The sideburns are diecast aluminium, as in the CD-95 or PM-95, for a 26,5 kg total of educated high-fidelity. The PM-99SE, introduced after the PM-88SE, is the Special Edition of the PM-90 and rests on a copper-plated zinc diecast base and is powered by one bigga toroidal trafo producing clean but hot Class A music (the unused portion of which heats up a 3 mm aluminium top plate) or more efficient but very ample Class AB power.
Part of the Philips/Marantz high-time (sound-wise and sales-wise), the PM-90 is the top echelon of a constantly upgraded and plethoric lineup which included the PM-80, PM-80a, PM-80aF, PM-88SE, PM-88aSE, PM-95 and PM-90 - plus a few more export-only variants !