Sonifex S0 v2 User manual

Manufacturers of audio & video
products for radio & TV broadcasters
S0 v2
Radio Broadcast Mixer
HANDBOOK

S0 v2 Handbook
This handbook is for use with the following product:
S0 v2 Radio Broadcast Mixer
AW10849 Stock Code: 30-367
Revision 1.04, October 2017
©Sonifex Ltd, 2017
All Rights Reserved
Sonifex Ltd, 61, Station Road, Irthlingborough,
Northants, NN9 5QE, England.
Tel: [phone]
Fax: [phone]
Email: [email protected]o.uk
Website: http://www.sonifex.co.uk
Information in this document is subject to change without notice and does not represent a
commitment on the part of the vendor. Sonifex Ltd shall not be liable for any loss or damage
whatsoever arising from the use of information or any error contained in this manual.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic
or mechanical, including photocopying, recording, information storage and retrieval systems, for any
purpose other than the purchaser’s personal use, without the express written permission of Sonifex
Ltd. Unless otherwise noted, all names of companies, products and persons contained herein are
part of a completely fictitious adaptation and are designed solely to document the use of Sonifex
product.
Made in the UK by
For the latest Sonifex handbook information please visit the
Sonifex website at www.sonifex.co.uk

Contents
Contents
Product Warranty - 2 Year Extended ii
Sonifex Warranty & Liability Terms & Conditions ii
1. Definitions ii
2. Warranty ii
Unpacking Your Product iii
Repairs & Returns iv
Conformity iv
Safety & Installation of Mains Operated Equipment v
Voltage Setting Checks v
Fuse Rating v
Power Cable & Connection v
WEEE Directive vi
Atmosphere/Environment vi
1. Introduction 1
Feature Summary & Overview of Use 2
Features 2
Input Channels 3
USB Audio for Playback & Recording 3
Output Channels 3
Monitoring & Headphone Limiter 3
Metering 4
Talkback 4
Channel Remotes 4
Configuration Settings 4
Installation Notes 4
Atmosphere 4
Electromagnetic Radiation 4
Dimensions and Cut-Out Size for Flush Mounting 5
2. User Guide 6
S0 v2 Input Channels 6
Channels 1-4 Mono Balanced Mic/Stereo Unbalanced Line
inputs 6
MIC INPUT 6
MIC TRIM 6
LINE INPUT 6
REMOTE OUTPUT 6
MIC / LINE Button 6
PGM Button 6
REC Button 7
TRIM Control 7
PAN/BAL Control 7
CUE PFL Button 7
FADER Control 8
START Button 8
Channels 5-8 Dual Stereo Unbalanced Line/
USB Audio Inputs 8
LINE INPUTS 8
REMOTE OUTPUT 8
INP1/INP2 Button 9
PGM Button 9
REC Button 9
TRIM Control 9
BAL Control 9
CUE PFL Button 10
FADER Control 10
START Button 10
Channel 9 Telephone Interface/Stereo Unbalanced
Auxiliary Inputs 10
AUX INPUT 10
R-BAL and C-BAL Controls 10
LINE (Telephone Interface) 10
HANDSET 11
CF/OUT 11
REMOTE OUTPUT 11
TEL/AUX Button 11
PGM Button 11
REC Button 12
TRIM Control 12
PAN/BAL Control 12
CUE/PFL & TB Button 12
FADER Control 13
LINE HOLD Button 13
Main Outputs 13
PROGRAM OUTPUT 13
RECORD OUTPUT 14
S0 v2 Monitor I/O & USB Channels 14
MONITOR OUTPUT 14
LIGHT CONTROL 14
PRESENTER Headphones 14
GUEST Headphones 14
H/PHONE LIMIT Control 14

