I only had 1 headphone set on and paired at a time, with all other Bluetooth devices off as well to make sure it wasn’t due to the mixing of signals

I have this hooked up as a transmitter to an Onkyo receiver and a Oontz Angle 3 Ultra portable Bluetooth speaker

See my review of the Miccus Home RTX the most reliable long-range Bluetooth transmitter.

My Miccus RTX2.0 Bluetooth Reciver/Transmitter works a lot better with the add-on

that I have some great Bluetooth headphones that would only be usable if I were willing to have a mismatch between sound and video

Nice Long Range Bluetooth

There isn't anything that I know of in Australia that boosts Bluetooth

Mucus makes a great Bluetooth extender.

I could not get it to work using Bluetooth, so I contacted the Miccus Support Group for help.

Portable Bluetooth Speaker - Exceptional Bass and Rich Stereo Sound, Plays Loud, 14-Watts, 100ft Wireless Range, Play 2 together for Music in Dual Stereo, Splashproof Black