View the Sonifex S2 Brochure
Dave Langer (Creative Services)
DIGITAL I/O ANALOGUE
RADIO BROADCAST MIXER
S2 Introduction
S2 is a new breed of radio broadcast mixer. Using the latest technology
components, S2 offers digital audio quality with analogue reliability in a
modular format. S2 has both digital and analogue input channels, together
with simultaneous analogue and digital outputs.
Following on from the Sovereign range of audio mixers, S2 combines
all the features needed of a radio broadcast mixer in a stylish, flushmounting chassis : a wide range of input and output channels, PFL/cue,
fader-start operation of equipment, automatic monitor muting on mic-live,
light controlling remote outputs, optional EQ on input modules, gram amp
input options and 2 main audio buses, allowing you to broadcast on the
PRG bus while recording on the AUD bus, with bus output selection on
each module.
Innovative Design
The S2 chassis is available in 5 module width sections, allowing 5, 10, 15, 20, 25
and 30 module width mixers. This means S2 can be used for small newsrooms or
large on-air situations.
Modular "pop-up" input and output channels means that the mixer can be maintained
simply and quickly. Hot-swappable input channels can be individually removed and
repaired whilst still on-air.
The angle of the meterbridge can be varied and set for best viewing position.
Any module can be in any position so that customizing the mixer for your own purposes
is easy.
Large back-lit buttons allow you to see the status of the mixer at all times.
The fitted rear panel hides all cable connections but can be simply unclipped and
reclipped for maintenance.
2
The modular design of the desk gives you the flexibility to expand it at a later date.
You can even add another S2 mixer and link them together with a bus connector
cable to allow for split desk configurations.
S2 Introduction
Superb Audio Quality and Unquestionable Reliability
The S2 uses the latest Crystal semiconductor technology to allow input and output of
digital audio signals up to 24 bit, 96kHz sample rate.
The analogue signal paths use low noise circuitry to provide superb audio performance
well capable of satisfying radio listeners worldwide.
The high reliability and build quality of S2 minimises the chance of failure, avoiding lost
air-time. Each module is individually checked twice before being assembled into the
finished chassis and the whole unit is tested before shipping.
ALPS long throw 100mm faders give a smooth, repeatable response and the XLR Neutrik
connectors used are an industry standard.
The use of VCAs controlled by the faders ensures tight stereo tracking and eliminates
mechanical and electronic noise.
S2 has a separate 2U power supply providing regulated, ripple-free power to the mixer.
There is also an optional switcher to control 2 power supplies providing redundancy.
High quality stainless steel is used for the chassis and screws to prevent corrosion in high
humidity environments.
Each channel is metal coated internally to provide exceptional EMC screening.
3
S2 Input Channels
There is a wide choice of input channels for the S2 mixer. Each channel
has a number of common features :
Assigning an Input Channel to an Output Bus - Switches at the top
of the channel are used to select the output group routing, to either
Program, Audition, or both output busses. Selecting the PGM and/or
AUD buttons routes the channel audio to the PGM and/or AUD mix
busses. The buttons illuminate green to indicate the routing status.
Changing the Input Level - Coarse gain is set using preset
potentiometers on the channel circuit board (see back page for gain
ranges) which allow unbalanced inputs to be used on mono and stereo
line inputs. The front panel TRIM control allows fine gain of ±12dB.
Changing the Signal Pan, or Balance - the BAL/PAN control is used
on mono channels to pan the mono input signal in the stereo image and
on stereo channels to balance the stereo image.
CUE/PFL (Pre Fade Listen) - Selecting the CUE/PFL button routes the
pre-fader input signal to the monitoring system where the signal can be
heard via headphones and/or loudspeakers. The button lights green
S2-CMM Mic/Mic Channel
Fader Start & ON Button Control - The ON button works in conjunction
with the 100mm long-throw carbon fader and is used to control channel
remotes (e.g. starting a CD player), routing and timers, etc. When unlit,
the channel is off. Flashing red indicates that the channel has been
selected to ON but not routed to either PGM or AUD. Steady red
indicates that the channel is ON and "armed", ready for the fader to be
raised. Raising the fader changes the illumination to green indicating
that the channel is live. Alternatively, with the button unlit the fader may
be raised and the channel can be operated simply by selecting ON.
The illumination in this case toggles between unlit (channel OFF) and
green (channel ON).
Scribble Pad - A scribble pad is provided at the bottom of the channel
for user labelling of the channel function.
S2-CML Mic/Line Channel
The Mic/Mic Input channel is a dual mono
microphone input with a button switch to
select either Mic 1 or Mic 2.
The Mic/Line Input channel is a mono input
with a button switch to select either Mic or
Mono Line.
Each Mic input has jumper settable phantom
power available at +48V and a high pass
filter to remove low frequency rumbles.
When enabled, the LF response of the
microphone is rolled off at 125kHz, 6dB
per octave.
For the Mic input, phantom power at +48V
can be configured. The Mic input has a jumper
selectable high pass filter to remove low
frequency rumbles.
If the Mic input is used for the presenter's
mic it can also become the talkback mic.