Contents & Figures
USB AUDIO 14
USB SERIAL 14
EXT 1 INPUT 14
LED Meter Display 15
PGM, REC & EXT 1 Buttons 15
Monitor, Presenter & Guest Level Controls 15
Monitor AUTO CUE/PFL Button 15
Monitor MUTE Indicator 15
AUX INPUT CHANNEL 9 15
Presenter AUTO CUE/PFL Button 16
Presenter SPLIT CUE/PFL Button 16
PRESENTER Headphones 16
Guest AUTO CUE/PFL Button 16
Guest TALKBACK Button 16
GUEST Headphones 16
Using the Telephone Interface 17
Making A Telephone Call and Routing It Through The S0 v2 17
Receiving A Telephone Call and Routing It Through The S0 v2 17
Skype On CHANNEL 9 17
3. Configuration Options 18
Modifying the Configuration Options Using Setup Mode 18
Page 1 – Input Select Modes (LED on PPM Scale 1) 18
Page 2 – PGM and REC Button Modes (LED on PPM Scale 2) 19
Page 3 – PFL Modes (LED on PPM Scale 3) 19
Page 4 – Remote Output Modes (LED on PPM Scale 4) 20
Modifying the Configuration Options Using SCi Software 21
Download the latest SCi Software 21
Connecting the USB Serial Port 21
Using SCi For The First Time 21
4. USB Audio 26
USB Audio Output from the S0 v2 26
USB Audio Input to the S0 v2 26
5. Connectors and Cabling 27
XLR 3 Pin Connectors 27
RCA (Phono) Connectors 27
6.35mm (¼”) ‘A’ Gauge Stereo Jack Plugs 27
Technical Specification For S0 v2 28
7. Appendix 1: S0 v2 – USB Serial Command Set 30
8. S0 v2 Skype Modification 34
Overview 34
Tools Required 34
Procedure 34
To disable Skype mode: 39
Figures
Fig 1-1: S0 v2 Mixer - Top View. 1
Fig 1-2: S0 v2 Mixer - Cut-out Sizes. 5
Fig 2-1: Channel 1 Rear Panel Connectors. 6
Fig 2-2: Channel 1 MIC/LINE Button. 6
Fig 2-3: Mic/Line Channel Strip. 7
Fig 2-4: Channel 1 FADER Control & START Button. 8
Fig 2-5: Channel 5 Rear Panel Connectors. 8
Fig 2-6: Dual Stereo Channel Input & Bus Selections. 9
Fig 2-7: Dual Stereo Channel Strip. 9
Fig 2-8: Channel 9 Rear Panel Connectors. 10
Fig 2-9: Channel 9 TEL/AUX Button. 11
Fig 2-10: Connection Diagram For Channel 9 For PC VOIP
Application. 11
Fig 2-11: Channel 9 Strip. 12
Fig 2-12: CUE/ PFL, Fader & LINE/HOLD Button. 12
Fig 2-13: Mains Outputs. 13
Fig 2-14: MONITOR I/O & USB. 14
Fig 2-15: LED Meter Display. 15
Fig 2-16: PGM, REC and EXT 1 Buttons. 15
Fig 2-17: Monitor, Presenter and Guests Controls. 16
Fig 3-1: SCI Launcher Window. 21
Fig 3-2: SCI Channel Configuration Screen. 22
Fig 3-3: SCI Monitor Configuration Screen. 23
Fig 3-4: SCI Info & Updates Screen. 24
Fig 3-5: Reset Switch. 25
Fig 4-1: PC Device List. 26
Fig 5-1: XLR 3 Pin Connectors. 27
Fig 5-2: RCA (Phone) Connectors. 27
Fig 5-3: 6.35mm (¼ inch) ‘A’ Gauge Stereo Jack Plugs Used
For Headphones And Monitor Outputs. 27
Fig 5-4: 6.35mm (¼ inch) ‘A’ Gauge Stereo Jack Plugs Used
For Remote Outputs. 27
Fig 5-5: 6.35mm (¼ inch) ‘A’ Gauge Stereo Jack Plugs Used
For Light Control Output. 27

Warranty Registration
Sonifex Limited y 61 Station Road y Irthlingborough y Northamptonshire y NN9 5QE y United Kingdom
Tel: [phone] y Fax: [phone] y Email: [e-mail] y Internet: www.sonifex.co.uk
Register Online for an
Extended 2 Year Warranty
As standard, Sonifex products are
supplied with a 1 year back to base
warranty.
If you register the product online, you
can increase your product warranty
to 2 years and we can also keep
you informed of any product design
improvements or modifications.
To register your product, please go online to www.sonifex.co.uk/register
Product:
Serial No:

ii
Warranty
Product Warranty - 2 Year Extended
As standard, Sonifex products are supplied with a 1 year back to base
warranty. In order to register the date of purchase and so that we can keep
you informed of any product design improvements or modifications, it is
important to complete the warranty registration online. Additionally, if you
register the product on the Sonifex website, you can increase your product
warranty to 2 years. Go to the Sonifex website at: http://www.sonifex.
co.uk/technical/register/index.asp to apply for your 2 year warranty.
Note: For your own records the product serial number is recorded on the
CE certification page of this handbook.
Sonifex Warranty & Liability Terms & Conditions
1. Definitions
‘the Company’ means Sonifex Ltd and where relevant includes companies
within the same group of companies as Sonifex Limited.
‘the Goods’ means the goods or any part thereof supplied by the Company
and where relevant includes: work carried out by the Company on items
supplied by the Purchaser; services supplied by the Company; and software
supplied by the Company.
‘the Purchaser’ means the person or organisation who buys or has agreed
to buy the Goods.
‘the Price’ means the Price of the Goods and any other charges incurred by
the Company in the supply of the Goods.
‘the Warranty Term’ is the length of the product warranty which is usually
12 months from the date of despatch; except when the product has been
registered at the Sonifex website when the Warranty Term is 24 months
from the date of despatch.
‘the Contract’ means the quotation, these Conditions of Sale and any
other document incorporated in a contract between the Company and the
Purchaser.
This is the entire Contract between the parties relating to the subject
matter hereof and may not be changed or terminated except in writing in
accordance with the provisions of this Contract. A reference to the consent,
acknowledgement, authority or agreement of the Company means in
writing and only by a director of the Company.
2. Warranty
a. The Company agrees to repair or (at its discretion) replace Goods
which are found to be defective (fair wear and tear excepted) and
which are returned to the Company within the Warranty Term
provided that each of the following are satisfied:
i. notification of any defect is given to the Company immediately
upon its becoming apparent to the Purchaser;
ii. the Goods have only been operated under normal operating
conditions and have only been subject to normal use (and
in particular the Goods must have been correctly connected
and must not have been subject to high voltage or to ionising
radiation and must not have been used contrary to the
Company’s technical recommendations);
iii. the Goods are returned to the Company’s premises at the
Purchaser’s expense;
iv. any Goods or parts of Goods replaced shall become the
property of the Company;
v. no work whatsoever (other than normal and proper
maintenance) has been carried out to the Goods or any part of
the Goods without the Company’s prior written consent;

iii
Warranty
vi. the defect has not arisen from a design made, furnished or
specified by the Purchaser;
vii. the Goods have been assembled or incorporated into other
goods only in accordance with any instructions issued by the
Company;
viii. the defect has not arisen from a design modified by the
Purchaser;
ix. the defect has not arisen from an item manufactured by a person
other than the Company. In respect of any item manufactured
by a person other than the Company, the Purchaser shall only be
entitled to the benefit of any warranty or guarantee provided by
such manufacturer to the Company.
b. In respect of computer software supplied by the Company the
Company does not warrant that the use of the software will be
uninterrupted or error free.
c. The Company accepts liability:
(i) for death or personal injury to the extent that it results from the
negligence of the Company, its employees (whilst in the course
of their employment) or its agents (in the course of the agency);
(ii) for any breach by the Company of any statutory undertaking as
to title, quiet possession and freedom from encumbrance.
d. Subject to conditions (a) and (c) from the time of despatch of
the Goods from the Company’s premises the Purchaser shall be
responsible for any defect in the Goods or loss, damage, nuisance
or interference whatsoever consequential economic or otherwise or
wastage of material resulting from or caused by or to the Goods. In
particular the Company shall not be liable for any loss of profits or
other economic losses. The Company accordingly excludes all liability
for the same.
e. At the request and expense of the Purchaser the Company will test
the Goods to ascertain performance levels and provide a report of
the results of that test. The report will be accurate at the time of the
test, to the best of the belief and knowledge of the Company, and the
Company accepts no liability in respect of its accuracy beyond that
set out in Condition (a).
f. Subject to Condition (e) no representation, condition, warranty or
other term, express or implied (by statute or otherwise) is given by
the Company that the Goods are of any particular quality or standard
or will enable the Purchaser to attain any particular performance
or result, or will be suitable for any particular purpose or use
under specific conditions or will provide any particular capacity,
notwithstanding that the requirement for such performance, result or
capacity or that such particular purpose or conditions may have been
known (or ought to have been known) to the Company, its employees
or agents.
g. (i) To the extent that the Company is held legally liable to the
Purchaser for any single breach of contract, tort, representation
or other act or default, the Company’s liability for the same
shall not exceed the price of the Goods.
(ii) The restriction of liability in Condition (g)(i) shall not apply to
any liability accepted by the Seller in Condition (c).
h. Where the Goods are sold under a consumer transaction (as defined
by the Consumer Transactions (Restrictions on Statements) Order
1976) the statutory rights of the Purchaser are not affected by these
Conditions of Sale.
Unpacking Your Product
Each product is shipped in protective packaging and should be inspected
for damage before use. If there is any transit damage take pictures of the
product packaging and notify the carrier immediately with all the relevant

iv
CE Conformity
details of the shipment. Packing materials should be kept for inspection and
also for if the product needs to be returned.
The product is shipped with the following equipment so please check to
ensure that you have all of the items below. If anything is missing, please
contact the supplier of your equipment immediately.
Item Quantity
Product unit 1
IEC mains lead fitted with moulded mains plug 1
Handbook and warranty card 1
If you require a different power lead, please let us know when ordering the
product.
Repairs & Returns
Please contact Sonifex or your supplier if you have any problems with your
Sonifex product. Email [e-mail] for the repair/
upgrade/returns procedure, or for support & questions regarding the
product operation.
Conformity
The products in this manual comply with the essential requirements of the
relevant European health, safety and environmental protection legislation.
The technical justification file for this product is available at Sonifex Ltd.
The declaration of conformity can be found at:
http://www.sonifex.co.uk/declarations

