I personally preferred the sound of a Nakamichi PA5 power amp over the Adcom 555 or even the Adcom 565, jmo.
Nak PA5, (Threshold , Nelson Pass design)
http://1.bp.blogspot.com/-UMTedZvEopE/TXVSaj6vjYI/AAAAAAAADGc/UvMt8hkvZ-A/s1600/top%2Bcover%2Boff.jp...
(Photo from Net)
Nakamichi cassette decks were considered top tier back in the late 1970s and 1980s.
Nak PA5, (Threshold , Nelson Pass design)
http://1.bp.blogspot.com/-UMTedZvEopE/TXVSaj6vjYI/AAAAAAAADGc/UvMt8hkvZ-A/s1600/top%2Bcover%2Boff.jp...
(Photo from Net)
Nakamichi cassette decks were considered top tier back in the late 1970s and 1980s.