If the Mic input is used for the presenter's
mic it can also become the talkback mic.
The talkback function will be retained when
the channel input is switched to Line.
Equalisation is fitted as standard on this
channel and is enabled by the EQ button,
providing 10dB cut and boost at HF (6.5kHz)
and LF (100Hz).
Equalisation is fitted as standard on this
channel and is enabled by the EQ button,
providing 10dB cut and boost at HF (6.5kHz)
and LF (100Hz).
The BAL/PAN control operates as follows :
Full anti-clockwise pans the signal to the
left and increases the signal by 3dB (right
channel reduces by 70dB); full clockwise
pans the signal to the right and increases
the signal by 3dB (left channel reduces
by 70dB).
A balanced line level insert send and return is
available for the Mic input for the insertion of
an effects, or voice, processor into the mic
channel. The send and return is disabled in
Line mode.
A balanced line level insert send and return is
available for the Mic input. This is useful for
hooking up an outboard effects unit to be
used with the microphone.
There are logic remote input controls for
Mic Cough muting and Reverse Talkback,
together with two separate output controls
for Mic Cue lights, which can be momentary
or latching.
4
when CUE/PFL is active and a jumper option is available to
cancel the CUE/PFL selection when the fader is raised. This button
works with both a momentary and latched operation - if held down,
the selection is cancelled on release, otherwise the button is
alternate action.
There are logic remote input controls for Mic
Cough muting and Reverse Talkback. There
are output controls for Mic Cue lights and
separate line remote start/stop controls by
fader or ON button. Both latching and
momentary contacts are catered for.
The remote outputs on the 9 way D type
plug are fed from NPN opto-isolators.
The remote outputs on the 9 way D type plug
are fed from NPN opto-isolators.
The Mic input provides a jumper selectable
output to facilitate either Control Room
speaker or Studio speaker muting and the
channel can also be used to control either
one of two separate timer displays.
Both Mic inputs have a jumper selectable
output to facilitate either Control Room
speaker or Studio speaker muting and the
channel can also be used to control either
one of two separate timer displays.
In addition the Line input can be configured
with all the features of the Mic input when
used as a Mic input with an external
microphone amplifier, e.g. for monitor
muting purposes.
Gold plated Neutrik XLR connectors are used
for the audio inputs and outputs.
Gold plated Neutrik XLR connectors are used
for the audio inputs and outputs.
S2-CMM Mic/Mic Channel and S2-CML Mic/Line Channel
48V
ROUTING
MIC
GAIN
LINE
48V
LINE
TRIM
INSERT
AUD PFL C/FEED T/B
L R L R 1 2 1 2
TO LEFT
PGM OUTPUT
VCA
MIC
LINE
MIC 2
PGM
L R
MUTES
S2 Input Channels
TRIM
EQ
HF/LF EQ
PAN
PFL
TO RIGHT
PGM OUTPUT
VCA
INSERT
SEND
S2-CSG
FADER
CPU
TO TIMER
BUS
INSERT
RETURN
PGM
AUD
MIC CUE LIGHT
MIC
LINE
EQ
CUE
PFL
ON
TO METER
SELECT
LINE REMOTES
COUGH/REV T/B
T/B ENABLE
S2-CS
S2-CSE
Dual Stereo Line Channel
Dual Stereo Line Channel
with EQ
The Dual Stereo Line channel has two
balanced stereo inputs on Neutrik XLR
connectors.
The INP 1/INP 2 button selects which input
is routed through the channel. The button is
illuminated in red to indicate when Input 2 is
selected. The operation of the button is
inhibited when the channel is "live".
Stereo Line & Gram
Channel
S2-CSGE Stereo Line & Gram
Channel with EQ
This channel is the Dual Stereo Line channel
fitted with an RIAA input amplifier on the
second input. The balanced stereo line input
is on Neutrik XLR connectors and the
unbalanced RIAA stereo input on phonos.
The channel is used for connecting a
turntable or record deck. The GRAM inputs
have RIAA equalisation suitable for magnetic
pick-up cartridges.
Selecting the LINE/GRAM button switches
the channel input between Stereo Line and
RIAA . The button is illuminated in red to
indicate when Gram (RIAA) is selected.
The operation of the button is inhibited
when the channel is "live".
There are separate logic remote output
controls for both of the two inputs providing
start/stop functions by fader, or ON button.
Remotes, etc, are triggered when the fader is
up and the channel ON button shows green.
The start function can be configured to be
either momentary (500mS) or latched for each
input. The remote outputs on the 9 way D type
plug are fed from NPN opto-isolators.
There are separate logic remote output
controls for both of the two inputs providing
start/stop functions by fader, or ON button.
Remotes, etc, are triggered when the fader
is up and the channel ON button shows
green. The start function can be configured
to be either momentary (500mS) or latched
for each input. The remote outputs on the
9 way D type plug are fed from NPN
opto-isolators.
Continuous momentary start can also be
enabled such that when the fader is up and
the channel is on, each press of the ON
button triggers a momentary start.
Continuous momentary start can also be
enabled such that when the fader is up and
the channel is on, each press of the ON
button triggers a momentary start.
