Transmit HDMI over Standard Coaxial Cable

Finally a way to wire and distribute HDMI signals over existing Coax Cabling.

The Intelix DIGI-HD-COAX extenders allow you to transmit HDMI 1.3 signals through a single coaxial cable.  This transmission system is the first of it’s kind and will simplify commercial and residential installations by allowing the use of existing, previous installed standard definition coaxial cabling.;

The Intelix DIGI-HD-COAX system works by installing an DIGI-HD-COAX  Transmitter at the equipment source location and then an DIGI-HD-COAX  Receiver at each HDMI TV or Monitor Display location.  Only one transmitter is required and each Receiver can be daisy chained eliminating the need for home run wiring, expensive HDMI wiring or expensive HDMI Active Baluns which use Cat5 cabling.

By using a single COAX cable for transmission to networked TV’s the use of the Intelix DIGI-HD-COAX system greatly simplifies installations and lowers both labour and material costs for new or some existing installations.

(Ideal for Schools, churches, homes, restaurants, etc …  with existing coax cabling)

Intelix designed the DIGI-HD-COAX for demanding commercial and residential audio-visual applications, the DIGI-HD-COAX employs Intelix’s industry-leading HDMI processing to ensure audio and video perform flawlessly up to 675 feet using RG6 or RG59. Plus, built-in 1×2 distribution amplifiers split video signals to two independent outputs, thereby allowing dual distribution systems and/or daisy chaining.

Both the transmitter and receiver include two BNC to F adaptors, ensuring compatibility with different cable terminations.


  • Extend HDMI over a single coaxial cable. Forget expensive HDMI cables and the distance limitations of twisted pair, the DIGI-HD-COAX transmits HDMI over a single RG6 or RG59 cable.
  • Support two simultaneous displays. The DIGI-HD-COAX transmitter features dual outputs, allowing two distribution paths to operate simultaneously.
  • Daisy-chain multiple remote displays. The DIGI-HD-COAX receiver features a looping output, allowing the multiple receivers to be connected to a single transmitter.
  • BNC or F connectors. The DIGI-HD-COAX features a sturdy, professional-grade BNC connector. For installations with F connectors, Intelix includes two BNC to F adaptors at no charge.
  • HDMI 1.3 and HDCP compliant. The DIGI-HD-COAX is HDMI 1.3 and HDCP compliant.
  • Built Intelix tough. The DIGI-HD-COAX features a durable metal chassis.

The Intelix DIGI-HD-COAX is not really a consumer product, but more of a professional installation or pro-sumer installation.  DJ’s Sound City and ION Security are trained, experienced systems integrators able to design reliable HDMI Video Networks in your home, office or commercial building.  Call DJ’s Sound City today at 780-489-5522 or email for a Free On-Site Evaluation of your HDTV project.

Other Applications:

(Replacing that old RGB projector? Leverage the existing coax for HDMI! The DIGI-HD-COAX transmits 1080p video over a single RG59 or RG6 cable.)

(Digital Signage applications are plagued by distance and resolution limitations. The DIGI-HD-COAX expands horizons with HD distances up to 300 feet and SD distances up to 675 feet. Plus, built-in amplifiers provide seamless daisy-chaining between displays.)

(Homes want HDMI but are stuck with coax. The solution? The DIGI-HD-COAX distributes 1080p HDMI over a single RG59 or RG6 cabling just call DJ’s Sound City today for a Free Estimate and on-site evaluation)

(Typical DIGI-HD-COAX System wiring diagram)

(DIGI-HD-COAX LineDrawings)

If you would like more information and pricing on the Intelix DIGI-HD Coax System call DJ’s Sound City today at 1-888-489-5522 or email

ION Security and DJ’s Sound City are a full systems integration company with more than 2o years experience, serving Edmonton and surrounding communities within 150kms.

Check out ION Security’s website at:

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26 Responses to Transmit HDMI over Standard Coaxial Cable

  1. terry boyd says:

    what price do these retail at? also do they come as a pair, transmitter and reciever. thanks.

    • djsedm says:

      The intelix DIGI-HD-COAX units are sold separately since one transmitter can service several TV’s.

      Retail Pricing is:

      $449 for the Receiver DIGI-HD-COAX-R
      $369 for the Transmitter DIGI-HD-COAX-T

      At these prices units aren’t cheap however there can be substantial labor savings on installations which already are wired with coax. These units can also be a life saver on jobs where is this no practical way to run cat 5 in an existing building.