v
Safety & Installation
Safety & Installation of Mains
Operated Equipment
There are no user serviceable parts inside the equipment. If you should ever
need to look inside the unit, always disconnect the mains supply before
removing the equipment covers. The cover is connected to earth by means of
the fixing screws. It is essential to maintain this earth/ground connection to
ensure a safe operating environment and provide electromagnetic shielding.
Voltage Setting Checks
Ensure that the machine operating voltage is correct for your mains power
supply by checking the box in which your product was supplied. The voltage
is shown on the box label. The available voltage settings are 115V, or 230V.
Please note that all products are either switchable between 115V and 230V,
or have a universal power supply.
Fuse Rating
The product is supplied with a single fuse in the live conducting path of the
mains power input. For reasons of safety it is important that the correct
rating and type of fuse is used. Incorrectly rated fuses could present a
possible fire hazard, under equipment fault conditions. The active fuse is
fitted on the outside rear panel of the unit.
Power Cable & Connection
An IEC power connector is supplied with the product which has a moulded
plug attached.
The mains plug or IEC power connector is used as the disconnect device.
The mains plug and IEC power connector shall remain readily operable to
disconnect the apparatus in case of a fault or emergency.
The mains lead is automatically configured for the country that the product is
being sent to, from one of:
Territory Voltage IEC Lead Type Image
UK & Middle East 230V UK 3 pin to IEC lead
Europe 230V European Schuko round 2 pin to
IEC lead
USA, Canada and
South America 115V 3 flat pin to IEC lead
Australia & New
Zealand 230V Australasian 3 flat pin to IEC lead
Connect the equipment in accordance with the connection details and
before applying power to the unit, check that the machine has the correct
operating voltage for your mains power supply.
This apparatus is of a class I construction. It must be connected to a mains
socket outlet with a protective earthing connection.
Important note: If there is an earth/ground terminal on the rear panel of
the product then it must be connected to Earth.

vi
Safety & Installation
WEEE Directive
The Waste Electrical and Electronic Equipment (WEEE)
Directive was agreed on 13 February 2003, along with the
related Directive 2002/95/EC on Restrictions of the use of
certain Hazardous Substances in electrical and electronic
equipment (RoHS). The Waste Electrical and Electronic Equipment Directive
(WEEE) aims to minimise the impacts of electrical and electronic equipment
on the environment during their life times and when they become waste.
All products manufactured by Sonifex Ltd have the WEEE directive label
placed on the case. Sonifex Ltd will be happy to give you information about
local organisations that can reprocess the product when it reaches its “end
of use”, or alternatively all products that have reached “end of use” can be
returned to Sonifex and will be reprocessed correctly free of charge.
Atmosphere/Environment
This apparatus should be installed in an area that is not subject to excessive
temperature variation (<0°C, >50°C), moisture, dust or vibration.
This apparatus shall not be exposed to dripping or splashing, and no objects
filled with water, such as vases shall be placed on the apparatus.

1
Introduction 1
1. Introduction
The S0 v2 is a high quality yet simple to
operate radio broadcast mixer ideally suited
to community radio stations, for educational
purposes and for internet radio. It is easy
to use and provides the ideal solution for
those who do not require the advanced
functionality of a more complex unit.
Easy to understand, the S0 v2 includes a
telephone hybrid for making and recording
telephone calls and a 3.5mm stereo jack
for plugging in an mp3 player. The addition
of a USB port allows for recording to a PC
and for playing a PC automation system
directly through the mixer. The headphone
outputs have a built in limiter to offer hearing
protection and the studio speakers mute
when a microphone fader is open, with
automatic mic live sign switching.
Using many of the same components found
on the S2 and S1 mixers, the S0 v2 offers
quality and reliability in a cost effective
package. It also allows presenters and DJs
to be up and running quickly with a fully
featured radio studio mixer.
Fig 1-1: S0 v2 Mixer - Top View.

