The Sonifex S1 mixer is a compact, low cost, fixed-format mixing console designed for on-air radio use. It can be fitted flush into a desk-top or can be rack-mounted by the addition of optional rack ears. With a comprehensive set of features it offers a solution appropriate to the needs of community, educational and student radio stations that need a versatile, reliable radio broadcast mixer. It has a 'no compromise on quality' approach, but offers simple, reliable operation.
Each channel has 100mm ALPS long-throw faders controlling voltage controlled amplifiers (VCAs) for reliability. Each has remote control outputs, including fader start for ancillary equipment. General purpose input/output facilities may be programmed and provision is made for mic-live/on-air sign switching. Separate 'telco' and stereo clean feed outputs are present for use with a telephone hybrid and codec respectively. In addition to the main stereo output mix there are two auxiliary mixes, pre or post fader selectable. There are both analogue and digital inputs and outputs. Monitor outputs are provided for presenter headphones, guest headphones and speakers. A pair of LED meters indicate audio levels. There are advanced automation facilities and remote control is available using the free SCi software. The rear connectivity panel can be rotated through 90 degrees onto the base of the chassis, providing easier access to connections when rack mounted.
The front panel has ten strips of controls for the ten input channels. The upper row of controls are source-selection buttons which illuminate when the second choice is selected. Channels one, two and five are mono channels and have, at the top, microphone/line selection buttons, in the case of the the first two, and microphone / telephone on channel five. Channels three and four have microphone/line selection buttons; the line input may be stereo or mono, depending on the connector used. Channels six to ten are stereo channels; the switches offer a choice of input one or input two, except in the case of channel six which offers input one or the stereo clean feed input, for use with such applications as ISDN CODECS, or two-studio link ups. The next row of controls are rotary faders for auxiliary send one. The following row are for auxiliary send two. Next there is a row of rotary controls offering plus or minus 7dB of high frequency boost or cut, then there are ten controls offering the same boost or cut at low frequency. Each channel then has a trim controls offering plus or minus 12dB of gain, followed by pan controls for the mono channels and balance controls for the stereo channels. A row of cue or pre-fade listen buttons latch and illuminate when selected except channels five and six which offer cue/PFL with talkback. Penultimately there are ten 100mm faders, driving VCA circuitry for reliability and good stereo tracking, followed by a row of channel 'ON' buttons, which latch and illuminate when pressed, other than channel five which also 'holds' the telephone line by remote control of an external telephone balance unit (not included). Channel 7 also has a 3.5mm jack socket for playing back from an mp3 player or similar device.
On the upper right two LED bar-graph meters describe an arc; which, for left and right, can be selected to be either PPM or VU ballistics, which is indicated by two LEDs. The meters show the level of a source selected by an illuminated latching switch offering a choice of the main programme output or the selection heard in the presenter's headphones and on the loudspeaker outputs. This is selected with a five-way, electronically-interlocking switch-bank with a choice of the programme output, the two auxiliary outputs or the two external inputs, which can be used for a receiver to check the broadcast 'off air' or the output of another studio. Three 'Auto CUE/PFL' switches, next to rotary volume controls for the presenter's headphones, the loudspeaker output and the guest headphones allows the normal monitoring source to be overridden when a channel 'CUE/PFL' is activated. As a result, each of the three outputs can monitor the signals on the pre-fade monitoring subsystem. In the case of the presenter's headphones, the meters will also show the level of the pre-fade source. A 'TALKBACK' button associated with the guest headphones allows the presenter to talk to a guest using input channel one as the talkback source; return talkback from another location is fed into the presenter's headphones. A 'SPLIT CUE/PFL' button adjacent to the presenter's headphone controls places the selected source in mono in one ear and the 'CUE/PFL' signal in mono in the other. An LED indicates when the loudspeakers are muted by a live microphone, another LED shows when the digital output is locked to either an internal or external clock.
Two rotary faders adjust the level of the two auxiliary outputs. Two associated switches are used to select, globally , whether the relevant auxiliary-send source is either pre or post the main channel faders.
The majority of connections are made on the rear panel. Channels one, two and five, which are mono, each have a pair of XLR connectors for the balanced microphone and line inputs. Adjacent to each pair there are push switches to increase the gain of the line input by 10dB, and to apply 48 volt phantom power to the microphone. Channels 3 and 4, which are stereo, each have an XLR for a mono microphone signal and a combination XLR and jack connector; the XLR is for a balanced, mono input, the jack provides an unbalanced connection for a stereo device. Channels six to ten each have stereo inputs, the first, in all cases, consisting of a pair of XLR connectors at line level with a push-switch to increase the gain by 10dB. The second input for channel six is a pair of balanced XLR connectors for the stereo clean-feed input, again with a +10dB push-button. Channels seven and eight each have a pair of RCA(phono) sockets for unbalanced connections. Channels nine and ten have both RCA(phono) and optical connectors for digital S/PDIF sources. External inputs use a 9-pin D-sub connector, with push switches to increase the gain of external inputs one and two by 10dB.
The analogue outputs are two pairs of balanced XLR connectors for the main stereo output and the stereo clean feed, useful for an ISDN CODEC. The digital output is presented on both an XLR for AES/EBU and an RCA(phono) type for S/PDIF. XLR, RCA(phono) and BNC connectors provide sync inputs for AES/BU, S/PDIF and word clock respectively. The 'telco' clean feed output is a male XLR. Stereo auxiliary outputs use a 9-pin D-sub connector. Analogue outputs for the presenter's and guest's headphones are two 6.35mm stereo jack. The output to a power amplifier for loudspeaker monitoring uses a similar type. RS232 control and the talkback interface each have a a 9-pin D-sub connector, the meter bridge interface uses a 15-pin variant, and two 25-pin types provide remote control and general purpose interfacing connections. The power socket is an IEC inlet.
As is the case with all Sonifex designs, the S1 offers appropriate performance for it's intended application, in some parameters often well in advance of those needs. For in-depth performance figures, as well as a more detailed description, please visit www.sonifex.co.uk or contact Technical Support.
Power source: 85-264V AC, 47-63Hz, 45W nominal, 50W peak. Dimensions: 445 x 400 x 156 (w x d x h)mm. Cut-out dimensions: 440 x 381(d x w) mm.
Included accessories: Manual, AC power cable.
Optional accessories: The S1-RCK brackets mount the S1 in 9 units of a standard 19-inch rack. The S1-CLR wooden collar allows the S1 to be flush-mounted at an angle, using a surrounding collar.