Audio/Video Hum Killer

  • Audio and Video Ground-Loop Hum Elimination
  • Unbalanced Stereo Galvanic Isolation
  • 75 Ohm Composite Video Galvanic Isolation
  • Input and Output RCA Jacks
  • Switch-Selectable Ground Lift for Output Jacks
  • Portable Use or Permanent Installation
  • Portable Use or Permanent Installation
  • Ground-Lift Switch
  • Excellent low and high video frequency response
  • Description

    The EZ‑HK3 is a superior-quality stereo audio and composite video transformer isolation module for use with unbalanced, high impedance audio inputs and standard 75 ohm composite video. Input and output connections are provided on gold-plated RCA jacks.

    The shield connection of each INPUT jack is electrically isolated from the case and from the output ground. The shield connection of each OUTPUT jack is connected to the case shield through a rear-panel ground-lift switch.

    The EZ-HK3 eliminates hum due to ground loops when it is installed between an unbalanced audio/video source, such as a computer or DVD player, and the input of a grounded amplifier and video monitor or projector in an A/V system.


    Video Output:Composite Video, 1 V p-p nominal
    Output Impedance:75 Ω
    Video Bandwidth:40 Hz to >5 MHz
    Audio Input:Stereo on RCA Phono jacks, -10 dBV nominal, ground-isolated
    Audio Input Impedance:10 kΩ
    Audio Output:Stereo on RCA Phono jacks, -10 dBV nominal
    Audio Output Impedance:10 kΩ
    Audio Frequency Response:20 Hz to 20 kHz (± 1 dB)
    Audio Total Harmonic Distortion:<0.05% (1 kHz)
    Crosstalk (channel to channel):<-75 dB (20 Hz to 10 kHz), <-65 dB (10 kHz to 20 kHz)
    Crosstalk (video to audio):<-80 dB (referred to -10 dBV)
    Crosstalk (audio to video):<-85 dB (referred to 1 V p-p)
    Output Ground Isolation:Switch-selectable (lifts audio and video grounds)
    Gain (audio and video):Unity nominal (passive circuit)
    Case dimensions:2.9” (7.4 cm)W x 3” (7.6 cm)D
    Mounting size:1/6 rack width
    Package Type:Cardboard Box
    Tariff code:8543.70.9860
    WEEE weight:0.31 lbs.
    Shipping Weight:0.465 lbs.
    Package Dimensions:3.625 x 4.625 x 2.125 in.

    Related Products

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    • AV-HK1

      “HUM KILLER” Stereo Audio Isolation Transformer - Dual RCA inputs and outputs

    • EZ-HK1

      Stereo Audio Hum Killer

    Transformer Products
    • EZ-HK2

      Composite Video Hum Killer

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      CAD FilesUnitsFormat
      Engineering Functional BlockAmericanDXF
      Panel Diagram - FrontAmericanDXF
      Panel Diagram - RearAmericanDXF
      Panel Diagram - FrontMetricDXF
      Panel Diagram - RearMetricDXF
      High Res ImagesFormat
      Declaration of Conformity


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