Modernized version of the 1978 E-303 original : exit the assymetrical internal layout : exit the rather lengthy cabling and exit some of the push-buttons.
The power MOS-FET transistors were maintained but power output increased : the original two TO-3 pairs per channel were augmented to triple-push-pull ! Much bigger speaker terminals and the addition of a second line level input.
High-class, high quality, high durability.
The circuit refinements you can read all about in detail at Accuphase's own website.