2
1 Introduction
Feature Summary & Overview of Use
• Fixed format 9 channel mixer.
• Can be rack mounted or used as a flush mounted desktop mixer.
• Large backlit buttons allow you to see the status of the mixer at all
times.
• The analogue signal paths use low noise circuitry to provide superb
audio performance.
• The high reliability and build quality of the S0 v2 minimises the chance
of failure, avoiding lost air-time.
• ALPS long throw 100mm faders give a smooth, repeatable response.
• The use of VCAs controlled by the faders ensures tight stereo tracking
and eliminates mechanical and electronic noise.
• The S0 v2 has an internal power supply providing regulated, ripple-free
power to the mixer.
Features
• Clear, simple and intuitive layout.
• 4 microphone/line input channels.
• 4 dual line input channels.
• Built in telephone interface channel.
• Auxiliary input for miscellaneous sources such as MP3 players.
• Independent Program and Record bus outputs.
• Pre-Fade Listen available on all channels.
• VU and PPM metering on a large LED display.
• Build in headphone volume limiter.
• Remote outputs on each channel to control external equipment such as
CD players.
• Automatic muting of the monitor output when a microphone channel is
open.
• Switching output to control external microphone live light.
• USB Audio input selectable on all dual line input channels, which can be
automatically routed to Pre-Fade Listen.
• USB Audio output from the Record bus.
• User configurable options, accessible using the Sonifex SCi software or
directly by using the S0 v2 Setup Mode, allowing for flexible setup and
operation.
The Sonifex S0 v2 mixer is a compact, low cost, fixed format broadcast
mixing console designed for on-air radio use. It uses the same high quality
circuitry and components as the Sonifex S2 and S1 mixers to provide an
audio experience second to none. The S0 v2 can be fitted flush into a desk-
top or can be rack mounted directly using the front panel mounting holes.
The uncomplicated and intuitive front panel layout ensures that the unit
appeals to novices and broadcast professionals alike, whilst a range of user
configurable options allows for flexible operation.
The console consists of nine input channels:
• 4 x mono balanced XLR mic/stereo unbalanced RCA phono line inputs.
• 4 x dual stereo unbalanced RCA phono line inputs.

3
Introduction 1
• 1 x telephone balance unit (with line and handset ports)/stereo
unbalanced RCA phono auxiliary input with a parallel 3.5mm stereo jack
input on the front panel.
Providing in total 4 mic, 12 stereo line, 1 TBU & 1 stereo auxiliary inputs
which you can switch between.
Input Channels
Input source buttons at the top of each channel strip are used to select the
required mono or stereo source. The mixer has two main stereo buses,
PGM (Program) and REC (Record), so each channel also has PGM and REC
buttons to independently select which mixer bus the selected input is
routed to.
The XLR microphone inputs on channels 1 to 4 have individually selectable
+48V phantom power and a gain calibration potentiometer providing
up to 65dB of gain for the pre-amp. Input channel 1 also serves as the
microphone input for a dedicated talkback channel.
The stereo RCA phono line inputs on channels 1 to 8 have 10dB of gain at
the input to compensate for unbalanced consumer inputs.
Input channel 9 is a TBU and stereo auxiliary input channel. The TBU allows
direct connection to a telephone line and allows calls to be made and
received through the mixer using the handset connection. The auxiliary
channel can switch between 2 independent inputs, one on the rear panel
and one on the front panel.
Any channel which has the fader up is routed to the selected output, either
PGM or REC or both.
Gain for each channel is trimmed by the front panel TRIM control providing
±15dB of gain. A PAN/BAL(ance) control is available to facilitate stereo
imaging.
The use of VCAs controlled by the ALPS long throw 100mm faders gives
a smooth, repeatable response and ensures tight stereo tracking while
eliminating mechanical and electronic noise.
USB Audio for Playback & Recording
The S0 v2 has the option to send and receive audio over USB. This allows
the audio on the REC bus to be sent to a PC for recording or monitoring
purposes. Also, the S0 v2 can receive a USB audio stream from a PC and
route it to the auxiliary inputs on channel 8. Alternatively, this signal can be
routed to channels 5, 6 or 7 if required.
Output Channels
The S0 v2 has separate stereo PGM and REC bus outputs. The PGM bus is
output on balanced stereo XLRs and the REC bus is output on unbalanced
stereo RCA phono connectors. There are monitor outputs for presenter
headphones, guest headphones and loudspeakers.
Monitoring & Headphone Limiter
The monitor loudspeakers, presenter headphones and guest headphones
are on 6.35mm stereo jack sockets and the headphones can be plugged in
to the front and rear of the mixer. The monitor loudspeaker and headphone
levels are independently variable between 0 (cut off) and 10 (max).
With the concerns over listening levels being too high in headphones, the
addition of an adjustable limit level potentiometer on the rear panel of the
mixer is a great idea which limits the maximum level of the audio routed
to the presenter and guest headphone outputs. An illuminated MUTE LED
shows when a live microphone channel has muted the loudspeakers and
there is a MUTE contact output available to illuminate a ‘MIC LIVE’ light via
a 6.35mm stereo jack socket on the rear panel.

