01 · Connection
1 bidirectional connection
bnc
- Connection
- 1 bidirectional port
- Connector
- bnc
- Signal
- antenna
RF Antenna
Sennheiser A 2003-UHF Directional Antenna
The A 2003-UHF was the standard Sennheiser paddle for two decades — the flat directional antenna hanging over half the world's monitor rigs, pointed at the stage for receive or fed from a combiner for IEM transmit. Passive, wideband across the full legacy 450–960 MHz UHF span, and reciprocal, it did both jobs with the same hardware. Sennheiser has discontinued it in favor of the ADP UHF, but so many are in circulation that used racks and installed rigs will carry them for years yet.
Discontinued. Discontinued - sennheiser.com US: "This product is no longer available to be purchased"; US dealer stock exhausted (Markertek / Chuck Levin listings sold out). Kept in catalog EOL-flagged: plenty are in circulation on installed and used rigs.
- Documented outputs
- 00 destination connections
- Documented inputs
- 0Based on documented inputs
- Rack space
- Outside rackPlan a shelf, tray, or stage position
- Power draw
- 0WVerified passive · no AC required
- Catalog estimate
- ~$280Use 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 A 2003-UHFThe TV-band radio range (roughly 470–608 MHz in the US) where serious wireless mics and IEMs live — better behaved than crowded 2.4 GHz. was the standard Sennheiser paddleA directional antenna (paddle, LPDA, helical) aimed at the stage — focuses coverage where the performers are and rejects RF from elsewhere. for two decades — the flat directional antenna hanging over half the world's monitor rigs, pointed at the stage for receive or fed from a combinerThe transmit-side twin of a distro: merges several IEM transmitters into one antenna without letting them intermodulate. for IEMIn-Ear Monitor — earpieces that replace floor wedges, feeding each player their own mix. The reason this whole rack exists. transmit. Passive, wideband across the full legacy 450–960 MHz UHF span, and reciprocal, it did both jobs with the same hardware. Sennheiser has discontinued it in favor of the ADP UHF, but so many are in circulation that used racks and installed rigs will carry them for years yet.
- Documented outputs
- 00 destination connections
- 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 · Connection · 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 |
|---|---|---|---|---|---|
| Antenna (BNC) | rear | bnc | bidirectional | 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 | ⚡ 0W | ⚡ 0W | ⚡ 0W | ⚡ Bus |
| Weight | ⚖️ 0.8 lb | ⚖️ 0.3 lb | ⚖️ 0.7 lb | ⚖️ 1.4 lb |
| I/O | 🔌 1 | 🔌 1 | 🔌 1 | 🔌 1 |
| Estimate | 💵 ~$280 | 💵 ~$219 | 💵 ~$399 | 💵 ~$1,099 |
| 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 Sennheiser A 2003-UHF 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 Sennheiser A 2003-UHF Directional Antenna draw?
It is verified passive and requires no AC power.
What connections does the Sennheiser A 2003-UHF Directional Antenna have?
1 documented physical ports, including Antenna (BNC).
Is the Sennheiser A 2003-UHF Directional Antenna discontinued?
Discontinued - sennheiser.com US: "This product is no longer available to be purchased"; US dealer stock exhausted (Markertek / Chuck Levin listings sold out). Kept in catalog EOL-flagged: plenty are in circulation on installed and used rigs.
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 · ~$219RF Antenna
Sennheiser ADP UHF Directional Antenna
Outside rack · 1 ports · ~$399RF 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
Shure UA874 Active Directional Antenna
Outside rack · 1 ports · ~$450
RF Antenna