Sonifex S2 - Digital I/O Analogue Radio Broadcast Mixer with 10 channels

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S2 is a modular broadcast mixer which 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.

Model/Product no.: SF-S2

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Sonifex S2 - Digital I/O Analogue Radio Broadcast Mixer

S2 logo

Sonifex S2 is a modular broadcast mixer which 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, flush-mounting 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 customising 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.
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 with script space, image.

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 1U 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.

S2 Input Channels - Intro 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 buses. Selecting the PGM and/or AUD buttons routes the channel audio to the PGM and/or AUD mix buses. The buttons illuminate green to indicate the routing status. Changing the Input Level - Coarse gain is set using pre-set potentiometers on the channel circuit board 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 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. 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). Programmable Button Settings To make the S2 modules as flexible as possible, every button on each channel can be set to a number of different modes to aid the use of the mixer and allow for extra functionality. Each button can be set to either operate manually, be permanently on, or permanently disabled. Also, the ON button can be configured to operate in a number of modes, altering remote start functions, and the channel ON function can be controlled remotely by automation playout systems, such as RCS® or VCS. Scribble Pad - A scribble pad is provided at the bottom of the channel for user labelling of the channel function.
Input Channels - List
S2-CMM	Mic/Mic Channel	more >>
S2-CML	Mic/Line Channel	more >>
S2-CS	Dual Stereo Line Channel	more >>
S2-CSE	Dual Stereo Line Channel with EQ	more >>
S2-CSG	Stereo Line & Gram Channel	more >>
S2-CSGE	Stereo Line & Gram Channel with EQ	more >>
S2-CDS	Digital Dual Stereo Channel	more >>
S2-CDSE	Digital Dual Stereo Line with EQ	more >>
S2-CDAS	Dual Stereo Line Channel	more >>
S2-CDASE	Dual Stereo Line Channel with EQ	more >>
S2-C6SS	6 Way Stereo Source Select Channel with EQ	more >>
S2-CSMM	Stereo Mix Minus Channel	more >>
S2-CT	Telco Input Channel	more >>

Faders And Blank Channels
S2-PG	S2 Penny & Giles Conductive Plastic Fader	more >>
S2-CB	S2-Blank Channel	more >>
S2 Output Channels - Intro 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 buses. The analogue mono output can be selected from PRG or AUD and meter selection is available to show 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 guest’s 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.
Output Channels - List
S2-OMC	Control Room Monitor Channel	more >>
S2-OMS	Studio Monitor Channel	more >>
S2-ODP	Digital PGM Output Channel	more >>
S2-ODPF	Digital PGM Output Channel with Master Fader	more >>
S2-ODA	Digital AUD Output Channel	more >>
S2-ODAF	Digital AUD Output Channel with Master Fader	more >>

S2 Meterbridge Modules - Intro In the meterbridge area you can choose from four styles of metering, a phase meter, a dual timer, a PFL/Talkback loudspeaker, 2 talkback modules, a 6 input source selector 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’s meterbridge modules are freely assignable so that you can position them exactly where you want them. 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 - 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. PFL - The output of the PFL bus.
Meterbridge Modules - List
S2-ML	S2-Meterbridge Loudspeaker Monitor Panel	more >>
S2-MT	S2-Meterbridge Dual Timer Panel	more >>
S2-MTBS	S2-MTBS Meterbridge Station Master Talkback Panel	more >>
S2-MTB6	S2-Meterbridge 6 Way Talkback Panel	more >>
S2-M6SS	S2-Meterbridge 6 Button Stereo Source Select	more >>
S2-MPPM	S2-Meterbridge PPM Meter Panel	more >>
S2-MVU	S2-Meterbridge VU Meter Panel	more >>
S2-ML53	S2-Meterbridge LED Meter Panel	more >>
S2-MPH	S2-Meterbridge Phase Meter Panel	more >>
S2-MSB1	S2-Meterbridge Switch Panel with 1 Button	more >>
S2-MSB3	S2-Meterbridge Switch Panel with 3 Buttons	more >>
S2-MB1 to S2-MB5	S2 Meterbridge Blanking Plate (1 Channel Width to 5 Channel Width)	more >>
	S2 Rubber Keyswitch Buttons	more >>
Back to S2 Contents >
S2 Chassis Design 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.
S2-05	S2-Chassis with 5 channel width sections	more >>
S2-10	S2-Chassis with 10 channel width sections	more >>
S2-15	S2-Chassis with 15 channel width sections	more >>
S2-20	S2-Chassis with 20 channel width sections	more >>
S2-25	S2-Chassis with 25 channel width sections	more >>
S2-30	S2-Chassis with 30 channel width sections	more >>
Back to S2 Contents >
S2 Power Supply
S2-PSU	S2-Power Supply	more >>
S2-PSUS	S2-Dual Power Supply Switcher	more >>

