The Galaxy Audio RCA Combiner is a great device that takes two stereo CD or tape players and combines them into a single mono output (either XLR or 1/4 inch). This not only frees up mixer channels but also comes with a phantom block on the XLR to stop phantom power from reaching the CD/tape players connected to the RCA jacks. It's made of metal, with dimensions of 5' x 2.5' x 1.75' (127mm x 63.5mm x 44.45mm) and weighs less than 3/4 lbs.

Using the Galaxy Audio RCA Combiner is easy. First, connect your two stereo CD or tape players to the RCA jacks. Then, you'll get a single mono output through either the XLR or 1/4 - inch output. When using it, make sure the devices are turned off before connecting or disconnecting to avoid any electrical issues. Also, don't expose the combiner to extreme temperatures or moisture. For maintenance, simply wipe it with a dry cloth regularly to keep it clean. If you notice any problems, check the connections first before seeking further assistance.