Subwoofer and OTA Antenna signal on the same Coax? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 13 Old 01-14-2020, 01:15 PM - Thread Starter
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Subwoofer and OTA Antenna signal on the same Coax?

Hi - I have a coax running from media closet to media room, which is currently connected to one of my subwoofers. Can I combine and then split the same existing coax to sent ANT (UHF/VHF) and SUB on the same coax? Running a new coax inside the walls is not an option for me.

In theory, it sounds fine to me...but wondering if anyone has actually done it. UHF/VHF uses high frequency and SUB uses lower frequency..... but want to get input from someone who may have gone this route before.


Thanks.
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post #2 of 13 Old 01-14-2020, 01:47 PM
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Doesn't sound like a good idea.



If you can’t explain it simply, you don’t understand it well enough – Albert Einstein
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post #3 of 13 Old 01-14-2020, 01:51 PM
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What an interesting question. Assuming it is RG6 or RG59 I think it would work with a switch but with a combiner there could be issues because the impedance the various devices are expecting to "see" is altered.

In A/V reproduction accuracy, there IS no concept of "accounting for personal taste/preference". As art consumers we don't "pick" the level of bass, nor the tint/brightness of a scene's sky, any more than we pick the ending of a novel or Mona Lisa's type of smile. "High fidelity" means "high truthfulness", faithful to the original artist's intent: an unmodified, neutral, accurate copy of the original master, ideally being exact and with no discernable alterations, aka "transparency".
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post #4 of 13 Old 01-14-2020, 02:29 PM
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Quote:
Originally Posted by m. zillch View Post
What an interesting question. Assuming it is RG6 or RG59 I think it would work with a switch but with a combiner there could be issues because the impedance the various devices are expecting to "see" is altered.
Perhaps as long as you have no need to use the antenna and subwoofer at the same time.



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post #5 of 13 Old 01-14-2020, 03:19 PM
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Doesn't sound like a good idea.
It looks like you missed a great teaching moment.

Why doesn't it sound like a good idea?
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post #6 of 13 Old 01-14-2020, 03:20 PM - Thread Starter
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Thank you for input...yes it is RG6 cable... I will try it just to see what comes out as final result:-)

Just waiting on F type connectors from amazon...and my delivery is overdue by 4 days. I will post results here, when I try it..

Thx again.
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post #7 of 13 Old 01-14-2020, 04:04 PM
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Quote:
Originally Posted by DerbyDad03 View Post
It looks like you missed a great teaching moment.

Why doesn't it sound like a good idea?
Well....


The antenna is a passive device that connects to the TV.

The receiver and the sub are active devices.
The voltages from the devices will interfere.



Now! If the antenna is amplified, that's even a bigger a problem for ALL devices.



Be forewarned. Lesson learned (or soon to be). There's a difference between teaching and common sense.



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Last edited by Ratman; 01-14-2020 at 04:07 PM.
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post #8 of 13 Old 01-14-2020, 04:26 PM - Thread Starter
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But remember different frequencies...VHF is high...Sub is low...I guess will have to test and find out.
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post #9 of 13 Old 01-14-2020, 04:29 PM - Thread Starter
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Will test it on my cheapo sub I purchased on craigslist, and not my hi end one.... just to be risk avert.
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post #10 of 13 Old 01-14-2020, 04:39 PM
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The safest bet is to just use your coax as an antenna signal wire and buy a wireless subwoofer/transmitter receiver kit for the sub. They were around $80 last time I checked.

This sort of thing
, (assuming the range works for you), not that I have used this one so I can't endorse it specifically; I'm just giving an example of what's out there. [Some may cost even less.]

Last edited by m. zillch; 01-14-2020 at 04:42 PM.
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post #11 of 13 Old 01-14-2020, 04:39 PM
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Quote:
Originally Posted by Shoaib Chaudhry View Post
But remember different frequencies...VHF is high...Sub is low...I guess will have to test and find out.
But be aware. Voltages from the active devices could not only interfere with the OTA signals (no matter the "frequencies") but also potentially harm the TV.
Have fun with this teaching moment.



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post #12 of 13 Old 01-14-2020, 04:42 PM
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Quote:
Originally Posted by m. zillch View Post
The safest bet is to just use your coax as an antenna signal wire and buy a wireless subwoofer transmitter receiver kit for the sub.
Or... split the other subwoofer's feed to share between the two and use the other coax dedicated to the antenna/TV.



If you can’t explain it simply, you don’t understand it well enough – Albert Einstein
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post #13 of 13 Old 01-14-2020, 05:08 PM
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Don't forget, the antenna sends millivolts to antenna input. Sub can send voltages as high as 10V. Is that acceptable input voltage to that antenna circuit?
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