4
1 Introduction
A three way electronically interlocking illuminated switch bank selects the
source routed to the loudspeaker and headphone outputs from either PGM,
REC or from an additional unbalanced stereo RCA phono input EXT 1. This
external input can be used for monitoring an off air signal or studio output.
Green illuminated AUTO CUE/PFL (pre fade listen) buttons adjacent to each
level control allow the automatic monitoring of any channel that has been
selected to pre-fade, either to the monitors or headphones.
For the presenter headphones, SPLIT CUE/PFL can be selected which places
the selected source in mono in the left ear, and pre-fade in mono in the
right ear.
Metering
A pair of bright 21 segment LED meters can be configured to show either
VU or PPM metering. The meters follow the selection of the presenter
headphones including any pre-fade or split pre-fade function.
Talkback
A separate TALKBACK button is provided to allow the presenter to talk to
a guest on the guest headphones. The S0 v2 uses input channel 1 as the
talkback source.
Channel Remotes
The remote outputs for each channel are highly configurable providing a
comprehensive range of options to interface external equipment to the
mixer. Each channel input has its own START and STOP remote controls
which can be triggered when the channel is routed to the PGM or REC bus
and the fader is opened or closed. The remotes can be set-up to be either
pulsed or continuous latched outputs, and if in pulsed mode the START
button has the capability to produce repeated start pulses.
Configuration Settings
The S0 v2 has a range of software configurable options which can be used
to customize the operation of the mixer. It is possible to enable or disable
specific inputs, enable phantom power for the microphone channels and
limit which buses each channel can be routed to. Other settings control
auto cancelling of PRE FADE when the channel fader is opened and all the
remote output configurations.
The S0 v2 has an integral universal switch mode power supply, which uses
an IEC mains inlet.
Installation Notes
Atmosphere
The S0 v2 mixer should be installed in an area which is not subject to
excessive heat or cold. Also, you should avoid installing it in atmospheric
conditions which are dusty, smoky or dirty, or where there is moisture or
vibration. Do not use any liquids to clean the fascia of the mixer: a soft dry
brush is ideal. Use a clean cloth moistened with water or ethyl alcohol to
clean the trim. Other solvents may cause damage to paint or plastic parts.
Electromagnetic Radiation
Avoid using the S0 v2 mixer close to strong sources of electromagnetic
radiation such as, video monitors or high power electric cabling. This
may cause degradation of the audio quality due to induced voltages in
connecting leads and chassis. In all cases the S0 v2 mixer should be installed
and serviced by qualified personnel.

5
Introduction 1
Dimensions and Cut-Out Size for Flush Mounting
External dimensions: 483mm (W) x 356mm (D) x 125mm (H)
The cut-out size is for reference only and should be checked with your
mixer.
Fig 1-2: S0 v2 Mixer - Cut-out Sizes.
345mm
440mm

6
2 User Guide
Fig 2-1:
Channel 1
Rear Panel
Connectors.
2. User Guide
Many of the options and default settings described in this section
can be modified. Full details of all the configuration options and their
default settings can be found in the Configuration Options section on “3.
Configuration Options” on page 18.
S0 v2 Input Channels
The S0 v2 has 9 fixed format channels with up to 3 selectable inputs on
each channel.
Channels 1-4: Mono Balanced XLR Microphone / Stereo Unbalanced RCA
Line inputs
Channels 5-8: Dual Stereo Unbalanced RCA Line / USB Audio inputs
Channel 9: Telephone Interface / Stereo Unbalanced RCA Auxiliary
(Rear) / Stereo Unbalanced Jack Auxiliary (Front) inputs
Channels 1-4 Mono Balanced Mic/Stereo
Unbalanced Line inputs
MIC INPUT
This mono balanced XLR is the microphone input to the
channel. The S0 v2 supports both dynamic (unpowered)
and condenser (powered using 48V DC phantom power)
microphones. By default, only channel 1 is configured to
supply phantom power. The phantom power settings are
part of the Configuration Options.
MIC TRIM
This small multi turn screw adjuster sets the amplification
level for the microphone input, which is applied prior to
the channels TRIM control. The available gain range is
from +24dB to +65dB (ref -50dBu input) and allows a wide
range of microphone types to be used.
LINE INPUT
This stereo unbalanced RCA (phono) is the line input
to the channel. It has 10dB of gain at the input and is
designed to connect directly to consumer level equipment
such as CD players and other hi-fi equipment.
REMOTE OUTPUT
This 6.35mm (¼”) stereo jack socket is the remote
output for the channel. It can be used to control external
equipment such as turning on a “Mic Live” indication, or
starting a CD player. There are 2 separate signals, remote
start and remote stop, which are both open collector
outputs. These signals can be configured to act differently
depending on the input selected. The remote output
settings are part of the Configuration Options.
MIC / LINE Button
Pressing this button changes the channel input selection
between MIC and LINE. The button illuminates red
to indicate that the LINE input is selected. When the
channel’s fader is open, the input selection cannot be
changed. When the MIC input is selected, these channels
can be configured to supply 48V to microphones requiring
Phantom Power.
This button can be disabled so that the selected
input cannot be changed. The button operation and
phantom power settings are part of the Configuration
Options.
PGM Button
This button allows the output of the channel to be
mixed onto the Program Bus output. The button
illuminates green to indicate the channel is active on
Fig 2-2:
Channel 1 MIC/
LINE Button.

