The unit has a built-in amplifier, the gain can be adjusted separately for each microphone from the front. The unit has two 6.3 mm mono jack sockets on the back. The cable must therefore have two 6.3 mm mono jack plugs on one side and those of the TV on the other side (e.g. cinch or 3.5 mm jack). You can connect it to a TV if it has corresponding audio inputs (aux). If the TV only has HDMI, there are also audio adapters HDMI-CINCH.