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.
