Klark Teknik Square one Operator's Manual
splitter
manual
operator
OPERATOR MANUAL
Klark Teknik
Klark Teknik Building
Walter Nash Road
Kidderminster
Worcestershire
DY11 7HJ
England
Tel: +44 1562 741515
Fax: +44 1562 745371
Email: info@uk.telex.com
Website: www.ktsquareone.com
Square ONE Splitter - Operator Manual
DOC02-SQ1SPLITTER Issue B - January 2008
© Telex Communications (UK) Limited
In line with the company’s policy of continual improvement, specifications and function may be
subject to change without notice. This Operators Manual was correct at the time of writing. E&OE.
IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with arrowhead symbol
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“Dangerous Voltage” within the product's
enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
The exclamation point within an equilateral
triangle, is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product.
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with a dry cloth.
7 Do not block any of the ventilation openings. Install
in accordance with the manufacturer’s instructions.
8 Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9 Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding
type plug has two blades and a third grounding
prong. The wide blade or the third prong are
provided for your safety. If the provided plug does
not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10 Protect the power cord from being walked on or
pinched particularly at plugs, convenience
receptacles, and the point where they exit from the
apparatus.
11 Only use attachments/accessories specified by the
manufacturer.
12 Unplug this apparatus during lightning storms or
when unused for long periods of time.
13 Refer all servicing to qualified personnel. Servicing is
required when the apparatus has been damaged in
any way, such as power supply cord or plug is
damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate
normally, or has been dropped.
14 Use the mains plug to disconnect the apparatus from
the mains.
15 Warning: To reduce the risk of fire or electric
shock, do not expose this apparatus to rain or
moisture.
16 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.
17 The mains plug of the power supply cord shall
remain readily operable.
PRECAUTIONS
This equipment is supplied by a mains voltage that can cause electric shock injury!
The following special limitations must be observed in order to maintain safety and electromagnetic compatibility
performance.
Power
The internal power supply is a switch mode type that
automatically senses the incoming mains voltage and will
work where the nominal voltage is in the range 100V a.c.
to 240V a.c.
A single, fused IEC mains inlet is provided on the rear
panel. The correct lead for connection in the area to
which the unit was shipped is supplied with the unit. The
equipment should only be plugged into the mains outlet
using the supplied lead.
When removing the equipment’s electric plug from an
outlet, always hold the plug itself and not the cable, as
pulling out the plug by the cable can damage it, and never
insert or remove an electric plug with wet hands.
Grounding
In the event of ground loop problems, use the earth LIFT
switches provided on both sets of outputs (rear panel). If
you have ground loop problems relating to the inputs, use
a DI box, for example, Klark Teknik’s DN100, to provide
isolation.
Handling the equipment
Before moving the equipment, disconnect it from the
mains, and when lifting or moving it, always take its size
and weight into consideration.
Avoid inserting or dropping foreign objects, such as paper,
plastic, metal etc., into any gaps or openings on the
equipment, for example, vents. If this happens, turn off
the power immediately and unplug the power from the
a.c. outlet. Then have the equipment inspected by the
manufacturer's qualified service personnel.
Installation
Before installing and connecting up the equipment, check
that both the mains supply and the quality of earthing are
adequate for the equipment. Also check that the mains
power supply voltage rating corresponds with the local
mains power supply and that the mains fuse is of the
correct type and rating.
Unless advised otherwise, optional equipment must only
be installed by service personnel and in accordance with
the appropriate assembly and usage regulations.
Location
Ideally, a cool, well ventilated area is preferred, away
from power distribution equipment or other potential
sources of interference. Do not install this equipment in a
location subjected to excessive heat, dust or mechanical
vibration and keep the equipment out of direct sunlight.
Where necessary use fan cooled racks.
This unit is only intended for rack mounting.
Audio connections
To ensure the correct and reliable operation of your
Square ONE Splitter, only high quality balanced,
screened, twisted pair audio cable should be used. XLR
connector shells should be of metal construction so that
they provide a screen when connected to the unit and
should have Pin 1 connected to the cable screen.
PRECAUTIONS
Phantom power
Never apply phantom power to any unbalanced input
source. Before powering the unit, always check the +48V
status of any phantom powered equipment connected to
any of the 16 output XLRs on the rear panel. If +48V is
detected on any of these outputs the unit will apply +48V
to any devices connected to their corresponding inputs
(front or rear panel) as soon as the unit is powered up.
Radio frequency interference
Class B device
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause harmful interference to radio or television
reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
• Consult the dealer or an experienced radio TV
technician for help.
Electric fields
Caution:
In accordance with Part 15 of the FCC Rules &
Regulations, “… changes or modifications not
expressly approved by the party responsible for
compliance could void the user's authority to
operate the equipment.”
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).
Operation
Never remove, for example, covers, housings or any other
safety guards.
Never operate the equipment with the covers removed or
if safety guards are ineffective or their effectiveness has
been reduced.
