"7800" amp isn't a unique term. Who makes it? An amp with male plugs, really? Most audio devices and amps have female RCA inputs connected by male cables.
All that alphabet soup for the TV gets bupkus, too. YOURS is the only hit on Google.
Go to http://www.p4c.philips.com/files/ and drill down to find the manual for your TV and see what it recommends for audio connection to an amp. Be patient, the initial alpha directories are slow to load.
If the TV programming originates with a Cable Box, use IT as the audio source. TV -audio is usually minimalist.
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