Sennheiser ASA 1/NT Antenna Splitter
Sennheiser·Model ASA 1/NT·sennheiser-asa1nt
Photos
Manufacturer product photography — the drawn faceplate above stays true to panel layout; these show the hardware itself.
About the Sennheiser ASA 1/NT
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 RFRadio Frequency — the wireless part of wireless. RF planning is why big rigs scan, coordinate, and combine antennas instead of hoping. status and antenna performance from FOHFront Of House — the main mix the audience hears, and the console position out in the room where it gets mixed. 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.
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.
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.
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
- 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.
8-way active antenna splitter for Sennheiser wireless. Ethernet-enabled for remote monitoring.
I/O Ports (20)
| Port | Connector | Direction | Signal | Channels |
|---|---|---|---|---|
| Antenna In A | BNC | input | antenna | — |
| Antenna In B | BNC | input | antenna | — |
| Out A1 | BNC | output | antenna | — |
| Out A2 | BNC | output | antenna | — |
| Out A3 | BNC | output | antenna | — |
| Out A4 | BNC | output | antenna | — |
| Out A5 | BNC | output | antenna | — |
| Out A6 | BNC | output | antenna | — |
| Out A7 | BNC | output | antenna | — |
| Out A8 | BNC | output | antenna | — |
| Out B1 | BNC | output | antenna | — |
| Out B2 | BNC | output | antenna | — |
| Out B3 | BNC | output | antenna | — |
| Out B4 | BNC | output | antenna | — |
| Out B5 | BNC | output | antenna | — |
| Out B6 | BNC | output | antenna | — |
| Out B7 | BNC | output | antenna | — |
| Out B8 | BNC | output | antenna | — |
| Ethernet | RJ45 | bidirectional | data | — |
- Power (IEC) (IEC C14)
Deciding between two?
Rack space, watts, weight and every connector, side by side.
Related gear
Related articles
Guides from our library that cover planning around antenna distro gear.
What an IEM rig actually is, the components that go into one, and how to plan your first one without overspending or blowing a circuit.
Why your wireless mics and IEMs need a frequency plan, what intermodulation means in practice, and how to coordinate channels for a clean show.
When you need a combiner vs a distro, active vs passive, cable choice and length math, and how to scale a 4-pack rig into an 8 or 12-pack without intermod nightmares.
How to build an IEM rack: choosing case size and depth, ordering gear by weight and heat, power sequencing rules, wiring practice, and a pre-show checklist.