Overview - Radial Engineering SW4 Owner's Manual

True to the Music
SW4 OVERVIEW
Housed in a single space 19" rack enclosure, the Radial SW4 is a balanced analog audio switcher with four channels, each of which is equipped
with A and B XLR inputs and a dedicated XLR output. The four individual channels are essentially straight wire connections. There are no buffers
or amplifi ers in the signal path that could distort or introduce artifact.
The signal fl ow for each channel is diagramed below. After the A and B inputs, a set of trim controls allow you to fi ne tune input levels. Switching
the A/B inputs can be done via the front panel A/B selector or using the optional JR•2 remote. Each channel may be used independently or
channels may be linked together for stereo, three-channel or four-channel switching.
BALANCED
INPUT-A
BALANCED
INPUT-B
To eliminate hum and buzz caused by ground loops, each channel output is transformer isolated and equipped with a ground lift switch. These
are rated to handle signal levels in excess of +20dB from 20Hz to 20kHz and work equally well when switching the outputs from professional
mixing consoles as they do for wireless microphones and instrument level signals.
The output from each channel may be independently routed to the stereo mix bus. This equipped with balanced XLR and ¼" outputs. The mix
bus allows you to create a stereo mix from any of the four channels. Channels-1 and 3 are routed to the left output while 2 and 4 are routed to
the right output. A top-mounted mono-sum switch may be engaged to route all four channels to both outputs.
System monitoring is fully supported with signal present LEDs on each input and a PFL (Pre-Fader Listen) system. The PFL system enables the
audio engineer to listen to the primary input-A or secondary input-B sources before switching using headphones or a powered monitor speaker.
There are many applications where the SW4 can be used. Examples include: switching backup wireless microphones or guitars on a busy
stage; switching multi-channel backing tracks from a DAW workstation for a live musical performance; switching FOH mixing consoles at a music
festival. Several of these are detailed later in the manual.
Wireless Mics
Primary Backup
A B A
Mixing Console
Radial Engineering Ltd.
LINK
SWITCH
TRIM
LEVEL
A
A/B
SELECT
SWITCH
TRIM
LEVEL
JR•2 REMOTE
B
A/B SWITCH
DAW Workstation
Primary Backup
B A B A B
To next channel A/B switch
GROUND
LIFT
MUTE
ISOLATION
ON/OFF
TRANSFORMER
MIX
BUS
ON/OFF
FOH
Mixer-1
L C R F
A B A
Left Center
1
CHANNEL
OUTPUT
STEREO
OUTPUT
FOH
Mixer-2
L C R
B A B A B
Right Front Fills
SW4 Owner's Manual
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