Basic Black, full 17" wide and fairly hefty. I haven't been inside but theres a big bolt head on the bottom which says toroid power trans to me.
Classe doesn't have any info on their site and no one at that other site can agree whether it's a true balanced circuit but at least the XLRs are there.
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Class-A is the pronunciation, I guess, but class AB is the circuit. I let it cook all night and it didn't even get warm. Just what's needed.