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The Radial Engineering Relay Xo Balanced Remote AB Switcher is a 1 input, 2 outputs balanced audio switcher designed to route the output of a microphone to two different audio inputs. This enables a vocalist to switch his mic between the main PA system and the monitors for discreet communication. This is of particular importance for artists that employ in-ear monitors. You can also use the Relay Xo to send the output of a microphone to two channels on the PA. The first channel could be set dry to speak to the audience between sets, while the second channel could be set wet with reverb and echo to enhance the voice. This enables the vocalist to control effects and deliver a more professional performance.
The Relay Xo features a balanced XLR input and two balanced XLR outputs. The audio signal path is a passive wire. There are no transformers or electronic buffers inside that could introduce distortion or color the tone. The Relay Xo employs military-grade gold-contact sealed relays to do the switching. This makes it suitable for both mic and line level signals. Switching may be done using the side-access pushbutton switch or by remote control via the XLR and 1/4" input jacks using either the Radial JR1-L latching or JR1-M momentary footswitch (not included). A remote link enables multiple units to be used in tandem.
Switches vocal microphone from PA to intercom
Allows artist to speak with musicians and techs
Remote control using footswitch, MIDI contact closures, or the Radial JR1 (not included)
Routes any balanced signal to two destinations
Locking XLR and 1/4" combo jack used to connect a remote switch
Features remote link capabilities to link the switching of additional Relay Xo units
Supports stereo and multichannel switching systems
Balanced XLR input
Signal path is a passive copper wire that ensures audio signals pass-through without any change or added noise or distortion
Output select switch toggles the Relay Xo's outputs
Two LED indicators display which output is active
Ground lift disconnects pin-1 (ground) on the input XLR jack to help reduce hum and buzz caused by ground loops
Features heavy duty glass-filled XLRs with nickel-silver contacts
Military grade relays are used to switch the audio signal and provide a straight wire signal path
Discrete full size, hand inserted parts ensure the audio signal flows without impediment from input to output without distortion or artifact
Double sided military spec for greater durability and full ground plane to reduce radio frequency interference
Book end design creates a protective zone around the jacks and switches
Switches feature metal outer casing are rated at over 20000 cycles for durability
Features a cable clamp to prevents accidental power disconnection by locking down the AC adapter cable
Full-bottom no-slip pad provides electrical isolation and holds the Relay Xo in one place
I-beam enclosure eliminates cold solder joints from developing
Powder coat finish
In the Box
Radial Engineering Relay Xo Balanced Remote AB switcher
Limited 3-Year Warranty
Table of Contents
Audio Circuit Type
Remotely controlled mechanical relay
10 Hz to 100 kHz
Total Harmonic Distortion
Common Mode Rejection
<1° at all frequencies
A/B switch, ground lift
XLR Output B only
XLR-F input, 2 x XLR-M outputs
AES standard pin-1 ground, pin-2 (+), pin-3 (-)
Combo (XLR-F and 1/4"), 1/4" loop-through
With 1/4" TRS jack, short tip and ground to switch With XLR, short pin-1 ground and pin-2 Hot to switch
14 gauge steel with internal I-beam
15 VDC, 30 mA, center-pin (+)
For use in dry locations only between 41 to 104°F (5 to 40°C)