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Rca to optical quality and advice? 5.1

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Old 07-12-2017, 12:49 AM   #1
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Default Rca to optical quality and advice? 5.1

Hello

I have an old 5.1 surround sound. The inputs use 6 rca cables but obviously the tv doesnt accommodate this. I read using a jack will only give 2.1 so only other option i can see is optical.

1) will it work hooking 6 rca leads into an optical adapter plug then feeding i to tv?

2) will the quality be really bad?

3) any other options?

Thanks again
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Last edited by Blagooba; 07-12-2017 at 12:53 AM..
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Old 07-12-2017, 06:37 AM   #2
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I think you have the signal flow backwards. It seems that your surround system has 6 RCA connections for inputs and your TV has an optical output for 5.1 surround. So the optical would go into the converter and out to the surround system. You feed the surround system, not the TV.

From the look of the surround system in the photo I can't tell if this is going to work anyway. It would appear it is intended to work with another box that has the input selection and volume controls. If so, then a converter will not work because the TV optical output is a constant level, it is not controlled by the TV volume. They intend it to attach to a surround system that has a volume control or to a sound bar which is mated with the TV.

Most TVs will only output 5.1 audio out the optical when the internal tuner is being used. When other inputs like the HDMI inputs are selected by the TV, only 2.0 stereo will be output. Thus, in order to get 5.1 surround from a cable box, satellite box, fireTV, etc you need to connect a surround system that has HDMI inputs and outputs and run the signals through the surround system.

If you supply the TV and surround brands and models, further help may be available as well as the source for your programming.
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Old 07-12-2017, 11:32 AM   #3
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Hi thanks for the detailed info yeh sorry got muddled. Obviously the tv feeds into the sub which is then linked to the other speakers.

The sub and 5 speakers play off a two rca cable (into sub any of the sub inpit holes) to jack (into phone or tv).

The sub has a volume wheel that affects the other speakers at the same time but this seems to work independently from the volume toggle on the tv or phone which also contribute to the "maximum" volume.

Not gunna lie I was trying to avoid being honest and admittong i have an old asda's own brand surround sound (technika 5.1ch home cinema kit, HCHKAW08)

two potential tvs 1) samsung le40b551 2) samsung t32e310ex

Thanks again for any advice.

Last edited by Blagooba; 07-12-2017 at 11:54 AM..
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Old 07-12-2017, 12:06 PM   #4
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I don't know what you would need to use that surround system. They do make an optical to 6 RCA converter that may work if that system has its own volume control.

https://www.ebay.com/i/291115744078?chn=ps&dispItem=1
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Old 07-12-2017, 12:45 PM   #5
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That was really my key question. Would it work and does this route adversly affect sound? Obviously the unit isnt a premium speaker but i think it sounds okay for casual film etc via jack but it isnt 5.1 surround
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Old 07-12-2017, 03:45 PM   #6
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If it has enough bass response to suit you, your money would be better spent buying a low cost 5.1 system and using the subwoofer you have as a second bass speaker. Like this refurbished one from amazon: https://www.amazon.com/LG-Electronic...theater+system
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