The BAL/PAN control adjusts the stereo
balance in the following manner : Full
anti-clockwise shifts the signal to the left
and increases the signal by 6dB (right
channel reduces by 6dB); full clockwise shifts
the signal to the right and increases the signal
by 6dB (left channel reduces by 6dB).
The BAL/PAN control adjusts the stereo
balance in the following manner : Full anticlockwise shifts the signal to the left and
increases the signal by 6dB (right channel
reduces by 6dB); full clockwise shifts the
signal to the right and increases the signal
by 6dB (left channel reduces by 6dB).
The 100mm VCA fader provides unity gain
when fully open. The channel input signal is
routed to the outputs whenever the fader is
open, the ON button is selected
and either or both of the routing
buttons are selected.
The 100mm VCA fader provides unity gain
when fully open. The channel input signal is
routed to the outputs whenever the fader is
open, the ON button is selected
and either or both of the routing
buttons are selected.
The S2-CSE channel is the
Dual Stereo Line channel as
above but fitted with equalisation,
providing 10dB cut and boost
at HF (6.5kHz) and LF (100Hz).
The EQ button places the
equalisation in and out of the
signal path. The button is
illuminated in yellow when the
EQ is active.
The S2-CSGE channel is the
Stereo Line & Gram channel
as above but fitted with
equalisation, providing 10dB
cut and boost at HF (6.5kHz)
and LF (100Hz). The EQ button
places the equalisation in and
out of the signal path. The button
is illuminated in yellow when the
EQ is active.
The channel can be used to
control either one of two separate
timer displays.
The channel can be used to
control either one of two separate
timer displays.
5
S2 Input Channels
S2-CDS
Digital Dual
Stereo Channel
S2-C6SS 6 Way Stereo Source
Select Channel With EQ
The Digital Dual Stereo channel has two 24-bit
96kHz digital inputs with an INP 1/INP 2 button
switch to select between them. The button is
illuminated in red to indicate when Input 2 is
selected. The operation of the button is
inhibited when the channel is "live".
The 6 Way Stereo Line Source Select channel
has 6 balanced stereo inputs on a 25 way
D-type connector selectable by a 6 way
mechanical interlocking switch bank,
numbered 1 - 6. A depressed button
indicates the selected input.
Either input can be configured to be balanced
AES/EBU on standard XLR, or S/PDIF on
phono sockets, selected by internal jumpers.
The switch bank also controls 6 sets of remote
outputs allowing each source to have a set of
start/stop remotes. The remote starts can be
set as momentary or latching.
An additional jumper option can be used to
decode emphasis when indicated by certain
status bits in the incoming data stream.
Continuous momentary start can also be
enabled such that when the fader is up and
the channel is on, each press of the ON button
triggers a momentary start.
The digital signals are converted to analogue
and from this point the channel functions are
the same as the S2-CS Dual Stereo Line
channel with the addition that when the ON
button flashes green, it means that there is
no valid digital input.
The channel is fitted with EQ as standard and
other functions are similar to the S2-CSE Dual
Stereo channel with EQ.
The HF and LF controls are used to adjust the
equalisation of the signal. The HF control
boosts and cuts the signal by 10dB at 6.5kHz.
The LF control boosts and cuts the signal by
10dB at 100Hz. The EQ button places the
equalisation in and out of the signal path and
is illuminated yellow when the EQ is active.
S2-CDSE Digital Dual Stereo
Channel with EQ
The channel can be used to control either one
of two separate timer displays.
This channel is the Digital Dual Stereo
channel as above but fitted
with equalisation.
The HF and LF controls are used
to adjust the equalisation of the
signal. The HF control boosts and
cuts the signal by 10dB at 6.5kHz.
The LF control boosts and cuts
the signal by 10dB at 100Hz. The
EQ button places the equalisation
in and out of the signal path and
is illuminated yellow when the EQ
is active.
Both S2-CDS and S2-CDSE
channels can be used to control
either one of two separate
timer displays.
ROUTING
LEFT
TRIM
INPUT 1
LINE
LEFT
BAL
LEFT
TRIM
FADER
CPU
RIGHT
TRIM
PGM
A
AUD
INP 1
INP 2
EQ
1
3
2
C / FEED
LEFT
FROM PGM
OUTPUT L
2
3
NULL
2
1
AES/SPDIF INPUT
SELECT
INPUT 2
AES/EBU
ON
1
INPUT 1
AES/EBU
CUE
PFL
NULL
B
AES/SPDIF
D/A
C / FEED
RIGHT
FROM PGM
OUTPUT R
3
A
SPDIF
INPUT 2
B
INPUT 1 REMOTES
INPUT 2 REMOTES
6
PFL
VCA
INPUT 2
LINE
RIGHT
INPUT 1
S2-CB Blank Channel
TO S2-OMC &
S2-OMS CPU
VCA
HF/LF EQ
RIGHT
TRIM
INPUT 2
LINE
LEFT
INPUT 2
RIAA
OPTION
AUD PFL C/FEED T/B
L R L R 1 2 1 2
TRIM
EQ
LINE 2
INPUT 1
LINE
RIGHT
PGM
L R
MUTES
S2-CSG Stereo Line with Gram (S2-CSGE with EQ), S2-CS Dual Stereo (S2-CSE with EQ), S2-CDS Digital Dual Stereo
(S2-CDSE with EQ), S2-CSMM Stereo Mix Minus, S2-C6SS Stereo Source Select
STEREO MIX-MINUS VERSION
1
3
2
DIGITAL INPUT VERSION
6 x STEREO
BAL INPUTS
6 x REMOTE
START/STOP
6 WAY INPUT
AND REMOTE
OUTPUT
SELECTOR
LEFT INPUT AMP
RIGHT INPUT AMP
STEREO SELECTOR VERSION
This blank channel is used to fill
in areas of the mixer where you
don’t require an input or output
channel.
