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Splitter

Radial SW8 Auto-Switcher

The Radial SW8 is a cornerstone of redundant playback rigs, automatically switching between two stereo sources so that if your primary playback computer drops out, the backup takes over seamlessly. It monitors pilot tones on each input and switches to the healthy source without any audible gap, which is exactly what you need for tracks-dependent live shows. The eight balanced outputs let you distribute the playback signal to multiple destinations like FOH, monitors, and IEM feeds.

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Photos

Manufacturer product photography — the drawn faceplate stays true to panel layout; these show the hardware itself.

Photo: Radial Engineering1 / 3
Documented outputs
88 destination connections
Documented inputs
5Based on documented inputs
Rack space
1UBuilder checks available rail space
Power draw
15W20W documented maximum
Catalog estimate
~$1,400Use 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

Splitter decisions, organized around the whole rig.

The Radial SW8 is the insurance policy that lives inside a redundant playback rack. Its job is simple and critical: monitor two stereo playback sources simultaneously, and the moment the primary source loses its pilot tone — computer crash, software freeze, cable fault — switch to the backup without a gap the audience or the band will ever hear. Eight balanced XLR outputs let you send that stereo playback signal to FOH, to the monitor desk, to IEM transmitters, and wherever else the show depends on it. If your production runs tracks, this is the box that keeps the track from stopping the show.

Documented outputs
88 destination connections
Documented inputs
5Based on documented inputs
Rack space
1UBuilder checks available rail space
Radial SW8 Auto-Switcher — additional view 1
Photo: Radial Engineering1U · 15W
Function

How it works in the path

In practice, the SW8 occupies one rack unit and draws a modest 15 watts, so it won't stress your power budget. The stereo inputs arrive on quarter-inch TRS — standard for playback rigs coming out of a laptop or dedicated playback machine — and the eight outputs are XLR male, which means you're running balanced lines straight to your snake or patch bay without any adapters in the signal path. At load-in, the critical task is dialing in pilot tones on both machines and confirming the switch actually triggers cleanly during soundcheck, not during the show. The shallow 190mm depth fits comfortably in a shallow tour rack alongside a laptop shelf.

Best fit

Where it earns its place in the rack

Pick the SW8 if your show runs backing tracks and the cost of a dropout is unacceptable — touring productions, theatrical runs, any situation where the band can't just vamp while someone reboots a computer. If you're running a simple playback rig with no redundancy requirement, or if your switcher needs digital inputs to interface with a Dante or MADI-based system, the SW8 won't fit that workflow — its inputs are analog only. At $1,400 it's a professional tool priced for professional stakes, and the math is easy: it costs far less than one cancelled show.

Radial SW8 Auto-Switcher — additional view 2
Radial SW8 Auto-Switcher — additional view 2Photo: Radial Engineering
In the rack

Details worth deciding before load-in.

  • Run both playback machines through the full signal chain during soundcheck and deliberately trigger the switch — mute the primary source — so you know the failover works before doors open.
  • Label the eight outputs on the rear panel with gaffer tape before the rig ships: FOH L, FOH R, MON L, MON R, IEM L, IEM R, and so on. In a dark stage wing at load-in, you'll thank yourself.
  • Keep both playback machines on the same power circuit as the SW8 if possible — a breaker trip that kills one machine but not the other is exactly the scenario the unit is built for, and it should switch cleanly.
  • Sync both playback computers to the same clock source or set them to the same sample rate and buffer; the SW8 handles the audio switching, but a sample-rate mismatch on the backup machine will still produce artifacts when it takes over.

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
01 · Source

5 documented inputs

¼-inch TRS + IEC C14

Arrives as
5 documented inputs
Connector
¼-inch TRS + IEC C14
Signal
analog audio

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 · Splitter

Use it when 1U and 190 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: ¼-inch TRS, XLR male, 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 panel
RadialSW8
Rear panel
RadialSW8
All documented ports for Radial SW8 Auto-Switcher
PortPanelConnectorDirectionSignalChannels
Input A Left (TRS)rear¼-inch TRS inputanalog audio—
Input A Right (TRS)rear¼-inch TRS inputanalog audio—
Input B Left (TRS)rear¼-inch TRS inputanalog audio—
Input B Right (TRS)rear¼-inch TRS inputanalog audio—
Output 1 (XLR)frontXLR male outputanalog audio—
Output 2 (XLR)frontXLR male outputanalog audio—
Output 3 (XLR)frontXLR male outputanalog audio—
Output 4 (XLR)frontXLR male outputanalog audio—
Output 5 (XLR)frontXLR male outputanalog audio—
Output 6 (XLR)frontXLR male outputanalog audio—
Output 7 (XLR)frontXLR male outputanalog audio—
Output 8 (XLR)frontXLR male outputanalog audio—
Power (IEC)rearIEC C14 inputpower—

Showing 13 of 13 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.

Compare
Radial SW8 Auto-Switcher
Radial JS3 Splitter
Fit📐 1U📐 1U📐 Outside rack
Power⚡ 15W⚡ 0W⚡ Unverified
Weight⚖️ 4.4 lb⚖️ 5.3 lb⚖️ 3.3 lb
I/O🔌 13🔌 24🔌 4
Estimate💵 ~$1,400💵 ~$639💵 ~$299
Deep diveCurrent selectionFull 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.

How will the Radial SW8 Auto-Switcher affect rack fit and case depth?

It occupies 1U. Its documented depth is 190 mm.

How much power does the Radial SW8 Auto-Switcher draw?

Typical draw is 15W and documented maximum draw is 20W.

What connections does the Radial SW8 Auto-Switcher have?

13 documented physical ports, including Input A Left (TRS), Input A Right (TRS), Input B Left (TRS), Input B Right (TRS), Output 1 (XLR), Output 2 (XLR).

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
SW8 Auto-Switcher positioned in a rack planA simplified plan shows the unit taking 1 rack units, with its documented connection path continuing to a planned destination.RadialSW8CONNECTED GEARnext signal destination1U · 190 mm deep

08 · Related gear, in the order you may need it.

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Radial JS3 Splitter

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Behringer Ultralink MS8000

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ART S8 Passive Splitter

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SEISMIC

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Seismic Audio SA-RMSS-8 Mic Splitter

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