The ASA 1/NT is Sennheiser's higher-capacity antenna splitter with eight outputs per side and built-in Ethernet for remote monitoring via Sennheiser's Wireless Systems Manager software. It is purpose-built for larger Sennheiser wireless deployments where you need to monitor RF status and antenna performance from FOH or a network dashboard. The Ethernet connectivity is a significant step up from the ASA 214 for production teams that need visibility into their RF environment.
~$1,399Use 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
Antenna Distro decisions, organized around the whole rig.
The ASA 1/NT is the antenna distributionOne pair of antennas feeding many receivers through an amplified splitter — replaces the forest of whips and keeps RF levels consistent. backbone for serious Sennheiser wireless deployments. It takes two antenna inputs — one per polarization if you're running a proper diversityA receiver with two antennas and two radio sections that continuously picks the stronger one — the difference between a dropout and a show. setup — and fans each of them out to eight active outputs, giving you sixteen total BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. feeds from a single rack unitThe 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.. Those outputs go directly to your receivers, so a single pair of well-placed antennas can serve an entire rack of EM 300, 500, or 6000-series receivers without each unit fighting for signal on its own whipThe stock quarter-wave stick antenna that screws straight onto a receiver — fine for a channel or two in a small room.. This is the piece of infrastructure that lets you centralize your antenna placement rather than scattering dipoles across a stage.
Documented outputs
1616 destination connections
Documented inputs
3Based on documented inputs
Rack space
1U · half-rackBuilder checks available rail space
Sennheiser product panel1U · half-rack · 8W
Function
How it works in the path
Eight watts nominal draw for a 1UThe 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. active splitter is straightforward — plan for a 10W ceiling on your power strip and move on. The 220mm depth is shallow enough to live comfortably in most tour racks. What matters more in practice is the Ethernet port: with Sennheiser's Wireless Systems Manager software running, you can pull RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. status and antenna signal strength from FOHFront Of House — the main mix the audience hears, and the console position out in the room where it gets mixed. or a backstage network position without walking the stage. On a festival where your IEMIn-Ear Monitor — earpieces that replace floor wedges, feeding each player their own mix. The reason this whole rack exists. rack is locked behind a drum riser and you're troubleshooting a dropoutA brief audio gap when the radio link fails — the thing diversity, distros, and coordination all exist to prevent. from the mix position, that visibility is not a luxury. The active design also means the splitter is compensating for the split loss rather than just passing a degraded signal passively down the chain.
Best fit
Where it earns its place in the rack
This unit belongs in a rack running five or more Sennheiser receivers where centralized antenna placement is either necessary or strongly preferred, and where someone on the team will actually use WSMSennheiser’s Wireless Systems Manager — laptop software for coordinating and monitoring a rack of Sennheiser RF. for monitoring. If you're running three receivers and your antennas live two feet away, the cost and complexity don't justify it — a smaller passive or two-output active splitter is more appropriate. Likewise, if your wireless inventory is mixed-brand, the ASA 1/NT's value proposition shrinks considerably since WSM integration is Sennheiser-specific. But for a dedicated Sennheiser IEMIn-Ear Monitor — earpieces that replace floor wedges, feeding each player their own mix. The reason this whole rack exists. and microphone rig on a touring or theater production, this is a clean, purpose-fit solution.
In the rack
Details worth deciding before load-in.
Run your two antenna inputs as vertical and horizontal polarizations from a single remote antenna position — the ASA 1/NT's dual-path architecture is designed exactly for this, and it's the most common reason to choose it over a single-input splitter.
Label your BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. outputs at the splitter before the tour starts: A1–A8 and B1–B8 can become a wiring puzzle fast in a packed rack under show pressure.
Plug the Ethernet port into your show network and configure WSMSennheiser’s Wireless Systems Manager — laptop software for coordinating and monitoring a rack of Sennheiser RF. before doors on day one — having baseline RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. readings before the room fills means you have a reference point when something looks off at soundcheck.