S2-CT Telco Input Channel
ROUTING
PGM
L R
AUD PFL C/FEED T/B
L R L R 1 2 1 2
MUTES
S2 Input Channels
PFL TO
METER SELECT
VCA
INPUT
INPUT
TRIM
EQ
HF/LF EQ
TRIM
PFL
PAN
TO TALKBACK
OUTPUT
VCA
C/FEED
OUTPUT
FADER
HYBRID LATCH
CPU
PGM
AUD
EQ
CUE
T/B
CLEANFEED
SELECTION
AND ROUTING
ON
S2-CSMM Stereo Mix Minus
Channel
The Stereo Mix-Minus channel has one
balanced stereo line level input and a
balanced stereo mix-minus output, on XLR
connectors. The channel is intended for use
where a remote stereo source, such as
another studio connected via ISDN, requires
a stereo cleanfeed return. The cleanfeed is
generated by the mix-minus method from
either the PGM or AUD outputs, depending
on the routing selection.
Selecting the CUE/PFL & T/B button routes
the pre-fader input signal to the monitoring
system where the signal can be heard via
headphones and/or loudspeakers. In addition,
talkback is routed to the cleanfeed output.
This enables the presenter/technical operator
to communicate with the remote source prior
to going live to air. PFL can be automatically
disabled when the fader is opened.
The outputs on the this channel can also
be configured by jumper settings as a mono
sum of mix-minus on the left channel and
continuous talkback on the right channel (for
some ISDN codecs and hybrid applications).
The fader, or ON button, control a logic remote
output function. The remote function can be
configured to be either momentary or latched.
The remote outputs on the 9 way D type plug
are fed from NPN opto-isolators.
Continuous momentary start can also be
enabled such that when the fader is up and
the channel is on, each press of the ON
button triggers a momentary start.
Selecting the PGM and/or AUD buttons routes
the channel audio output to the PGM and/or
AUD mix busses. Selecting the
PGM button also routes the PGM
main output via the mix minus
system to the cleanfeed output.
Selecting the AUD button routes
the AUD main output to the mix
minus system. The mix minus is
derived from the PGM output when
selecting both PGM and AUD.
Equalisation is fitted as standard
on this channel and operates in
the same was as on the S2-CDSE
channel.
The channel can be used to
control either one of two separate
timer displays.
NULL
L FROM AUD
R OUTPUT MIX BUS
S2-CT Telco Input Channel
The Telco Input channel controls the
connection to a telephone balance unit
(or hybrid). It has one balanced line level
mono input on Neutrik XLR, and one
balanced line level cleanfeed output to
return to the hybrid.
Selecting the CUE/PFL & T/B button routes
the pre-fader input signal to the monitoring
system where the signal can be heard via
headphones and/or loudspeakers. In addition,
talkback is automatically routed back to
the caller via the cleanfeed system. This
enables the presenter, or technical operator,
to communicate with the caller prior to
putting the caller live to air. PFL can be
automatically disabled when the fader
is opened.
There is a logic remote output to place
the hybrid "on hold" by using the LINE
HOLD button. The remote output on the
9 way D type plug is fed from an NPN
opto-isolator and it can be made momentary
or latching.
Selecting the PGM and/or AUD buttons
routes the channel audio output to the
PGM and/or AUD mix busses. The buttons
are illuminated in green to indicate the
routing status. Changing the status of the
PGM button is inhibited when the channel
is "live".
Selecting the PGM button also routes the
channel to one of the two true cleanfeed
busses (jumper selectable). When selecting
only the AUD button, for example to record
off-line telephone conversations, a cleanfeed
is generated via the channel
mix-minus system. When both
PGM and AUD are selected
the channel operates in the
true cleanfeed mode, sending
the PGM signal to the cleanfeed
bus.
Equalisation is fitted as
standard and is enabled by
the EQ button, providing 10dB
cut and boost at HF (6.5kHz)
and LF (100Hz). The EQ button
places the equalisation in and
out of the signal path and is
illuminated yellow when the EQ
is active.
7
S2 Output Channels
There are six different output channels available, for controlling
monitoring in both a Control Room and separate Studio,
with the two main output channels also having a master
fader option.
The master output channels provide balanced analogue audio
outputs as well as simultaneous AES/EBU or S/PDIF digital audio
outputs for both PRG and AUD busses. The analogue mono output can
be selected from PRG or AUD and meter selection is available to show
S2-OMC
either the PRG bus, AUD bus, or to follow the Control Room
Monitor selection.
