Radial Engineering Relay Xo User Manual Download Page 1

www.radialeng.com

True to the Music

Radial Engineering Ltd.

®

®

True to the Music

USER GUIDE

Radial Engineering Ltd.

Relay Xo

  

Relay Xo

  

FEATURES

1. JR1 REMOTE: 

Locking XLR 

a n d   ¼ ”   c o m b o   j a c k   u s e d   t o 
connect a remote switch. Use with 
footswitches, MIDI contact closures 
or the Radial JR1. 

2. REMOTE LINK:

 Used to link 

the switching of additional Relay 
Xo units. Allows stereo and multi-
channel switching systems. 

3. MIC/LINE INPUT:

 Balanced XLR 

input. The Relay Xo signal path is 
100% passive. Audio signals will 
pass through unchanged without 
added noise or distortion.

4. OUTPUT-B:

 Alternate balanced 

XLR output. This output is active 
when the select switch is pressed 
inward or when a remote switch is 
closed. The B LED illuminates when 
the output is active.

5. OUTPUT-A:

 Main balanced XLR 

output. This output is active when 
the switch is in the outward position 
or when a remote switch is open. 
The A LED illuminates when the 
output is active.

6. CABLE CLAMP:

 Prevents 

accidental power disconnection by 
locking down the AC adapter cable.  

7. POWER JACK:

 Connection for 

the included 15 volt (400mA) AC 
power adapter

8. FULL-BOTTOM NO-SLIP PAD:

 

This provides electrical isolation 
and plenty of ‘stay-put’ friction to 
keep the Relay Xo in one place.  

9. OUTPUT SELECT:

 This switch 

toggles the Relay Xo’s outputs. 
Two LED indicators display which 
output is active. 

10.

 

GROUND LIFT:

 Disconnects 

pin-1 (ground) on the input XLR 
jack to help reduce hum and buzz 
caused by ground loops.

6

7

8

9

1

5

2

3

4

RADIAL ENGINEERING 3 YEAR 

TRANSFERABLE LIMITED WARRANTY

RADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in material and 
workmanship and will remedy any such defects free of charge according to the terms of this warranty. 
Radial will repair or replace (at its option) any defective component(s) of this product (excluding fi nish and 
wear and tear on components under normal use) for a period of three (3) years from the original date of 
purchase. In the event that a particular product is no longer available, Radial reserves the right to replace 
the product with a similar product of equal or greater value. In the unlikely event that a defect is uncovered, 
please call 604-942-1001 or email [email protected] to obtain an RA number (Return Authorization 
number) before the 3 year warranty period expires. The product must be returned prepaid in the original 
shipping container (or equivalent) to Radial or to an authorized Radial repair center and you must assume 
the risk of loss or damage. A copy of the original invoice showing date of purchase and the dealer name 
must accompany any request for work to be performed under this limited and transferable warranty. This 
warranty shall not apply if the product has been damaged due to abuse, misuse, misapplication, accident 
or as a result of service or modifi cation by any other than an authorized Radial repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF 
AND DESCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING 
BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR 
A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD 
DESCRIBED ABOVE OF THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR 
ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE 
OF THIS PRODUCT.  THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO 
HAVE OTHER RIGHTS, WHICH MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE 
PRODUCT WAS PURCHASED.

Relay Xo

 User Guide - Part# R870 1275 00 • © Copyright 2014 all rights reserved

Specifi cations and appearance are subject to change without notice.

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC  V3C 5M5
tel:  604-942-1001 • fax:  604-942-1010 
[email protected] • www.radialeng.com

Audio circuit type: ............................................... Passive balanced A/B switcher

Switch: ................................................................ Electronically controlled relay

XLR input and outputs: ....................................... AES standard; pin-1 ground, 

pin-2 (+), pin-3 (-)

Ground lift: .......................................................... Lifts pin-1 on the XLR input

Power: ................................................................ 15V/400mA, 120V/240 power 

adapter included

Relay Xo specifi cations 

Wiring diagram for custom JR1 REMOTE switch

10

REMOTE  AB  SWITCHER

1 2

3

Open Switch

Open Switch

Sleeve

Cable Shield

Cable Shield

Tip

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