There’s a Luxman tech in the U.S. you can call for the advice you’re needing. I spoke to someone named Jeff at Luxman’s Technical Assistance number, 781-608-1044, on the same subject a couple of years ago.
At the time I was constructing built-in cabinets for my equipment and needed to know how much open space to provide around a Luxman L-507uX Mk2 integrated amp. Not a Class A, but still ended up requiring a substantial amount of space over, to the sides, and behind it. Approximating his recommendations I now have 11-1/2 inches of space on either side of the amp, 6-1/2 inches of free space above it and the same 6-1/2 inches behind it. That’s worked out well, so I’m guessing he could accurately provide you the advice you need for a 590AXII.
Mike
At the time I was constructing built-in cabinets for my equipment and needed to know how much open space to provide around a Luxman L-507uX Mk2 integrated amp. Not a Class A, but still ended up requiring a substantial amount of space over, to the sides, and behind it. Approximating his recommendations I now have 11-1/2 inches of space on either side of the amp, 6-1/2 inches of free space above it and the same 6-1/2 inches behind it. That’s worked out well, so I’m guessing he could accurately provide you the advice you need for a 590AXII.
Mike