Both Control Room and Studio Monitor channels are available for
controlling what’s routed to the presenter’s and guests’ headphones
and monitor speakers. 2 external inputs can also be monitored.
A minimum of 3 channels need to be fitted into a mixer : channels
S2-OMC, S2-ODP (or S2-ODPF) and S2-ODA (or S2-ODAF) must be
fitted and S2-OMS is optional.
Control Room Monitor
Channel
S2-OMS Studio Monitor Channel
The Studio Monitor channel is used for
the monitoring of various sources on the
studio loudspeakers (MONITOR) on a
6.35mm stereo jack socket and studio
headphones (PHONES) on a 6.35mm
stereo jack socket.
The Control Room Monitor channel is used for
the monitoring of various sources on the control
room loudspeakers (MONITOR) on a 6.35mm
stereo jack socket and presenter’s headphones
(PHONES) on 6.35mm stereo jack sockets.
Front panel control knobs are used to vary the
monitor and headphone levels and headphones
can be plugged in on the front or the rear of this
channel. The control room monitor loudspeaker
and headphone levels are variable between 0
(cut off) and 10 (max).
A front panel control is used to vary the
monitor level. The studio monitor loudspeaker
level can be variable between 0 (cut off)
and 10 (max). The output will need to be fed
to a suitable power amplifier to drive the
loudspeakers. Headphones with impedances
of 35 ohms and above can be driven directly
from the channel headphone connector on the
rear panel.
A four way electronically interlocking switch
bank selects the source routed to the speakers
and headphones from either of two external
inputs (EXT 1, EXT 2), the PGM, or AUD
output. The buttons illuminate to show the
selected source, PGM and AUD in green, EXT
1 and EXT 2 in red. The external inputs can be
used for monitoring an off air signal or another
studio output.
A four way electronically interlocking switch
bank selects the source routed to the
speakers and headphones from either of two
external inputs (EXT 1, EXT 2), the PGM, or
AUD output. The buttons illuminate to show
the selected source, PGM and AUD in green,
EXT 1 and EXT 2 in red. External inputs can
be used for monitoring an off air signal or
another studio output.
An illuminated Mute LED shows when a live
microphone channel in the control room has
muted the speakers, to prevent feedback. Mute
outputs on the remote connector of the PGM
output channel can be used to remotely
illuminate "Mic Live" lights.
An illuminated Mute LED shows when a live
microphone channel in the studio has muted
the speakers. Mute outputs on the remote
connector of the AUD output channel can be
used to remotely illuminate "Mic Live" lights.
AUTO CUE/PFL buttons adjacent to each level
control allow the monitoring of PFL when an
input channel has been selected to CUE/PFL.
In addition, SPLIT CUE/PFL can be selected to
the headphones, which will place the selected
source in mono in one ear and PFL in mono in
the other.
Green illuminated AUTO CUE/PFL buttons
adjacent to each level control allow the
monitoring of PFL when an input channel
has been selected to CUE/PFL, either to the
monitors or headphones.
This channel controls the signal conditioning for
the talkback input and output and routes these
signals to and from the talkback bus. Internal
jumpers can be configured to allow talkback to
replace or dim the selected source, dimming
independently on monitor speakers or
headphones.
A separate Studio T/B button is provided to
allow the presenter/engineer to talk to the
studio monitors and/or headphones and
internal jumpers allow this talkback to replace
or dim the selected source.
A Global Talkback system can be configured
to allow every contribution point in the control
room and studio to communicate with each
other via their microphone and headphones.
A Global Talkback system can be configured to
allow every contribution point in the control
room and studio to communicate with each
other via their microphone and headphones.
PGM
O/P
L R
AUD
O/P
L R
REV T/B
TIMERS
S2-OMS Studio Monitor Channel, S2-OMC Control Room Monitor Channel
PFL
T/B
O/P
O/P
L R 1 2
EXTERNAL
INPUTS
PGM
AUD
C/ROOM/STUDIO
MONITORS
EXT 1
LEVEL
CPU
TO S2-CT TELCO
CLEANFEED
SELECTION L&R
FROM
MUTES BUS
8
EXT 2
PRES/STUDIO
HEADPHONES
AUTO
CUE
AUTO
CUE
STUDIO SPLIT
T/B
CUE
STUDIO C/ROOM
LEVEL
CUE/PFL
MUTE/DIM
TALKBACK
GLOBAL T/B
REV T/B
TALKBACK
OUTPUT
TO MONITOR METERS
S2 Output Channels
PGM
O/P
L R
AUD
O/P
L R
REV T/B
TIMERS
S2-ODP Digital PGM Output Channel (S2-ODPF with Master Fader), S2-ODA Digital AUD Output Channel (S2-ODAF with Master Fader)
PFL
T/B
O/P
O/P
L R 1 2
FADER OPTION
FROM LEFT
PGM BUS
ANALOGUE PGM
(AUD) OUTPUT LEFT
FROM RIGHT
PGM BUS
ANALOGUE PGM
(AUD) OUTPUT RIGHT
A/D
OUTPUT
SELECT
CPU
DIGITAL
AUDIO
INTERFACE
ANALOGUE MONO
OUTPUT
PGM
METER
SELECT
METERBRIDGE
1
FROM
MUTES BUS
2
1
3
2
FROM L&R
PFL BUS
A
SPDIF PGM
(AUD) OUTPUT
B
SPDIF SYNC
3
S2-ODP ONLY
AES/EBU PGM
(AUD) OUTPUT
3
1
AES/SPDIF
CR
MON
2
AUD
FROM CPU
AES/EBU SYNC
AES/SPDIF
WORDCLOCK
S2-ODA
Digital AUD Output
Channel
S2-ODAF Digital AUD Output
Channel with Master
Fader
FROM TALKBACK
BUS
S2-ODP
S2-ODPF
Digital PGM Output
Channel
Digital PGM Output
Channel with Master
Fader
This channel is common to every mixer and
provides a digital and analogue output from
the PGM mix bus. The digital output is
available as a balanced AES/EBU signal via a
standard XLR or as S/PDIF on phono sockets.
