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Question
Follow-up to your last answer...
I have switched ch when echoing on Fox ch. echo always stops, and upon return to Fox ch, echo usually is gone until next broadcast commercial. I have seen echo remain when returning to Fox, but usually it is gone until next commercial broadcast.
I have experimented with using only tv speakers. I have never observed echo using only tv speakers.

I think I need to swap in a different tv and see if fault is present. This will isolate whether issue is tv or receiver.
Are you aware of an audio filter or processing unit I can connect to address the issue?

Answer
Question: Is it possible the echo is coming from the internal speakers and the external speakers being ON at the same time?  Can you listen close to see if that is so?

Trying another tv is a good suggestion.

Also, as an after thought, why not go into the menu and make sure the internal speakers are switched OFF.  Maybe reset the tv to verify the settings.

I think you are making progress.  You should be a system installer and troubleshooter!  

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Cleggsan

Expertise

Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.

Experience

Have been associated with audio design, standards, testing and component systems for over 40 years.

Organizations
Life Fellow Member of Audio Engineering Society Life Senior Member of Institute of Electronic and Electrical Engineers

Publications
Review technical manuscripts for IEEE Spectrum Write occasionally for high-end audio publications

Education/Credentials
BSEE/MSCS/MBA

Past/Present Clients
Past Employee/advisor to several well known audio products manufacturers

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