How to connect a speaker system to a television?
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The best option is to connect using an HDMI cable via the corresponding HDMI ARC/eARC ports on the television and amplifier/processor. In the television settings, enable HDMI ARC and CEC (if necessary).
Alternative options include connecting via SPDIF, which is usually available as Toslink (optical) or RCA (coaxial) ports on your TV and amplifier/processor.