The balanced analogue PGM output and
mono output is on a 15 way D type connector.
This also carries the two sets of latching relay
contacts for the control room mutes.
The main power input from the S2-PSU is
on this channel.
Button switches at the top of the channel
select the mono output source from either
PGM or AUD. The Mono compatible output
could be used to feed a mono transmitter or
any station output monitoring system that
requires a mono signal, such as a background
music system.
The digital output status bits (consumer or
professional), output sample size (16, 20 or
24 bits) and sample rate (automatically or by
internal jumpers from 32 kHz to 96 kHz) can
be set. The digital output can be synchronised
from an external input, or from an on-board
master clock. There are 4 different
sync modes : Master, Auto, Auto
Lock and Slave.
The illuminated LOCK LED shows
that the digital output is locked
to the onboard master clock,
incoming Word clock or AES/
EBU or S/PDIF sync signal.
The channel automatically locks
to a valid sync clock, flashing if
sync is lost. Synchronisation can
be jumper disabled.
The S2-ODPF channel also has
a 100mm VCA output fader for
production use which provides
unity gain when fully open.
This channel is also common to every mixer
and provides a digital and analogue output
from the AUD mix bus. The digital output is
available as a balanced AES/EBU signal via
a standard XLR or as S/PDIF on phono
sockets. The balanced analogue AUD outputs
are available on a 15 way D type connector
which also carries the two sets of latching
relay contacts for the studio mutes.
Button switches at the top of the channel
select the monitoring source to the
meterbridge. Meters in the meterbridge
which are connected to the "Monitor Meter"
position will display the selected signal from
the electronically interlocking PGM, AUD,
or CR MON buttons. The CR MON signal
source is whatever is being monitored on
the presenter's headphone on the control
room monitor channel, pre talkback and
level control. This signal could be PGM,
AUD, EXT 1, EXT 2, or PFL, as selected
by the presenter.
The digital output status bits (consumer or
professional), output sample size (16, 20 or
24 bits) and sample rate (automatically or by
internal jumpers from 32 kHz to 96 kHz) can
be set. The digital output can be synchronised
from an external input, or from an on-board
master clock. There are 4 different sync
modes : Master, Auto, Auto Lock and Slave.
The illuminated LOCK LED shows that the
digital output is locked
to the onboard master clock,
incoming Word clock or AES/EBU
or S/PDIF compatible sync signal.
The channel automatically
searches for a sync signal on
the Word Clock, or the selected
digital input, and automatically
locks to a valid sync clock.
If sync is lost then the indicator
will flash. Synchronisation can
be jumper disabled.
The S2-ODAF channel also has
a 100mm VCA output fader for
production use which provides
unity gain when fully open.
9
Meterbridge Modules
In the meterbridge area you can choose from four styles of metering, a dual timer, a
PFL/Talkback loudspeaker, 2 talkback modules and a range of blanking plates. S2's meterbridge
modules are freely assignable so that you can position them exactly where you want them.
S2-MT
The dual meter panels are used for monitoring console signal levels. Up to three different meter
panels can be housed in the meterbridge. The meters can be configured internally to be fed from
one of three signal sources, the selected source indicated by a LED :
Select
Each of the dual
timers can be
used for timing
events triggered
by Timer 1,
Timer 2, or the
Mic fader open
signal. In addition
the upper timer
is used for
displaying the time of day and the lower
timer for displaying the date. The illumination
pattern of the red LEDs indicates the timer
display mode.
The output of the meter switch on the AUD output module which can show PGM, AUD,
or CR MON, which is the selected monitor source on the control room monitor module,
(EXT 1, EXT 2, PGM, or AUD) interrupted by PFL.
Program PGM output which can optionally be interrupted by PFL.
The output of the PFL bus.
The S2-MPPM panel has two fast-reading
moving-coil meters with PPM-style scale.
The S2-MPPT panel has two moving-coil PPM
movements, conforming to true PPM ballistics.
