Acurus A150 amps into 4ohms?

I have an old Acurus A150 amp which sounds like new. How many amps would it be into 4 ohms? Thinking about buying Magnepan.7 or 1.7i’s.
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Page 2 of the 2 page manuel.

150 watts per channel @ 8 ohms
200 watts per channel @ 4 ohms

I didn't look up the amps pulled at start up or while running.