Dungn, in Robert Levi review, this is how to run them in mono.
"The stereo 890 becomes a monoblock with the click of two outboard switches and the connection of an external strap, which should be a 24-inch length of speaker wire identical to your normal speaker cables. There is no need for further adjustment."
I think you should contact ear-usa for CLEAR instructions.
"The stereo 890 becomes a monoblock with the click of two outboard switches and the connection of an external strap, which should be a 24-inch length of speaker wire identical to your normal speaker cables. There is no need for further adjustment."
I think you should contact ear-usa for CLEAR instructions.