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Audio Developments AD071

3 Inputs Handmade Portable Mixer 

This small size and low weight portable mixer lends itself to being mounted on a camera or attached to a belt. It has 3 inputs and 2 outputs with limiters on microphone inputs and the main outputs. There are two configurations; a one mic plus two line inputs or three mic inputs. It is capable of being set and left to process the audio. 


  • Mic Inputs: 1 or 3 electronically balanced type with XLR connector, 48V phantom power, high-pass filter, gain control and mic or line input selection
  • Line Input: Instrumentation grade electronically balanced with gain/level control 
  • Routing: Each input is routed to left, right or left and right by two toggle switches 
  • Output: Electronically balanced with XLR type connectors and stereo rotary level control. Can be unbalanced without loss of level or degradation of quality. A push-button switch selects line or microphone output levels to the XLR connectors. A 3.5mm jack socket carries output signals at microphone level
  • Limiters: Incorporated in the microphone inputs and the two main outputs. The mic input limiter is permanently in circuit. A push-button switch introduces the output limiters into circuit and two LEDs indicate the onset of limiting
  • Line-Up Oscillator: 1kHz tone injected output level
  • Powering: Either external power via a 4pin Hirose connector, or a separate PP3 mixer. A LED indicates power present and flashes when the voltage is too low


  • Max Gain: Mic 68dB, Line 38dB 
  • Max Input: Mic 0dBu, Line +20dBu
  • Input Impedance: Mic > 2kΩ, Line > 10kΩ
  • Mic Power: +48V Phantom
  • Frequency Response: +0; -1.5dB 20Hz to 20kHz 
  • Hi Pass Filter: -3dB @ 110Hz 12dB Octave 
  • Harmonic Distortion, Crosstalk, Max Output Level: +18dBm 
  • Output Impedance: Noise 200R Source < 80dB SNR; Line 20Hz - 20kHz 
  • Limiter Threshold: +8dB 
  • Powering: Internal 1 x PP3 Cells, External 9V to 15V DC
  • Current Consumption: 120mA 
  • Dimensions: 135 x 95 x 44mm
  • Weight: 400gms 
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KEM Systems Ltd
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Design & Implemented Site: ClickMedia

MONDAY / FRIDAY 09.30 - 19.00
4 Krimeas str. Ampelokipi 11526
210 - 67 48 514
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