ARC D-115 use half of tubes

I used to own a Classic 60 before I owned my D70Mk2. IMO, the Classic 60 is not in the same league as the D70Mk2. While the Classic 60 is a good amp, I don't think it has anywhere near the midrange purity or the ability to float the soundstage like the D70Mk2. OTOH, the Classic 60 is easier in some ways to get running optimally, plus it is less demanding on the quality of the tube. Lostbears, unfortunately I strongly suspect that you never truly heard what your D70 could sound like.

Use all the tubes in your D70mk2.

Hifigeek1, I think the OP is talking about a D115. However, the same advice would apply.

Same goes for the D115....