  2. TheDevian says:

    If I could afford to spend that much money on a converter I would just buy a new TV, this is insane!

    • djsedm says:

      Yes these units are the pricey however if you purchased another TV you’ve still have the same problem of how to get HDTV to it. These units are designed to distribute HDTV signals over existing coaxial cabling therefore the cost savings is in the labor and materials not having to purchase a HDMI video splitter/amplifier, not having to run new Cat5 or Cat6 cabling to each TV location, not having to purchase a HDMI to Cat5/6 Balun or repeater, and not having to spend time to run the new cabling to the flat panel display. When you add all these savings up the cost of the HDMI over Coax Converter is more economical and in some cases where you can’t run new cabling these units are the perfect solution. Yes they’re not cheap but they’re not intended to everyday installations but specific, mostly commercial applications. There is also another unit called a ZeeVee Box which is also reviewed on another post which does HDTV transmission over coax differently but still with the same result. Once again for specific applications the ZeeVee boxes are also handy units when all other options won’t work.

  3. Steve S says:

    If I had a PS3 in one room and wanted to display the content (games, bluray, movies, photos, etc) on three other displays would this unit work.?? How would i set it up?

    • djsedm says:

      Yes this would work however there are less expensive options. This box is meant to use existing coax wiring so you would need to have a coax ran from one room to the other, odds are you would be able to run a CAT5 cable between rooms then you could use a different adapter called an active balun with would convert HDMI signal and transmit it on CAT5 cable to your other TV then convert it back to HDMi – total cost for that solution would be about $300 bucks or at least half of this one.

  4. kareem says:

    If we pass HDMI signal through CAD 5 cable how many pair we have to use from cad 5 cable
    -If we use coaxial cable to pass HDMI signal using Digi-HD-COAX, what about the remote signals(mean changing the channels from another place.

    With Thanks

    • djsedm says:

      This balun or extender uses COAX there are other baluns which use a single CAT5 or CAT 6 and other HDMI Baluns which use double or 2 (two) Cat5 or Cat6 cables.

  5. Jon says:

    I bought the transmitter and receiver. I am now on my third set. The first two did not work. Finally the third set worked but its slow & flaky half the time. I bought the transmitter from VEC in Virginia & receiver at the Ron Kirk at VEC has been very supportive and pushed Intelix to send me the third set immediately after the second bad set which I returned..He is still willing to take it back if I continue to have problems. it costs me $12 each time I return a set. These items sell between $450 to $500 for the set. They are expensive. It’s cheaper to run HDMI cable – 75 foot is around $65 at monoprice, another DVR box on the second set side, or other options.

    if you have plenty of time and don’t mind being frustrated accepting a good picture, but slow connects to the transmitter when you change stations on a tivo premiere – sometimes before the picture comes in.. It can take anywhere from a few seconds to about a minute to lock in when changing channels Sometimes I get HDCP not supported, but that seems to have stopped. Make sure your TV is 1080i 1080p, otherwise I did not get sound on a 720p LG TV .

    I then hooked it up to a Toshiba 1080p TV and a Samsung 1080p TV. They both worked with sound & beautiful picture. I found some of my HDM cables did not work, but most did. Everything has to be right. Sometimes you need to connect & disconnect & recycle the power . it will work if you get a good one in the beginning, but its expensive. If you have no other choice because you want to utilize RG59 coax already in your house it’s ok. if you get lucky, it could work perfectly right out of the box – but I don’t understand why I get snow or slow connects of a few seconds to 30 seconds or so when I change channels… Hopefully that will improve.

    I am using a 2 ft and 4 ft HDMI cables at the receiver & transmitter with a RG59 coax run of about 75 foot.

    I’ll decide this weekend if I’ll keep these or not.

    • djsedm says:


      You’re right any HDMI distribution system is tricky to get working right due to the HDCP copy protection within the HDMI cable and spec.

      When everything works it works great – when it doesn’t – it’s awful.

      You’re right also these transmitter/receivers are EXPENSIVE and should only be used as a last resort, if you CAN run cable, (HDMI, COAX or Component) then you should do that instead and use this system ONLY when you can’t.

      HDMI with HDCP (High Definition Copy Protection) is sometimes slow to sync with any transmitter/receiver system and even sometimes when directly connected with a cable – go figure! Whenever possible in we try to still use Component Video when distribution HDTV to multiple TVs and HDMI only when COMPONENT VIDEO is not a viable solution. Component video is an analog cable and carries no copy protections, therefore FASTER switching and syncing time and NO Handshaking issues. Component video extenders and distribution systems are a lot less money also.

