local inputs rather than routing audio over a network. House-of-worship setups, mid-size theatre rigs, and corporate tour packages with a handful of wireless channels are the natural home here.
Documented outputs
22 destination connections
Documented inputs
3Based on documented inputs
Rack space
1U · half-rackBuilder checks available rail space
Photo: Shure1U · half-rack · 10W
Function
How it works in the path
At 10 watts nominal draw with a 14-watt ceiling, two of these in a shelf barely register on your conditioner. The 295mm depth is worth noting — that's nearly a foot of chassis behind the rack earsThe flanges that bolt gear to the rack rails. Desktop boxes without them need a shelf, tray, or drawer to live in the case., so shallow touring cases won't work. Ethernet control means you can integrate it into Shure Wireless WorkbenchShure’s free RF-management software — scans the airwaves, calculates compatible frequencies, and monitors every receiver from a laptop. or WWB6 for frequency coordinationCalculating a set of wireless frequencies that won’t interfere with each other or local TV — the homework behind a clean RF night. and remote gainHow much the preamp amplifies the incoming signal. Too low and you’re hunting through hiss; too high and peaks clip., which matters when your wireless rack is behind a curtain or halfway across a stage. The analog-only outputs are the real operational constraint: every channel needs a discrete physical cable run back to the console. Plan your snakeA multicore cable bundling many channels into one stage-to-console run. A sub-snake collects one corner of the stage into a drop box. real estate accordingly.
Best fit
Where it earns its place in the rack
If you're running two to four wireless channels on a predictable, site-specific install or a stable touring package that doesn't need networked audio, the QLXD4 is a sensible, cost-effective choice. If you're scaling past four channels, need DanteThe most common audio-over-network standard: dozens of channels of uncompressed digital audio down one ordinary Ethernet cable between Dante boxes. or AES67The interop standard that lets different audio-network flavors (Dante, Ravenna, Livewire) exchange streams on the same network., or want to consolidate audio over a single Cat6Standard network cable grades. In an audio rig one cheap Cat5e run can replace a 48-channel copper snake; AES50 wants it shielded. run, step up to the ULXD4 or ULXD4D — the infrastructure savings will outweigh the price difference quickly. Similarly, if you need two channels in one 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. slot rather than two, look at the QLXD4D dual-channel variant before committing to a shelf build.
In the rack
Details worth deciding before load-in.
Use a Shure SHR-RACK1U 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. mounting shelf to pair two QLXD4s in a single rack unit — buy the shelf before load-in, not the night of.
Run antenna distributionOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent. (like a Shure UA844+SWB) upstream of your QLXD4s rather than relying on the onboard BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. inputs with passive whipsThe stock quarter-wave stick antenna that screws straight onto a receiver — fine for a channel or two in a small room.; the QLXD4's front-panel antennas are convenient for bench use, not for a racked show rig.
Connect the Ethernet port to a dedicated control switch on your rig's network and use Wireless WorkbenchShure’s free RF-management software — scans the airwaves, calculates compatible frequencies, and monitors every receiver from a laptop. to pre-coordinate frequencies before doors — remote gainHow much the preamp amplifies the incoming signal. Too low and you’re hunting through hiss; too high and peaks clip. trim from FOHFront Of House — the main mix the audience hears, and the console position out in the room where it gets mixed. during soundcheck saves you a stage walk every time a transmitter gets swapped.
Budget one stageboxThe I/O endpoint on stage: mics plug in there and one digital line (AES50, Dante) carries everything to the console. The snake, digitized. channel per receiver and label the 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. tail at the receiver end and the stagebox end before the cable gets buried — analog-only systems have no self-documentation, and six identical black cables look identical at 1 a.m. strike.
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 TRS
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 151 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 TRS, RJ45, bnc. 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 Shure QLXD4 Single Digital Wireless Receiver
Port
Panel
Connector
Direction
Signal
Channels
XLR OUT
rear
XLR male
output
analog audio
—
INST / AUX
rear
¼-inch TRS
output
analog audio
—
ETHERNET
rear
RJ45
bidirectional
data
—
ANTENNA A
rear
bnc
input
antenna
—
ANTENNA B
rear
bnc
input
antenna
—
POWER
rear
dc barrel
input
power
—
Showing 6 of 6 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.
QLXD4The Shure QLXD4 is the half-rack, single-channel sibling to the ULXD4 line — same Shure digital audio quality, but one channel at a time and no native Dante. Popular on house-of-worship and mid-scale theatre rigs where analog outputs to a stage-box channel are the norm. Pair two in a 1U shelf for a dual-receiver half-width fit.View gear →
SLXD4DThe Shure SLXD4D is a dual-channel digital wireless receiver that hits the sweet spot for theaters, regional touring, and houses of worship that want better-than-analog wireless without the touring-grade price of the ULXD line. 24-bit digital signal, AES-256 encryption, and rechargeable battery support out of the box.View gear →
SLXD4DThe Shure SLXD4D puts two SLX-D receivers in a single full-rack unit, providing an efficient and cost-effective way to deploy two wireless mic channels. The digital audio quality and RF performance punch above the price class, making it popular for corporate events, worship, and smaller touring acts. Shared antenna connections between the two channels simplify your antenna distribution setup.View gear →
SLXD4QThe Shure SLXD4Q packs four channels of SLX-D digital wireless into one rack space with internal antenna distribution, making it the value path to a four-mic rack without a distro. Guided frequency setup and rechargeable-friendly workflow carry the SLX-D pitch into density. The step below ULXD4Q at less than half the price.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 Shure QLXD4 Single Digital Wireless Receiver affect rack fit and case depth?
It occupies 1U · half-rack. Its documented depth is 151 mm.
How much power does the Shure QLXD4 Single Digital Wireless Receiver draw?
Typical draw is 10W and documented maximum draw is 4.8W.
What connections does the Shure QLXD4 Single Digital Wireless Receiver have?
6 documented physical ports, including XLR OUT, INST / AUX, ETHERNET, ANTENNA A, ANTENNA B, POWER.
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