7
User Guide 2
the Program Bus. This button can be disabled via the
Configuration Options, so that it is permanently on
or off.
REC Button
This button allows the output of the channel to
be mixed onto the Record bus output. The button
illuminates red to indicate the channel is active on
the Record Bus. This button can be disabled via the
Configuration Options, so that it is permanently on
or off.
TRIM Control
This control allows the level of the audio on this
channel to be adjusted by ±15dB. This additional gain
is applied prior to the channels fader, and is useful
for setting relative levels between audio sources on
different channels.
Note: It is a good idea to set up all the audio channels
so that they are all at the same reference level when
the fader is fully up, meaning the mix levels are
determined solely by the position of the faders.
PAN/BAL Control
This control has two functions depending on whether
MIC or LINE is selected.
In MIC mode the control acts as PAN and allows the
mono input to be positioned in the stereo image.
With the control in the centre position, the signal is
present on both the left and right channels. Turning
the control fully anti-clockwise pans the signal
to the left by increasing the level by 3dB and the
signal on the right channel is turned off. Turning the
Fig 2-3: Mic/Line
Channel Strip.
control fully clockwise pans the signal to the right
by increasing the level by 3dB. The signal on the left
channel is turned off.
In LINE mode the control acts as BAL (balance) and
is used to alter the stereo image of the stereo input.
With the control in the centre position, the signal is
un-altered. Turning the control fully anti-clockwise
shifts the signal to the left by increasing the gain by
6dB and the signal on the right channel is reduced
by 6dB. Turning the control fully clockwise shifts the
signal to the right by increasing the gain by 6dB while
the signal on the left channel is reduced by 6dB.
CUE PFL Button
Selecting CUE PFL routes the pre-fader input signal
to the monitoring section where the signal can be
heard on the Monitor, Presenter or Guest headphones
(provided that the associated AUTO CUE/PFL button
is selected). The level can then be checked on the
meters
and adjusted via the TRIM control, and the pan
or balance can be set with the PAN/BAL control.
Provided that the fader is closed, the signal will not
be routed to the PGM or REC outputs even if they
are selected. This button is illuminated green to
indicate CUE PFL is active and it has a momentary and
latched action: if the button is held down, CUE PFL
is cancelled when released. There is a Configuration
Option to automatically cancel CUE PFL when the
fader is opened. This option is enabled by default.

8
2 User Guide
FADER Control
The 100mm VCA fader is a linear level control that
operates between fully attenuated in its lowest
position to unity gain when fully open.
START Button
This button has a different function depending on
whether MIC or LINE is selected. When in MIC mode,
the button is an indicator and shows the state of the
channel and the remote output as follows:
Off The channel is not routed to either
the PGM or REC bus.
Illuminated Red The channel is routed to the PGM
or REC bus, the fader is closed and
the remote stop output is enabled.
Illuminated Green The channel is routed to the PGM
or REC bus, the fader is open and
the remote start output is enabled.
This is the default operation when in MIC mode, but this
can be changed in the Configuration Options.
When in LINE mode, the button indicates the state of the
channel, and also controls the operation of the remote
outputs as follows:
Off The remote outputs are disabled.
Pressing the button will enable/
disable the remote outputs, but
they can only be disabled when the
fader is closed.
Flashing Red The remote outputs are enabled,
but the channel is not currently
Fig 2-4: Channel 1
FADER Control &
START Button.
routed to the PGM or REC bus so the remote start and
stop outputs are inactive.
Illuminated Red The remote outputs are enabled, the channel is
routed to the PGM or REC bus and the fader is closed.
If the fader is opened, the remote start output will
become active and give a momentary pulse for
0.5 seconds.
Illuminated Green The remote outputs are enabled, the channel is
routed to the PGM or REC bus and the fader is open.
If the button is pressed, the remote start output will
become active and give a momentary pulse for
0.5 seconds. If the fader is closed, the remote stop
will become active and give a momentary pulse for
0.5 seconds.
This is the default operation when in LINE mode, but
this can be changed in the Configuration Options.
Channels 5-8 Dual Stereo
Unbalanced Line/USB Audio Inputs
LINE INPUTS
The dual stereo unbalanced RCA phonos are the
line inputs to the channel. They have 10dB of gain
at the input and are designed to connect directly to
consumer level equipment such as CD players and
other hi-fi equipment. There are two stereo inputs per
channel fader.
REMOTE OUTPUT
This 6.35mm (¼”) stereo jack socket is the remote
output for the channel. It can be used to control
external equipment such as starting a CD player. There
Fig 2-5: Channel
5 Rear Panel
Connectors.