      There are other types of HDMI over COAX transmitters on the market including the ZeeVee Box which is an excellent alternative to this system and uses the Tuner inside your HDTV as the receiver. Becuase ZeeVee Boxes also transmit HDMI there can be slow syncing response depending on your equipment.

      Another alternative which is easy to set up is the HD Flow System from Peerless which transmits HDMI wirelessly. HD Flow is fast and easy to set up but since it’s wireless can be very temperamental on where the boxes are located, is subject to interference and has a slow refresh rate – motion blur. HD Flow is also an expensive solution.

      Overall there is no rock solid, reliable or easy solution for HDMI transmission. The HDMI spec was designed for single source to single display connection via HDMI cable up to 35ft. That means connecting a single blu-ray player or HD cable box to a single HDMI TV at a maximum distance of 35 ft, that’s the tech spec and anything farther than 35FT or more than one component connected through a switch or video transmission via balun, repeater, coax, cat5 or 6 or other means will result in less than consistent results and HIT or MISS problems. What’s worse is even with HARD WIRED HDMI Cable at more than 35 feet or running multiple sources through a single switch or receiver and cause syncing problems. HDMI is a headache for systems integrators and installers like myself as well as end users.

      I recommend whenever purchasing HDMI cables, components and baluns, splitters or switches that you purchase from a company with a good return policy so you can return the HDMI items if they don’t work.

      • Jerry J. says:

        HDMI longer than 6 meters typically will be directional. Be sure you are allowing for the correct signal flow direction. Most HDMI in that length and above will be labeled.

      • djsedm says:

        Can’t say I’ve ever seen an directional HDMI cable at any length. The HDMI spec requires the cable to be bi-directional so the monitor and source components can communicate with each other to display the correct resolution and frame rate.

        I’ve installed HDMI cable up to 100 feet in length and never had a directional labeling.

        No there is a component called an HDMI repeater or sometimes HDMI booster which is connected between to HDMI cables and is semi quasi directional. HDMI Repeaters have an input and output and need to be connected in a directional flow. The HDMI repeater is still bi-directional however some units use the 5VDC power carried within the HDMI source to power or Boost the HDMI signal to carry it further. HDMI repeaters must be connected with the input and output flowing from the source unit output to the display. It an HDMI repeater is connected wrong – it will not receive the 5V power from the HDMI source component and hence will not boost the HDMI signal.

  6. Jon says:

    djsedm, thanks for the reply & info. i just moved in this new place last week, but have owned it for a couple months. I been trying to get this intelix equipment to work for over a month. In my old house i had an 80 ft HDMI run, (2) 10 ft, and a 50ft run off a 1 in x 4 out HDMI swich. it worked great & was fast. i will soon try the cat6 HDMI extender with a pair of cat6 75 ft cables.

    thanks for the component/audio cable tip. i don’t see much difference in quality between HDMI & component. I may go that route to some rooms.

    I forgot to mention that with the intelix equiment that finally worked with my tivo premiere, As a test I also tried a 1080p LG blu ray player and got NO signal at all – that’s ok since I’m looking to distribute video from my tivo premiere and tivo HD DVRs.

  7. Nick says:

    This looks cool,but do Ineed the receiver end at all or can the coax go right into the atsc coax input on my flat screen? Kind of like how best buy sends out a hd feed to all their tvs at once.


    • djsedm says:

      With this system you need a receiver on each TV, there is another system called a ZeeVee box which uses the digital tuner inside the TV and does not require a receiver on each TV. The system used by Bestbuy and other electronics retailers as well as Sports Bars and Casinos etc … is not these type of distribution system rather a Component Video or HDMI distribution system which uses a small black box called a BALUN and Cat5 pr Cat 6 cabling along with a central distribution amplifier splitter, that type of system is entirely different.

      • Waldon Richardson says:

        please inform me how to obtain your hdmi to standard coax cable and price.

      • djsedm says:

        Sorry we only sell these locally, if you are in the Edmonton, Alberta Canada region feel free to call our office at 780-489-5522 otherwise do a Google search for a local retailer in your area.

        We recommend purchasing from an authorized retailer with a good return policy – that way if the units don’t work for you as intended you will be able to return them.

        Personally we only sell these units with installation – that way we can confirm the existing coaxial wiring and distribution is compatible with the repeaters/baluns.

