This is a first model that was chrome plated one as McIntosh. output tubes are 1614. Later model mounts 6L6G. Direct coupled/cathode follower driver circuit. This circuit construction was adopted McIntosh amps. C-108 was improvement a little so C-8 was born in 1955. It has 10000 pattern of equalizing curves. This amp produces an atmosphere of good time. Nipponbashi shop Kenji Masuzawa