You will need a decoder like this one http/www.amazon.com/Panlong-Audio-Digital-Decoder-Converter/dp/B00AMC2J1Y
Optical out of the TV (set to surround sound) connects to it and your mini plugs connect your speakers to it.
The optical out is fixed (TV volume will not change it) so you speakers will need their own volume control.
You will need a decoder like this one http/www.amazon.com/Panlong-Audio-Digital-Decoder-Converter/dp/B00AMC2J1Y
Optical out of the TV (set to surround sound) connects to it and your mini plugs connect your speakers to it.
The optical out is fixed (TV volume will not change it) so you speakers will need their own volume control.