  8. Jim says:

    If one of the Tvs in the daisy chain does not have HDMI can I view the transmission on the RG6 input of the older TV. I want to watch Apple TV over RG6 input on some of the TVs

    • djsedm says:

      There are a number of different ways to do what you are trying. If you’re not concerned about HD Resolution the least expensive and simplest way to do this is to use a Frequency agile RF modulator and an HDMI to composite video adapter on the apple TV then distribution STD def video over RG6.

      A second way is a ZEEVEE Box which would take a single HDMI feed and modulate it over RG6 to your TVs which then decode the signal using the built in digital tuner and presto distributed HD TV from Apple TV, or any other HD source.

      You could use the Intellix System to do this however it would mean installing an HDMI to component video converter at each non-hdmi TV.

      As a last resort and depending on your infrastructure there is a wireless HDMI transmission solution also but is very specific to your architecture and home design, build and layout. This does work in certain application but we only recommend it as a last resort.

      All these wired solutions are $2K + installation and are not simple DIY jobs. Further each solution and the BEST Solution depends heavily on your existing wiring, distribution, location of source equipment and several other factors which cannot be addressed in this forum via email or chat – you really need a hands on site assessment to recommend the BEST and Most Appropriate Solution. We do this all the time and have many of our homes running distributed APPLE TV. You should consult a competent systems integrator in your area and have him come down and provide you with a solution specific to your needs and wiring infrastructure.

  9. Allan B says:

    You keep referring to a ZeeVee unit doing HDMI over Coax! Which model is that, I only know of Component over Coax with ZeeVee…..


    • djsedm says:

      ZeeVee makes several different HDTV modulators which will transmit HDMI, Component Video, DVI or VGA over coax cable to TVs, monitors and displays with QAM Digital tuner. You can read my review of the ZVBox 180 at the following link: . ZeeVee makes a complete line of ZV Boxes and there newest product is the HDBridge 2000. Yet to be reviewed.

      ZeeVee Boxes and Bridges are far more reliable and usually a more cost effective solution for HDTV transmission over coax than most peer to peer repeater/transmitter products.

      HDMI over Coax isn’t really a DIY project. While these solutions seem simple, they are dependent on the design of your current coaxial cable network or distribution as well as the type and quality of coaxial cable being used and in some cases the length of the coax cable.

      Many consumers are looking for a simple Plug N Play solution for HDMI over Coax Distribution. While ZeeVee boxes and other do work, and often provide incredible results to impossible problems they are far from Plug N Play or DIY installation. Due to all the complexities and variables with HDMI and HDTV transmission you should seek the assistance of an experienced systems integrator to determine which solution is Right and WILL WORK with the existing coax wiring in your home.

      • Allan B says:

        I have installed over 300 of the ZeeVee range, mostly the HDBridge 620 and ZeeVee 170’s however I’m not aware of any ZeeVee unit that will accept HDMI or DVi.

        I was hoping that a new model had appeared that I was not aware of but this does not appear to be the case.

        So in short, can you tell me which model accepts HDMI or DVi because I am not aware of one.

      • djsedm says:

        Hi Alan,

        You’re absolutely right ZeeVee does not make a box that natively takes HDMI or DVI as native input, only VGA and Component Video.

        We use DAC – digital to analog HDMI converters to first convert the HDMI to Component Video or VGA and then Transmit the HDMI or DVI, HDTV signal through the customers home via the existing coax cable. I’m sure you probably are doing the same with some of your ZeeVee Box installation.

        Our customers and many of our readers are not concerned with the intricacies of exactly how it works but the fact that there is a Workable Solution to transmit HDTV on existing coax rather than running new cat5/6 or HDMI cabling to each TV.

        I hope this clarifies that you indeed are right in your understanding of the ZV Box, in fact with more than 300 installed units, you’re more of an expert on ZeeVee than I, my experience is numbering around 70 ZV installs.

        Thanks for your input.

      • Allan B says:

        Thank You for clearing that up.

        I will be doing 2 more multiple ZeeVee instals in the next 2 weeks, never had to use a DAC, my source has always had Component.

        Thanks again.

      • djsedm says:

        Good luck with your installs Alan.

        We’ve used DAC’s several times to connect Apple TV’s and other HDMI or DVI source components to ZeeVee Boxes, they work great.

  10. waba says:

    This stuff is crazy. The Monoprice $18 HDMI over 2 CAT5 sender and receiver pair works great. I use them – 2 pairs on different areas of my home. They work great. Great picture and sound and no HDCP or handshaking issues at all.

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