User Guide

Installation Precautions
Voltage Selection and Power Connection
Safety Warning
Attention! Cables
Electric Fields
Mains power to the XL42 is supplied by means of a standard fused IEC power socket. The XL42 is designed to
operate at nominal mains voltages of 115V and 230V AC at either 50 or 60 Hz, however, upon first use (and
whenever the mains supply is changed) the input voltage selector on the rear of the unit must be set to reflect the
local power supply. This information is also printed on the rear of the unit, below the mains inlet socket.
This device must be earthed and must use an approved mains fuse. Before connecting to the mains supply,
ensure the fuse fitted is the correct type and rating as indicated on the rear panel (adjacent to fuse holder) and
that the correct mains supply voltage is selected.
To completely disconnect this equipment from the AC mains, set the power switch to the off position. The power
switch shall remain readily operable.
Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as
vases, are placed on the equipment.
For safety reasons the earth lead for this unit should never be disconnected. In the event of ground loop
problems, under no circumstances must the mains earth be removed. Instead, disconnect the signal screen at
one end of the connecting cables. Please note that this can only be done when the unit is being used within a
balanced system.
To prevent shock or fire hazard, do not expose the unit to rain or moisture. To avoid electrical shock do not
remove covers. Refer servicing to qualified personnel only.
The inputs and outputs are balanced on conventionally wired XLRs (pin 1 screen, pin 2 hot and pin 3 cold). This
product should only be used with high quality, screened twisted pair audio cables, terminated with metal-bodied
3-pin XLR connectors. Any other cable type or configuration for the audio signals may result in degraded
performance due to electromagnetic interference.
The +48V phantom power can only be used with balanced cables.
Should this product be used in an electromagnetic field that is amplitude modulated by an audio frequency signal
(20Hz to 20kHz), the signal to noise ratio may be degraded. Degradation of up to 60dB at a frequency
corresponding to the modulation signal may be experienced under extreme conditions (3V/m, 90% modulation).
No permanent damage or degradation of performance will be caused by these conditions.
Note:
Do not install this unit in a location subjected to excessive heat, dust or mechanical vibration. Allow for adequate
ventilation around the unit, making sure the unit's vents are not obstructed. To avoid excessive heating of the
unit, avoid mounting the unit directly above power amplifiers or other devices that radiate significant amounts of
heat. Where necessary, use fan-cooled racks.
Before You StartBefore You Start
XL42 Operators Manual - Page 2