Amplifier Current out at max CDi 1000, 2000, 4000

Mearle

I need to know the max current (I) levels at the 2,4, & 8 ohm levels for the Crown CDi 1000, 2000 & 4000 amps (per Channel or bridged) Or the correct formula to use. I am skeptical about using the formula as the impedance will vary, and I just want to design for the worst case(s).

I am wanting to build a 2 amplifier in 1 speaker out "Amplifier Relay switch" I know the Max power of the Crowns, but I am not sure of the current level I need to use for the relay, I would like to account for either 2, 4 or 8 ohm modes so I realize that the current may vary for each mode.

If anyone is curious about the application, it is to be able to switch between R/L Audio and 7.1 modes, the reasoning is that I dont have "line outs" for some of the signals from the receiver so I need to switch between the Crown power for pure audio and "some" of the receiver speaker outputs....