The PPMs have a 1-7 scale and are
configured such that a 1kHz signal, at 0dB at
the PGM output, will indicate a meter reading
of 4. Each mark on the PPM scale indicates a
4dB change in signal level.
S2-MVU Meterbridge VU
Meter Panel
The S2-MVU two moving coil VU meters are
configured such that a 1kHz signal, at +4dBu
at the PGM output, will indicate a meter
reading of 0VU.
S2-ML53
S2-MTBS Meterbridge Station
Master Talkback
Panel
The date and time can be synchronised to a
very accurate internal clock or optionally from
an external source, MSF, DCF, SMPTE, or
RS232 time code string.
This is used for
interfacing with
a Sonifex Station
Master studio
switcher and
talkback router
and has buttons
for talkback ,
Offer and Accept
switching and
profanity delay control.
S2-ML
Meterbridge Loudspeaker
Monitor Panel
The S2-ML
speaker is used
for monitoring
PFL and reverse
talkback in the
control room
directly from
the mixer.
Two control
knobs are provided for adjusting the levels of
the PFL and Talkback signals from cut-off at 0
to unity gain at 10. The speaker is muted
automatically when the control room mute is
active, to prevent feedback.
S2-MTB6 Meterbridge 6 Way
Talkback Panel
This is used for
communicating
with up to 6 other
locations, studios
or mixers. While
a button is
pressed, the
switch is
illuminated and
the talkback is
active. The buttons work with both a
momentary and latched operation - if held
down, the selection is cancelled on release.
Otherwise the button is alternate action.
S2-MB1-5 Meterbridge Blanking
Plates 1 - 5
Meterbridge blanking plates are available in
channel widths from 1 to 5 inclusive and are
used to fill areas in the meterbridge not
occupied by active modules.
S2-MPPM/T Meterbridge PPM Panel, S2-MVU Meterbridge VU Meter Panel, S2-ML53 Meterbridge LED Meter Panel, S2-MTBS Station Master and
S2-MTB6 6 Way Talkback Panels, S2-MT Meterbridge Dual Timer Panel, S2-ML Meterbridge Loudspeaker Monitor and Talkback Panel
PGM AUD
O/P O/P
R L R
L
REV T/B
S2-MPPM Meterbridge PPM
Meter Panel
S2-MPPT Meterbridge True PPM
Meter Panel
TIMERS
PFL
Meterbridge Dual Timer
Panel
PFL
T/B
O/P
O/P
L R 1 2
FROM MONITOR OUTPUT
Meterbridge LED
Meter Panel
S2 - ML
REV T/B
CUE/PFL
TALKBACK
LOUDSPEAKER
S2 - MT
DUAL TIMER, CLOCK AND DATE DISPLAY
CUE/PFL REV T/B
START
STOP
RESET
MODE
START
STOP
RESET
MODE
TO CLEANFEED
LEFT (S2-CSMM)
PGM METERS
MONITOR METERS
PFL METERS
S2 - MPPM
DUAL PPM METER PANEL
S2 - MPPT
TRUE DUAL PPM METER PANEL
S2 - MVU
DUAL VU METER PANEL
S2 - ML53
DUAL LED BAR GRAPH METER
TO CLEANFEED
RIGHT (S2-CSMM)
10
The LED meter consists of 53 LEDs showing
both VU and peak representation. Both PPM
and VU scales are shown, one on each side of
the LED bar-graph.
Chassis
Chassis Design
S2-05 Chassis
Chassis with 5 channel
width sections.
The S2 chassis is available in 5 channel width
sections, allowing 5, 10, 15, 20, 25 and 30
channel width mixers. This means S2 can
be used for small newsrooms or large
on-air situations.
S2-15 Chassis
Model No.
Chassis with 10 channel
width sections.
S2-30 Chassis
Chassis with 30 channel
width sections.
Chassis with 15 channel
width sections.
S2-20 Chassis
S2-25 Chassis
S2-10 Chassis
Chassis with 20 channel
width sections.
Chassis with 25 channel
width sections.
Number of Channels
Model No.
Number of Channels
S-05
5
S-20
20
S-10
10
S-25
25
S-15
15
S-30
30
S2-BI Bus Interlink Cable
S2-PSU Power Supply
This is used to connect two S2 chassis so that
they can function as one mixer. Note that a
maximum total of 30 channels is allowed.
The S2-PSU is a 2U high rack-mount unit,
which supplies power to the entire range of S2
mixers. A lead with a special 9 pin D-Type
socket on each end is used to connect the
power supply to the S2-ODP PGM output
channel on the mixer.
Four LED's on the front of the unit indicate
whether the power to the four voltage rails is
being supplied correctly.
S2-PSUS
S2-7SS Script Space
S2-PSU Front Panel.
Dual Power
Supply Switcher
The S2-PSUS is a power switcher which takes
the power feeds from 2 x S2-PSU units and
switches between them in the event of failure.
With LED failure indicators and GPI alarms,
the S2-PSUS is the perfect dual redundant
power supply module.
S2-PSU Back Panel.
The Script Space occupies an area of 7
channel widths, and is designed to hold
documents or scripts for the mixer operator
when desk space is at a premium.
