If you're putting together a multi-room audio/video system that involves longer cable runs between rooms, check out the Niles C5-HDDA. This clever device uses durable, inexpensive CAT-5 cable to send standard- or high-definition component video and digital audio signals to another room in your house. It's a great option for homes with an existing CAT-5 network, since you won't have to install any new in-wall wire. And it delivers crisp, detailed sound and high-def video, even over cable runs of up to 500 feet.

How it works
You'll need to purchase two baluns to set up a fully functioning system. You can use two C5-HDDAs, or pair one with an in-wall model. Connect the first one to a satellite receiver, high-def disc player, or other A/V source in your main room, and plug it into a nearby CAT-5 outlet. Next, connect your second C5-HDDA to a CAT-5 outlet in your remote room. Then hook it up to a TV and A/V receiver via its component video and coaxial digital audio jacks. The compact C5-HDDA doesn't require AC power, and it's wall-mountable for flexible placement.

What is a balun?
A balun gets its name by converting signals between balanced and unbalanced lines. Balanced cables can carry signals over much larger distances than unbalanced lines, because of their superior noise rejection. The C5-HDDA balun converts audio/video signals between balanced CAT-5 connections and unbalanced component video and coaxial digital audio connections.

Product Highlights:

  • two Niles component video and coaxial digital audio baluns required for a fully functioning setup
  • gold-plated component video and coaxial digital audio inputs/outputs
  • shielded Ethernet jack
  • supports resolutions up to 1080i
  • maximum range: 500 feet (high-definition); 1,000 feet (standard-definition)
  • video bandwidth: 60 MHz
  • audio bandwidth: 25 MHz
  • not compatible with Wi-Fi® adapters
  • cannot share CAT-5 cable with other signals
  • universal mounting holes
  • component video and coaxial digital audio cables required for installation (sold separately)
  • 4-13/16"W x 1"H s 2-5/16"D
  • warranty: 10 years
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

Download owner's manual

  • CAT-5/Component video & Coaxial digital audio Transformer
  • Installation guide

Product Research



Product Overview: The C5-HDDA is a transformer to convert a CAT-5 signal to component video and coaxial digital audio, and vice versa. Typically two are used at opposite ends of the signal path; one unit converts the component video and coaxial digital audio source to CAT-5 for transmission over a long distance, a second unit converts the CAT-5 signal back to component video and coaxial digital audio to feed a remote audio video system.


A/V: Female RCA component video and RCA coaxial digital audio, can be used as an input and converted to CAT-5 or as an output to feed an audio video system

CAT-5: RJ-45 jack, can be used as an input and converted to component video and coaxial digital audio or as an output to feed a network



  • Video: 0-60 MHz, -3 dB
  • Digital Audio: 25 MHz, -1 dB

Transmission Distance:

  • 480i/p: 1000' (300m)
  • 720p: 500' (150m)
  • 1080i: 500' (150m)

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Niles C5-HDDA Reviews

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It works

Written By no, Doylestown, PA on Thursday, October 22, 2009

Crutchfield Customer Review (What's this?)

This unit works well, you will need to purchase a pair, one local and one remote units, I ran one line of cat 6, I have a DVR in the LR hooked up to a TV with HDMI cable, and I used the component out with the digital coaxial out to the local unit, cat 6 to the remote unit and component out to the TV, the Video is pretty good (HD 1080i) so is the audio, a bit expensive but it will pay for itself in a year. Im pretty happy with it, to control the dvr in the lr from the mb Im using a remote rf extender wich I had for years, my order arrive the very next day that I placed the order, crutchfield is the best!

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