SRM On-Air mixing console

Esta compacta y configurable mesa de mezclas On-Air está diseñada para las pequeñas estaciones de radio comunitarias y radios locales, SRM es la definitiva mesa de mezclas que permite estar en las ondas con el mínimo coste y tiempo. Se trata de un completo centro de control fácil de operar, de alta calidad para la radiodifusión. Diseñado directamente para trabajar con equipos semi-pro o domésticos, el SRM ofrece casi todas las facilidades y funciones automáticas que se encuentran en equipos más grandes pero a un precio más competitivo. El SRM se suministra en varios tamaños y se puede configurar con diferentes módulos.

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  • MAIN OUT: Main outputs are transformer balanced signals on XLR's for driving the transmitter or studio transmitter link without any problems with interfacing.
  • TAPE OUT: The same signals unbalanced on PHONO connectors for the RECORD inputs of recording equipment.
  • METER: Main out is permanent displayed on the internal LED PPM, a stereo 19 segment meter with DIN standard ballistics and a range of -40 to +3dB with reference to the nominal +6 dBu output level.
  • LIMITER: An internal limiter guards the output level in a unique and practice oriented way: the output level is measured and compared to a reference. If the output exceeds this threshold, a control voltage is generated and applied to all channel VCA's resulting in a gain reduction. This means that all postfader signals, like foldback, telephone sends etc. are also held under control. The limiter action is displayed by a LED in the meter area.
  • CONTROLROOM MONITOR: Four circuits are available: CR loudspeakers, CR headphones, external meter and CUE loudspeaker.
  • CR LOUDSPEAKERS: To be selected to desk output or to an OFF AIR receiver for a check of the entire transmission path. Can be set to automatic change over to the CUE system. Automatic MUTE on opening of a control room microphone channel and DIM on using the talkback facilities.
  • CR HEADPHONES: Reproducing the same signals as the loudspeakers without influence from MUTE- and DIM functions.
  • EXTERNAL METER: Connections for a second meter, wired to the control room monitoring, that can be used for pre-set or checking an input channel via the CUE system.
  • CUE LOUDSPEAKER: An output for a small speaker, wired to the CUE signals with DIM and MUTE action. This speaker can be mounted in the optional meter bridge or you can use a stand alone active speaker.
  • SIGNALIZATION: An opto-isolated output tor driving RED LIGHTS via a suitable interface (e.g. EA862 red-light relays unit) on opening of one or more CR microphones.
  • STUDIOMONITOR: Two circuits, one for studio loudspeakers and one for presenters headphones. Can be used with EA853 studio interface.
  • STUDIO LOUDSPEAKER: Reproduction of all post fader signals, except those from studio microphones to prevent feedback. Can be dimmed and overridden with talkback, unless a studio microphone is opened.
  • STUDIO HEADPHONES: To be used by a presenter hearing a main mix. Talkback is always possible. The talkback source is jumper selectable and can be the internal microphone with limiter or a prefade output from a control room microphone.
  • SIGNALIZATION: An opto isolated output for driving RED LIGHTS in the studio to indicate open microphones there.
  • Voltages in dBu are referred to 0 dBu = 0.775 V
  • Fader position is at the 0 mark
  • Balanced outputs are loaded with 600 Ohms
  • External sources have an impedance of 200 Ohms
  • Noise measurements are unweighted RMS, 22 Hz to 22 kHz
  • Signal to noise ratio's are referred to + 6 dBu

FREQUENCY RESPONSE: 20 Hz - 20 kHz (0, -1dB)



  • stereo channels & - 60 dB
  • mono channels & - 70 dB
  • fader cut off & - 100 dB


  • AII faders closed - 86 dB
  • One channel unity gain - 80 dB
  • Equivalent input noise microphone channel - 126 dBu

DISTORTION: Mic.- or line input with nominal output & 0.03%

INPUTS min. gain max. gain Impedance
Microphone 28 dB 78 dB 1700 Ohm
Line 0 dB 21 dB 90 kOhm
Telephone 0 dB 21 dB 600 Ohm
OUTPUTS nom. level max. level Impedance
Balanced outputs +6 dBu +21 dBu 40 Ohm
Unbalanced o/p +6 dBu +21 dBu 50 Ohm
Telephone send -4 dBu +10 dBu 600 Ohm


  • Threshold (fixed) + 6 dBu
  • Attack time 10 mSec
  • Release time (program dependant) 0.3 to 3 Sec
  • Ratio (program dependant) > 40 : 1