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RDL EZ-HK3 Audio / Video Hum Killer

RDL EZ-HK3 Audio / Video Hum Killer

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Special Order
Ship Time: 7-10 business days 
Free Standard Shipping
Not eligible for free Expedited Shipping

Product Highlights

  • A / V Ground-Loop Hum Elimination
  • Composite Video Galvanic Isolation
  • Unbalanced Stereo Galvanic Isolation
  • Input & Output RCA Jacks
  • Switch-Selectable Ground Lift for Output
  • Portable Use or Permanent Installation
  • Gold-Plated Connectors
  • Excellent Video Frequency Response
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You Pay: $94.00

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The RDL EZ-HK3 Audio / Video Hum Killer is a high-quality video transformer isolation module. It's designed specifically for use with unbalanced high impedance audio inputs and 75 ohm composite video. The device features both input and output connections on gold-plated RCA jacks. Each input jack is electrically isolated from the case itself, as well as from the output ground. Each output jack is connected to the rear-panel ground-lift switch, which is designed to eliminate hum due to ground loops. Ground loops are common when the EZ-HK3 is installed between a video source, such as a computer or DVD player, and the input of a grounded video monitor or projector in an AV or video system.

Key Features

Composite Video Input
Connect the video output from the audio/video source to the composite video input RCA jack
Stereo Audio Inputs
Connect the audio output from the audio/video source to the RCA jacks
Composite Video Output
Connect the video output to the A/V system or equipment video input
Stereo Audio Outputs
Connect the audio outputs to the A/V system or equipment audio input
Ground-Lift Switch
The audio and video output cable shields are connected to the EZ-HK3 chassis when the switch is in the NORM position. In the unlikely event that the EZ-HK3 chassis is mounted to equipment with a different ground from the equipment the EZ-HK3 output is feeding, a ground loop could be produced. This ground loop is eliminated by setting the switch to the LIFT position


Audio and video ground-loop hum elimination
Unbalanced stereo galvanic isolation
75 ohms composite video galvanic isolation
Portable use or permanent installation
Input and output RCA jacks
Excellent low and high video frequency response
Gold-plated connectors
Video Output Composite Video (1 V p-p nominal)
Output Impedance Video: 75 ohms
Audio:10 kohms
Video Bandwidth 40Hz to >5MHz
Audio Input Stereo on RCA Phono jacks (-10dBV nominal, ground-isolated)
Audio Input Impedance 10 kohms
Audio Output Stereo on RCA Phono jacks, -10dBV nominal
Audio Frequency Response 20Hz - 20kHz (±1dB)
Total Harmonic Distortion (THD) <0.05% (1kHz)
Crosstalk Channel to Channel: <-75dB (20Hz - 10kHz) / <-65dB (10kHz to 20kHz)
Video to Audio: <-80dB (referred to -10dBV)
Audio to Video: <-85dB (referred to 1 V p-p)
Output Isolation Output Ground Isolation: Switch-Selectable (lifts audio and video grounds)
Gain Audio/Video: Unity Nominal (passive circuit)
Mounting Size 1/6 rack width
Dimensions (WxD) 2.9 x 3.0" (7.4 x 7.6 cm)
Weight Not specified by manufacturer
RDL EZ-HK3 Audio / Video Hum Killer
  • 4 x Rubber Feet
  • Set of Mounting Screws
  • 3-Year Warranty
  • Be the first to review this item


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    Special Order ?
    This item is usually Drop Shipped from the MFR/Distributor within 7-10 business days (subject to availability). Your order will be charged at the time of placing the order with the MFR. Item is non-cancelable and non-returnable.
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    PayPal orders will be charged when the order is placed.
    International Orders
    For international orders, credit cards will be charged at time you place your order.
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