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Why does my speaker lose sound randomly but will still be connected? I replaced the speaker thinking it was faulty. New was on for about 2 hours then went silent. I had to forget, reset the box and reconnect. This happens on both my boxes and with 2 different brands of speaker. Although my older "Anker" speaker seems to go longer before going silent.
What do you have your audio output settings set to? If Dolby, try Expert mode.
Just a reminder, Bluetooth uses 2.4 ghz, the same is the primary band of WiFi routers, as well as Microwave ovens, game controllers, rc toys, many baby monitors, older cordless phones, cordless keyboards and mice, some garage door openers, and more. There are a LOT of things that could put noise on the 2.4 ghz spectrum and cause the speakers to go haywire. If the main speaker setup is close enough to the tv, I would see if I could hook it up via spdif.
I should add that before I had the 4k contour receivers, I had the mini contour boxes and used a Bluetooth adapter on my TV's and never had a problem. I haven't seen a setting for audio output but will look in settings again. The reason I didn't just stay with the adapters was less wires hanging down, no flashing blue light when TV is off and the micro second delay got distracting sometimes.
If you have Optical, (SPDIF), that's the best way to go, really. I have a SAMSUNG HWQ60T, and I can hear a difference between bluetooth connection and spdif/optical
Does your TV have Bluetooth? The wireless box sends both audio and video to the TV, so perhaps your TV can extract the audio and transmit to the speaker.