EC-Declaration of Conformity
The undersigned, representing the following manufacturer
Manufacturer: Address:
Telex Communications (UK) Limited Klark Teknik Building, Walter Nash Road,
Kidderminster, Worcestershire DY11 7HJ
hereby declares that the following product
is in conformity with the regulations of the following marked EC-directive(s)
and bears the -mark accordingly
The conformity of the product with EC directives is provided by the compliance with the following standards:
Standards / date
Place, date: Kidderminster, UK
19th October 2007
Managing Director Business Line R+D Director Business Line
Printed name: John Oakley Printed name: Simon Harrison
Product Type Number Product Description Nominal Voltage(s) Current Freq.
Square ONE Splitter Microphone Splitter 115V AC
230V AC
400mA
200mA
50/60Hz
reference number title
2004/108/EC EMC Directive (EMC)
2006/95/EC Low-Voltage Directive (LVD)
reference number title
EN50081/1 Generic Standard Using EN55103 Limits and Methods
EN55103 Class B Conducted Emissions PAVI
EN55103 Class B Radiated Emissions PAVI
EN61000-4-4 Fast Transient Bursts at 2kV
EN61000-4-2 Static Discharge at 4kV
EN60204 Electrical Stress Test
EN60065 7
th
Edition
Electrical Safety
Klark Teknik
Contents
Square ONE Splitter i
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
About the Square ONE Splitter 1
Features 3
How to use the Square ONE Splitter 4
Using the main inputs 4
Using the outputs 4
Using the parallel inputs 5
Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Unpacking 6
Checking the mains fuse 6
Installation 6
Connecting the power cable 7
Connecting the audio cables 7
Channel I/O pin-outs 7
Connecting to unbalanced equipment 8
Powering the unit 8
Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
FIXED GAIN ISOLATED OUTPUT C / PARALLEL INPUT section 9
ACTIVE SPLITTER section 10
Phones, power and media split section 11
Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Channel I/O connections 12
Media split and ground lift switches 13
Mains supply 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Basic operation 14
Solo bus operation 14
Using headphones 14
Media split mode 15
Using the ground lift switches 15
Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Example 1 - FOH and MON split, and broadcast out 16
Example 2 - FOH and MON split, and recorder 17
Example 3 - Pre-mixed broadcast output 18
Audio signal path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Contents
ii Square ONE Splitter
Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Crib sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
More about splitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Introduction 23
Passive parallel splitter 24
Isolated splitter 25
Active splitter 26
Balanced audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Service information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Routine maintenance 28
Cleaning the unit 28
Checking/replacing the mains fuse 28
Introduction
Square ONE Splitter 1
Introduction
Thank you for purchasing a Klark Teknik Square ONE Splitter. Your Square ONE Splitter forms an integral
part of the Square ONE range, which was conceived by Klark Teknik to offer audio professionals a suite of
easily accessible, high-performance audio equipment, designed to provide no-compromise sonic quality with
a feature set that offers all essential facilities and functions. It represents the very best of British design and
engineering combined with contemporary, efficient manufacturing methods, and will give you many years of
reliable service.
All this is backed up, of course, by the standard Klark Teknik three-year warranty.
Please take the time to complete and return the registration card or fill in the Warranty Registration Form
online by visiting our website at www.ktsquareone.com and, to obtain the best results with a minimum of
effort, also read this operator manual.
Finally, enjoy your Klark Teknik Square ONE Splitter!
About the Square ONE Splitter
The Square ONE Splitter is a user-friendly, high-performance, eight-channel, active microphone (mic) splitter
designed for live sound reinforcement. Housed in a rugged and compact 2U rack enclosure, the Square ONE
Splitter offers a cost-effective and space-effective method of providing up to 24 outputs from 8 sources. In
addition, the Square ONE Splitter can also function as a 1 x 16 media splitter.
The Square ONE Splitter can distribute up to eight mic or line level signals to multiple locations, while
maintaining signal integrity and minimising noise interference. Its primary application is to split the audio
signals on-stage into individual feeds for front of house (FOH), monitoring (MON), multi-track recording, live
broadcasting or indeed any other requirement; see Figure 1, “Typical channel I/O connection options,” on
page 2. Although the Square ONE Splitter is a cost-effective unit, its signal integrity and audio performance
mean it can be used with any console, and the quality of its preamp and circuitry can enhance the audio
performance of lower cost consoles.
The Square ONE Splitter has eight channels, each consisting of two parallel inputs, two preamps, and a total
of three balanced outputs. Two of the outputs (identical) are electronically balanced, while the other is
transformer isolated. Both paralleled mic inputs feed two integral, superbly specified mic preamps, which are
based on the circuitry used in the DL431 Mic Splitter (part of the acclaimed Midas XL8 Live Performance
System). One preamp provides adjustable gain and drives the two electronically balanced outputs at
increased levels (up to line level), while the second provides a fixed gain copy of the input and drives the
transformer isolated output.
Channel controls consist of: solo, filter and phantom voltage pushbutton switches each with an adjacent LED
for on/off indication; a gain control knob; and a dedicated peak reading meter for displaying the output at all
times. The solo system allows any channel(s) to be monitored via the integral headphone amplifier. The gain
control knob is used for optimising the preamp gain. Standard +48V phantom powering is individually
switchable on each channel and has remote operation by virtue of its unique phantom voltage sensing
feature.
Additional controls include a headphone level control (just above a headphone jack), a global ground lift
switch per set of electronically balanced outputs and a media split switch. The media split switch activates
media split mode, in which the output of channel 8 is distributed to all 16 electronically balanced outputs.
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