S2 Script Space
S2-7SS	S2-7 Script Space (7 Channels Wide)	more >>
S2-10SS	S2-10 Script Space (10 Channels Wide)	more >>
Back to S2 Contents >
S2 Cable
S2-BI	S2-Bus Interlink Cable	more >>

S2 Mixer Placement In Furniture - Weights And Boxed Dimensions
Mixer Type	Width (cm)	Width (inches)	Depth (cm)	Depth (inches)	Height (cm)	Height (inches)	Gross Weight (kg)	Gross Weight (lbs)	Nett Weight (kg)	Nett Weight (lbs)
S2-30	137cm	53.9”	70cm	27.6”	45cm	17.7”	36kg	79lbs	34kg	75lbs
S2-25	100cm	39.4”	70cm	27.6”	45cm	17.7”	33kg	73lbs	31kg	68lbs
S2-20	100cm	39.4”	70cm	27.6”	45cm	17.7”	30kg	66lbs	28kg	62lbs
S2-15	100cm	39.4”	70cm	27.6”	45cm	17.7”	27kg	59lbs	25.5kg	56lbs
S2-10	60cm	23.6”	70cm	27.6”	45cm	17.7”	24kg	53lbs	22.5kg	50lbs
S2-05	60cm	23.6”	70cm	27.6”	45cm	17.7”	21kg	46lbs	19.5kg	43lbs
Notes: Weights are approximate and based on a mixer chassis loaded with channels.



Top View	Side View

Technical Specification For S2
Input/Output Impedances
Mic Input:	> 1k5Ω electronically balanced
Mono Line Input:	> 20kΩ electronically balanced
Stereo Line Input:	> 20kΩ electronically balanced
PGM & AUD Output:	< 75Ω electronically balanced
Mono Output:	< 75Ω electronically balanced
Monitor Outputs:	< 75Ω unbalanced
AES Input/Output:	110Ω
S/PDIF Input/Output:	75Ω
BNC Wordclock input:	50Ω

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 150Ω source
Stereo Inputs (fader down, no routing):	-89dB ref 0dB
Stereo Inputs (fader down, one channel routed):	-89dB
Stereo Inputs (unity gain, no routing):	-89dB
Stereo Inputs (unity gain, one channel routed):	-86dB
Stereo Inputs (unity gain, two channels routed):	-83dB

Distortion
Total Harmonic Distortion:	0.015% at 1kHz, 0dB 0.025% at 10kHz, 0dB

Crosstalk
Inter-channel:	< -90dBu
Stereo:	-90dBu at 1kHz

Equalisation
LF Shelving at 100Hz:	±7dB
HF Shelving at 6.5kHz:	±7dB

Range
Pan Range:	off/-3dB centre/off
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 (Using Onboard Clock):	32kHz, 44.1kHz, 48kHz, & 96kHz
Output Sample Width:	16, 20, 24 bit (24 bit on V2 ODA/ODP)

Output
Headphone Output Load:	>45Ω, 400Ω recommended
Maximum Output (Analogue):	+26dBu balanced into 2kΩ or greater

Power
Power (S2-PSU):	Filtered IEC, switchable 115V, 230V, fused, 210W max.
Dimensions (S2-PSU): (Raw):	48cm (W) x 24.3cm (D) x 8.8cm (H) 19” (W) x 10” (D) x 3.5” (H)
Dimensions (S2-PSU): (Boxed):	51cm (W) x 41.5cm (D) x 17cm (H) 20” (W) x 16.3” (D) x 6.7” (H)
Weight (S2-PSU):	Nett: 6kg Gross: 7.8kg Nett: 13.2lbs Gross: 17lbs
Dimensions (S2-PSUS): (Raw):	48cm (W) x 23cm (D) x 4.4cm (H) 19” (W) x 9” (D) x 1.7” (H)
Dimensions (S2-PSUS): (Boxed):	55cm (W) x 39.3cm (D) x 8.5cm (H) 21.6” (W) x 15.5” (D) x 3.4” (H)
Weight (S2-PSUS):	Nett: 1.58kg Gross: 2kg Nett: 3.5lbs Gross: 4.4lbs

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Sonifex S2 - Digital I/O Analogue Radio Broadcast Mixer

Innovative Design

Superb Audio Quality and Unquestionable Reliability

S2 Input Channels - Intro

Input Channels - List

Faders And Blank Channels

S2 Output Channels - Intro

Output Channels - List

S2 Meterbridge Modules - Intro

Meterbridge Modules - List

S2 Chassis Design

S2 Power Supply

S2 Script Space

S2 Cable

S2 Mixer Placement In Furniture - Weights And Boxed Dimensions

Technical Specification For S2

Input/Output Impedances

Input/Output Gain Range

Frequency Response

Noise (20Hz to 20kHz)

Crosstalk

Equalisation

Range

Common Mode Rejection Ratio

Digital I/O

Output

Power