9
User Guide 2
are 2 separate signals, remote start and remote stop
which are both open collector outputs. These signals
can be configured to act differently depending on the
input selected. The remote output settings are part of
the Configuration Options.
INP1/INP2 Button
Pressing this button changes the channel selection
between the two LINE inputs. INP1 corresponds to
the lower numbered line input, i.e. on channel 5,
INP1 is line 5/1 and INP2 corresponds to the higher
numbered line input, i.e. on channel 5, INP2 is line
5/2. It can also be configured to allow the USB Audio
input to the mixer to be routed to this channel. The
button is illuminated red to indicate when the INP2
input is selected, and amber to indicate when the USB
Audio input is selected. When the channel’s fader is
open, the input selection cannot be changed. This
button can be disabled so that the selected input
cannot be changed. The button operation settings
are part of the Configuration Options. By default,
channel 8 is enabled for INP1/INP2 and USB Audio to
be selectable. For channels 5-7, INP1/INP2 only are
selectable.
PGM Button
This button allows the output of the channel to be
mixed onto the Program Bus output. The button is
illuminated green to indicate the channel is active on
the Program Bus. This button can be disabled via the
Configuration Options, so that it is permanently on
or off.
Fig 2-6:
Dual Stereo
Channel
Input & Bus
Selections.
REC Button
This button allows the output of the channel to be
mixed onto the Record bus output. The button is
illuminated red to indicate the channel is active on
the Record Bus. This button can be disabled via the
Configuration Options, so that it is permanently on
or off.
TRIM Control
This control allows the level of the audio on this channel
to be adjusted by ±15dB. This additional gain is applied
prior to the channels fader, and is useful for setting
relative levels between audio sources on different
channels.
Note: It is a good idea to set up all the audio channels
so that they are all at the same reference level when the
fader is fully up, meaning the mix levels are determined
solely by the position of the faders.
BAL Control
This control is used to alter the stereo image of the stereo
input. With the control in the centre position, the signal is
un-altered. Turning the control fully anti-clockwise shifts
the signal to the left by increasing the gain by 6dB with
the signal on the right channel reduced by 6dB. Turning
the control fully clockwise shifts the signal to the right
by increasing the gain by 6dB with the signal on the left
channel reduced by 6dB.
Fig 2-7: Dual Stereo
Channel Strip.

10
2 User Guide
CUE PFL Button
Selecting CUE PFL routes the pre-fader input signal to the monitoring
section where the signal can be heard on the Monitor, Presenter or
Guest headphones (provided that the associated AUTO CUE/PFL button is
selected). The level can then be checked on the meters and adjusted via
the TRIM control, and the balance set with the BAL control. Provided that
the fader is closed, the signal will not be routed to the PGM or REC outputs
even if they are selected. This button is illuminated green to indicate CUE
PFL is active and it has a momentary and latched action: if the button is
held down, CUE PFL is cancelled when released. There is a Configuration
Option to automatically cancel CUE PFL when the fader is opened. This
option is enabled by default.
FADER Control
The 100mm VCA fader is a linear level control that operates between fully
attenuated in its lowest position to unity gain when fully open.
START Button
This button indicates the state of the channel, and also controls the
operation of the remote outputs as follows:
Off The remote outputs are disabled. Pressing the button
will enable/disable the remote outputs, but they can
only be disabled when the fader is closed.
Flashing Red The remote outputs are enabled, but the channel is
not currently routed to the PGM or REC bus so the
remote start and stop outputs are inactive.
Illuminated Red The remote outputs are enabled, the channel is
routed to the PGM or REC bus and the fader is closed.
If the fader is opened, the remote start output will
become active and give a momentary pulse for
0.5seconds.
Illuminated Green The remote outputs are enabled, the channel is
routed to the PGM or REC bus and the fader is open.
If the button is pressed, the remote start output will
become active and give a momentary pulse for
0.5 seconds. If the fader is closed, the remote stop
will become active and give a momentary pulse for
0.5 seconds.
This is the default operation, but this can be changed in the Configuration
Options.
Channel 9 Telephone Interface/
Stereo Unbalanced Auxiliary Inputs
AUX INPUT
This stereo unbalanced RCA (phono) is the auxiliary
input to the channel. It has 10dB of gain at the input
and is designed to connect directly to consumer
level equipment such as CD players and other hi-fi
equipment. There is a second auxiliary 3.5mm stereo
jack socket input, which is also routed to channel
9, which is located on the front panel below the
monitor mute indicator. The AUX inputs can be
mixed or selected independently depending on the
Configuration Options chosen.
R-BAL and C-BAL Controls
These small multi turn screw adjusters are used to
tune the telephone interface to the characteristics of
a standard analogue telephone line. They are factory
set and should not need to be adjusted.
LINE (Telephone Interface)
This RJ11 socket allows the S0 v2 to be connected
directly to an analogue telephone line.
Fig 2-8: Channel
9 Rear Panel
Connectors.