by old school im guessing u mean old usa series, if not i have a bnib md 22 05 - 06 merlin series with warrenty through a shop in tennessee i believe. i installed to make sure it works. and it a beautiful amp. manual says 200 x 2 @ 4, 300 x 2 @ 3, 650+ x 1 @ 4 ohms bridged, but the cea ratings are 250 x 2 @ 4, 357 x 2 @ 2, and no bridged rating but i hear 700 - 720 x 1 @ 4.
It basically bnib. beautiful and also no noise for me when i was using it for a day.
LMK.
Mike-
Looking for 250 shipped