It also depends on when it was made. If it was in the 1950s or 60s them of course more tubes because that’s the technology of the day. My McIntosh Mx110z has 17 tubes but it’s a pre, phono and tuner and was made circa 1960. My more recent C2300 has 6, 2 for MM phono, 2 for MC phono and 2 for Aux. Same for amps where my MC30s have tube rectifiers instead of ss, They have one more tube per channel than my MC240. Technology.
Tube Preamp: How many tubes does it take to .................
My McIntosh Tube Tuner/Preamp has 17 tubes (some for tuner of course).
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This EAR 802 Tube Preamp has 14 tubes (and either MM or MC phono)
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Some have as few as 2 and no mention of Hybrid
Some call themselves Hybrid
What _____________________________?