Originally Posted By: tfabris

- Outside the TV, the four speaker wires connect to the speaker input terminals on this Russound ADP 1.2 device.

The page linked from the question which that is an answer to says:
Quote:
The circuit is designed to work with typical HIFI amplifiers where negative speaker connector (black) is connected to amplifier ground. Be careful here because some modern amps have both terminals actively driven. Connecting either one to a common reference could cause the output stage to smoke.

Your TV has a "both terminals actively driven" type of amplifier.

This page suggests that your adaptor could still work, so long as you can somehow get hold of a connection to the amplifier's ground. Use that connection as ground plus one of each side's speaker wires, instead of both of each side's speaker wires (neither of which is ground). You could add solder bridges across the grounds you've cut on your convertor.

Peter