The McLELLAND SS-27R & SS-27RW speaker selectors are designed for handling high power signals up to 2500W per channel (SS-27RW for 400W per channel).
These two items both can be used to connect either 2 power amplifiers, 7 pairs of speakers or 7 power amplifiers and 2 pairs of speakers with the IR remote control, you can easily select the input signals and output channels. They also allow link two units working together to expand to a 14 channels output system.