Keep the ASA 1/NT's outputs as short as possible to the receiver BNCThe twist-lock coax connector used for word clock and antenna runs — it locks, so it can’t be pulled out mid-show. inputs; every foot of coax between the splitter and the receiver is signal you don't get back.
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 + IEC C14
RJ45
bnc
01 · Source
3 documented inputs
bnc + IEC C14
Arrives as
3 documented inputs
Connector
bnc + IEC C14
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 · Antenna Distro
Use it when 1U · half-rack and 220 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: bnc, RJ45, IEC C14. 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 ASA 1/NT Antenna Splitter
Port
Panel
Connector
Direction
Signal
Channels
Antenna In A
rear
bnc
input
antenna
—
Antenna In B
rear
bnc
input
antenna
—
Out A1
rear
bnc
output
antenna
—
Out A2
rear
bnc
output
antenna
—
Out A3
rear
bnc
output
antenna
—
Out A4
rear
bnc
output
antenna
—
Out A5
rear
bnc
output
antenna
—
Out A6
rear
bnc
output
antenna
—
Out A7
rear
bnc
output
antenna
—
Out A8
rear
bnc
output
antenna
—
Out B1
rear
bnc
output
antenna
—
Out B2
rear
bnc
output
antenna
—
Out B3
rear
bnc
output
antenna
—
Out B4
rear
bnc
output
antenna
—
Out B5
rear
bnc
output
antenna
—
Out B6
rear
bnc
output
antenna
—
Out B7
rear
bnc
output
antenna
—
Out B8
rear
bnc
output
antenna
—
Ethernet
rear
RJ45
bidirectional
data
—
Power (IEC)
rear
IEC C14
input
power
—
Showing 20 of 20 documented physical ports. Scroll to review the remaining rows.
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.
ASA 1/NTThe ASA 1/NT is Sennheiser's higher-capacity antenna splitter with eight outputs per side and built-in Ethernet for remote monitoring via Sennheiser's Wireless Systems Manager software. It is purpose-built for larger Sennheiser wireless deployments where you need to monitor RF status and antenna performance from FOH or a network dashboard. The Ethernet connectivity is a significant step up from the ASA 214 for production teams that need visibility into their RF environment.View gear →
AC 41-USThe Sennheiser AC 41-US combines four IEM transmitter outputs onto one antenna, the standard move once an evolution wireless G4 monitor rack grows past two channels. Active gain stages make up the combining loss so the radiated power stays useful, and units cascade for larger systems. Half-rack chassis pairs with Sennheiser rack hardware.View gear →
ASA 214The ASA 214 is Sennheiser's entry-level antenna distribution solution, designed specifically for their Evolution Wireless and 2000 series receivers. It provides four outputs per antenna with active gain compensation, making it the right choice when you are running multiple Sennheiser wireless channels from shared antennas. If you are in the Sennheiser ecosystem, this is simpler and more cost-effective than using a third-party distro.View gear →
EW-D ASAThe Sennheiser EW-D ASA is the current-generation antenna splitter for Evolution Wireless Digital, feeding four EW-D or EW-DX receivers from one antenna pair and powering them over the included DC leads. It replaces the legacy ASA 1 and ASA 214 in new systems, and two units cascade for eight-channel racks. Sold as a kit with power supply and eight BNC interconnects.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 ASA 1/NT Antenna Splitter affect rack fit and case depth?
It occupies 1U · half-rack. Its documented depth is 220 mm.
How much power does the Sennheiser ASA 1/NT Antenna Splitter draw?
Typical draw is 8W and documented maximum draw is 10W.
What connections does the Sennheiser ASA 1/NT Antenna Splitter have?
20 documented physical ports, including Antenna In A, Antenna In B, Out A1, Out A2, Out A3, Out A4.
Is the Sennheiser ASA 1/NT Antenna Splitter discontinued?
Superseded by EW-D ASA; ASA 1 discontinued, gone from major retail (2026-07-21). Kept for owners.
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