11
S 2 Te c h n i c a l S p e c i f i c a t i o n
Input/Output Impedances
Mic Input:
> 1k5 ohms
electronically balanced
Mono Line Input:
> 20k ohms
electronically balanced
Stereo Line Input:
> 20k ohms electronically balanced
PGM & AUD Output:
< 75 ohms electronically balanced
Mono Output:
< 75 ohms electronically balanced
Monitor Outputs:
< 75 ohms unbalanced
AES Input/Output:
110 ohms
S/PDIF Input/Output:
75 ohms
BNC Wordclock input:
50 ohms
Every stage in the manufacture
of Sonifex products is carried out
in purpose-built headquarters
in the heart of the UK, from initial
design to final test and delivery.
Sonifex is a BABT approved
manufacturing facility with a licence
to build telecommunications
equipment and all telecom products
are compliant with BS6301,
BS7002, BS415 and CTR21.
Input/Output Gain Range
Mic Input:
Preset pot +13dB to +66dB ref
-50dBu, TRIM pot ±12dB
Mono Line Input:
Preset pot -6dB to +10dB ref
0dBu, TRIM pot ±12dB
Stereo Line Input:
Preset pot -6dB to +10dB ref
0dBu, TRIM pot ±12dB
Telco Input:
Preset pot -6dB to +10dB ref
0dBu, TRIM pot ±12dB
Telco Output:
Preset pot -6dB to +4dB ref
0dBu
Mix Minus Input:
Preset pot -6dB to +10dB ref
0dBu, TRIM pot ±12dB
Mix Minus Output:
Preset pot -3dB to +3dB ref 0dBu
Digital Input:
0dBFS = +12dBu on input;
TRIM pot ±12dB allowing 0dBu to
+24dBu
Digital Output:
0dBFS = +18dBu
Frequency Response
Mic Input:
40Hz to 20kHz, -1dB,+0dB (-3dB
at 130Hz with HPF in)
Line Inputs:
20Hz to 20kHz, - 0.5dB,+0dB
RIAA Input:
30Hz to 16kHz ±1.5dB RIAA
equalised
Noise (20Hz to 20kHz)
Mic Input E.I.N.:
-129dB with 150 ohm source
Stereo Inputs
-89dB ref 0dB
(fader down, no routing):
Stereo Inputs(fader down,
one channel routed):
Stereo Inputs (unity gain,
no routing):
Stereo Inputs (unity gain,
one channel routed):
Stereo Inputs (unity gain,
two channels routed):
Distortion
Total Harmonic Distortion:
Crosstalk
Inter-channel:
Stereo:
-89dB
-89dB
-86dB
-83dB
0.015% at 1kHz, 0dB
0.025% at 10kHz, 0dB
< -90dBu
-90dBu at 1kHz
-87dBu at 10kHz
Equalisation
LF Shelving at 100Hz:
HF Shelving at 6.5kHz:
Range
Pan Range:
±7dB
±7dB
Pot position: Fully clockwise,
centre, fully anti-clockwise;
Left: Off, 0dB, +3dB; Right: +3dB,
0dB, Off respectively.
Balance Range:
±6dB
Common Mode Rejection Ratio
Mic Input:
> 100dB at 70dB gain
Digital I/O
Sync Input Sample Rate:
30kHz - 100kHz
Output Sample Rates
32kHz, 44.1kHz, 48kHz, & 96kHz
(Using Onboard Clock):
Output Sample Width:
16, 20, 24 bit
Output
Headphone Output Load: >45 ohms, 400 ohms
recommended
Maximum Output
+26dBu balanced
(Analogue):
into 2k or greater
Power
Power (S2-PSU):
Filtered IEC, switchable 115V,
230V, fused, 210W max.
S2 Mixer Weights and Boxed Dimensions
Mixer Type
Width (cm)
Depth (cm)
Height (cm)
Gross Weight (kg)
Nett Weight (kg)
S2-30
137
70
45
36
34
S2-25
100
70
45
33
31
S2-20
100
70
45
30
28
S2-15
100
70
45
27
25.5
S2-10
60
70
45
24
22.5
S2-05
60
70
45
21
19.5
Notes: Weights are approximate and based on a mixer chassis loaded with channels.
S2 Mixer Viewed from Side Profile
S2 Placement in Cut-Out Viewed from Above
276mm
40mm
179.7mm
506mm
7°
10mm
116.8mm
23.4mm
Mounting Holes 5mm Diameter
505mm
520.5mm
564.5mm
196 mm S2-5
387mm S2-10
577mm
768 mm
958 mm
1149 mm
S2-15
S2-20
S2-25
S2-30
Front Edge
www.sonifex.co.uk
Distributed By:
Artwork No.: AW10173A Stock Code: 30-216
In an effort to continually improve equipment
performance, Sonifex reserve the right to alter
product specifications from those given in this
brochure. Errors and omissions excepted.
© Sonifex 2004
DAVE LANGER (Creative Services)
27 Cavendish Road, Salford, M7 4WP, England.
Telephone: 44 161 740 7171 Facsimilie: 44 161 792 9595
Internet: http://www.jingle.org E-mail: info@jingle.org
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