I stick with stereo. No multi-channel nonsense. I like to keep things relatively simple (considering the possibilities).
1972: Dynaco SCA80Q integrated amp (kit, not a good start)
1973: Marantz 1060 integrated amp (much better)
1973: Marantz 240 pwr amp w/ Dynaco PAT-5 pre
1974: Marantz 240 pwr amp w/ Marantz 7T pre
1975: Marantz 240 pwr amp w/ DB System DB1a pre
1976: 2 Dynaco ST70 modified tube monoblocks w/ DB Sys. pre
1977: Julius Futterman H3aa monoblocks w/ DB Systems pre
1980: Modified Dyna ST70 (6SN7 input section) w/ DB Sys. pre
1983: 2 McIntosh MC40 tube amps w/ ARC SP6B tube pre
1983: Also Bedini 25/25 class A transistor amp, secondary
1985: Julius Futterman tube monoblocks w/ ARC SP6B tube pre
1986: Julius Futterman monoblocks w/ NYAL NCP-2 tube pre
1990: NYAL NCP-2 tube pre into powered Meridian M20 speakers
1994: NYAL NCP-2 tube pre into powered B&O 8000 speakers
1997: Golden Tube SE100 tube amp w/ N.E.W. P3 tube pre
1999: Luxman 3045B tube monoblocks w/ NEW P3 tube pre
1999: Also Acoustic Masterpiece M-101 SE KT88 amp
2002: Audion Silver Night 300B integrated amp for music
2002: Audion Sterling KT88 ETSE integrated amp (for rock)
2005: 2 Audion Black Shadow 845 tube monoblocks w/ Audion Premier 1.0 tube preamp.
2005: Also A/V system uses 2 Audiopax 88 tube monoblocks w/ Django TVC (Transformer Volume Control) using the 6db gain option.
Notes: After a 30 year tour of duty in my brother's systems, my original Marantz 240 is back in my hands. Since 1997 using linestages, my phono preamps have been:
1998: EAR MC3 transformer + Wright Wpp tube RIAA section
2001: Bel Canto Phono-1
2004: Audion Premier phono preamp
This year I returned to a full-function preamp, the Audion Premier 1.0 for line and phono, with Blackhead transformer.