01 · This unit
Shure UA874 Active Directional Antenna
Power arrives through a documented signal or data connection.
- Arrives through
- No documented input
- This stage
- Performs the documented product role
- Power
- Bus
RF Antenna
Shure UA874 Active Directional Antenna
The UA874 is the standard Shure paddle for remote-mounting receive antennas: a directional log-periodic array with a built-in amplifier whose four-position gain switch exists to make up long coax runs, not to "boost range". Its 70-degree beamwidth aims the pickup at the stage and rejects the audience-side RF junk, and the RF overload LED tells you when +12 dB was the wrong answer. It draws its bias power over the same BNC coax from a UA844+/UA845 distro, so the stage end stays a single cable.
Photos
Manufacturer product photography showing the hardware, controls, and physical form.
- Documented outputs
- 1One destination connection
- Documented inputs
- 0Based on documented inputs
- Rack space
- Outside rackPlan a shelf, tray, or stage position
- Power draw
- BusPowered through a documented signal or data connection
- Catalog estimate
- ~$450Use 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
RF Antenna decisions, organized around the whole rig.
The UA874 is the standard Shure paddleA directional antenna (paddle, LPDA, helical) aimed at the stage — focuses coverage where the performers are and rejects RF from elsewhere. for remote-mounting receive antennas: a directional log-periodic array with a built-in amplifier whose four-position gainHow much the preamp amplifies the incoming signal. Too low and you’re hunting through hiss; too high and peaks clip. switch exists to make up long coax runs, not to "boost range". Its 70-degree beamwidth aims the pickup at the stage and rejects the audience-side RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. junk, and the RF overload LED tells you when +12 dB was the wrong answer. It draws its bias power over the same BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. coax from a UA844+/UA845 distroOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent., so the stage end stays a single cable.
- Documented outputs
- 1One destination connection
- Documented inputs
- 0Based on documented inputs
- Rack space
- Outside rackPlan a shelf, tray, or stage position
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
01 · This unit · selectedEach block answers the same three questions: what arrives, what changes here, and what leaves.
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 · RF Antenna
Use it as rf antenna tracked outside rack rails; follow the manufacturer’s mounting and form-factor guidance.
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: 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.
| Port | Panel | Connector | Direction | Signal | Channels |
|---|---|---|---|---|---|
| RF Out + DC Bias In (BNC) | rear | bnc | output | antenna | — |
Showing 1 of 1 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.
| Compare |  |  | External unit |  |
|---|---|---|---|---|
| Fit | 📐 Outside rack | 📐 Outside rack | 📐 Outside rack | 📐 Outside rack |
| Power | ⚡ Bus | ⚡ 0W | ⚡ 0W | ⚡ 0W |
| Weight | ⚖️ 0.7 lb | ⚖️ 0.3 lb | ⚖️ 0.8 lb | ⚖️ 0.7 lb |
| I/O | 🔌 1 | 🔌 1 | 🔌 1 | 🔌 1 |
| Estimate | 💵 ~$450 | 💵 ~$219 | 💵 ~$280 | 💵 ~$399 |
| Deep dive | Current selection | Full comparison → | Full comparison → | Full comparison → |
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.
Where does the Shure UA874 Active Directional Antenna live in a complete rig?
The catalog assigns it no rack units. Builder tracks it as non-rack gear; follow the manufacturer’s mounting, case, and form-factor guidance.
How much power does the Shure UA874 Active Directional Antenna draw?
It is powered through its documented signal or data connection rather than a separate inlet.
What connections does the Shure UA874 Active Directional Antenna have?
1 documented physical ports, including RF Out + DC Bias In (BNC).
07 · See this gear inside a complete system plan.
Builder preview
Builder keeps non-rack gear in the same bill of materials, budget, dependency, and connection plan as the rack-mounted system around it.Open in Builder08 · Related gear, in the order you may need it.
Complete the system
RF Antenna
Sennheiser A 1031-U Omnidirectional Antenna
Outside rack · 1 ports · ~$219External unit
RF Antenna
Sennheiser A 2003-UHF Directional Antenna
Outside rack · 1 ports · ~$280RF Antenna
Sennheiser ADP UHF Directional Antenna
Outside rack · 1 ports · ~$399
RF Antenna
Sennheiser AD 3700 Active Directional Antenna
Outside rack · 1 ports · ~$1,099
RF Antenna
Shure UA860SWB Omnidirectional Antenna
Outside rack · 1 ports · ~$345
RF Antenna