Noise Gate 904

dbx Inc.; Waltham (MA)

Data
Forum
Pictures
Collections

  • Year
  • 1990 ??
  • Category
  • Miscellaneous (Other, Various) - see notes
  • Radiomuseum.org ID
  • 298160

 Technical Specifications

  • Main principle
  • Audio-Amplification; Hi-Fi-High End products
  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Noise Gate 904 - dbx Inc.; Waltham MA
  • Shape
  • Rack
  • Dimensions (WHD)
  • 38 x 133 x 262 mm / 1.5 x 5.2 x 10.3 inch
  • Notes

  • Input Impedance: Balanced = 25K Ohms
    Unbalanced = 18.5K Ohms
    Output Impedance: 22 Ohms, designed to
    drive 600 Ohms or greater
    Maximum Input Level: +24 dBm
    Maximum Output Level: +24 dBm into 600 Ohms or greater
    Frequency Response: 20Hz -20kHz (+0, -1 dB)
    Distortion: THD at 1kHz <.02%
    Equivalent Input Noise: -82 dBm, 20Hz - 20kHz Bandwidth, unweighted
    Attack Rate: Variable 500 dB/ms to 2.5 dB/ms
    Release Rate: Variable 2.5 dB/ms to 22 dB/sec
    Threshold: Variable -40 to +10 dB (7.75 mV to 2.5 V)
    Expansion Ratio: Variable 1.5:1-5:1
    Maximum Attenuation: >60 dB

    Key Input Impedance:
    Balanced = 250K Ohm
    Unbalanced = 185K Ohm

    Controls: Attenuation
    Limit, Ratio, Threshold, Attack, Release

    Switches:
    In/Out, Gate, Key

    Indicators:
    In/Out, Gate, Key

    Metering: LED
    Column -2,4,6,8,10,15. 20,30,40,60 dB gain reduction
    Power Supply
    Requirements: ±15V
    Regulated at 60ma, ± 24V Unregulated at 30ma

    Features
    1.Over Easy® expansion
    2. External "Key" input
    3. Gate Mode
    4. Control Voltage output (50mV/dB)

  • Net weight (2.2 lb = 1 kg)
  • 0.3 kg / 0 lb 10.6 oz (0.661 lb)
  • Author
  • Model page created by Bartosz Szwed. See "Data change" for further contributors.

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