Indiana University Equipment Specifications

3.2.3 Audio Mixer

Description

Audio mixer is capable of receiving number of audio signals from variety of sources and mixing before amplification.

Features:

  • Gain Control Level --- to allow input signal adjustment to the optimal level
  • High, mid, and low equalizer for signal inputs
  • Two Aux outputs one placed before channel fader and the other after
  • Peak Indicator --- to detect the level of the signal at a point after EQ with warning lights for level of signal above 3dB and before approaching clipping level
  • PFL Switch --- to check the input signal of a specific channel or trouble-shoot a channel
  • Channel Fader --- to control the output level of input channel signal, adjusting volume balance between channels
  • Balance Control --- for left and right location of stereo input signal
  • Stereo left and right Master Control --- for final signal level of the outputs
  • Aux Return --- for two channels control of the input levels form the effect units connected to aux return.
  • Aux Send --- for two channels to adjust the level of signals that are output to Aux Send
  •  Output Level Meter --- for right and left channels
  • Tape Inputs with Control
  • Microphone In --- at least three XLR microphone inputs
  • Line In --- to allow balanced phone jack inputs for equipment with line-level audio outputs (minimum 12 stereo inputs)
  • Record Output

Specifications:

  • Inputs:
    • Microphone IN --- Gain Trim, 2.5K ohms inputs impedance and 50-600 ohms (microphone) nominal, sensitivity input level (nominal) (–60) dB Max. and (-14) dB Min., Standard XLR connector
    • Line IN --- Gain Trim, 47K ohms input impedance and 600 ohms (line) nominal, sensitivity input level (nominal) (-36) dB Min. and (+10) Max., Phone jack balanced connector
    • Aux Return --- (10)K ohms input impedance and 600 ohms (line) nominal, sensitivity input level (nominal) (-10) dB, Phone jack unbalanced connector
    • Tape IN --- (10)K ohms input impedance and 600 ohms (line) nominal, sensitivity input level (nominal) (-10) dB, RCA jack balanced connector
  • Outputs:
    • Stereo Outputs --- 75 ohms impedance and 600 ohms (line) nominal, output level (nominal) (+4) dB , Phone jack connector
    • Aux. Send --- 75 ohms impedance and 600 ohms (line) nominal, output level (nominal) (+4) dB , Phone jack connector
    • Monitor Out ---- 75 ohms impedance and 600 ohms (line) nominal, output level (nominal) (+4) dB , Phone jack connector
    • Record Out --- 600 ohms impedance and 10 ohms (line) nominal, output level (nominal) (-10) dB , RCA jack connector
  • General:
    • Maximum Output Level ---- (+20) dB Stereo and Aux Send  @ 600 ohms, at 1kHz
    • Total Harmonic Distortion --- <0.1% @+14 dB 20Hz-20kHz
    • Frequency Response --- 20Hz- 20kHz
    • Hum and Noise --- (-100) dB
    • Cross talk --- (-70 dB) @ 1Khz
    • Cain Control --- (46) dB Variable range
    • Stereo Out Graphic EQ --- (+- 12) dB @ 100, 400, 1k, 5k, 10kHz
    • Channel PEAK Indicator --- Red LED on each channel lights when post EQ signal reaches 3dB below clip level
    • AC Power --- 120 V, 60Hz
    • Warranty --- three years parts and labor if available, one year required

09/25/00


Last Updated: 26 September 2000
URL:  http://www.indiana.edu/~classrms/audiomixer.html
Comments to: teach@indiana.edu
Copyright 2000, the Trustees of Indiana University