" at the same time"
And when you blow it up from running two pair of 4Ω speakers at the same time I will sell you my 9090 for parts.
I do not believe I have any 4 ohm speakers. But I do agree that it is best to consult the owners manual 1st. Now where did I put it? I know I did not toss it out.
I have enough amps and recievers that I have not run 2 pair off of them except for the Marantz 4270, and have never had an issue with it. In fact I like it better then the surround sound. Just SHMBO and my opinions.
You got a 9090 for parts? Is the selector switch good and does the lights work? Maybe we should talk. Mine is working fine now, but who knows what the future will bring?
Some times I am as Happy as a Frog on a Lilly Pad.
Other times I feel as though I have Just Been Gigged