I have a MC240 that was used for about 30 years on a routine basis. It never even went to the Mc Clinics and still was running without a hitch. Then it sat for 10 years before I got it. I powered it up with a variac and used it for 3 months without ever doing anything to it! Then I gave it a full rebuild but only because it is now 40 years old! I'd say you could expect the same of a MC275 - and it sounds fantastic IMO. The 275 runs warm but not hot (better for durability). As Jaybo says, it is a legend and there are very good reasons why that's the case.
I had a BAT VK-3i that I liked quite a bit sound-wise but it had issues too. The volume control would send a clicking sound through the speakers when rotating it. Faint but there. Also, there was crosstalk if the unused RCA inputs weren't shorted. I contacted BAT about it but was basically told these things were normal!? I sold it soon thereafter. My McIntosh C42 replaced it, which has been a blessing in all aspects - no wierd noises, zero crosstalk, and the best sound I have had from a preamp (and I've had many).
Arthur
I had a BAT VK-3i that I liked quite a bit sound-wise but it had issues too. The volume control would send a clicking sound through the speakers when rotating it. Faint but there. Also, there was crosstalk if the unused RCA inputs weren't shorted. I contacted BAT about it but was basically told these things were normal!? I sold it soon thereafter. My McIntosh C42 replaced it, which has been a blessing in all aspects - no wierd noises, zero crosstalk, and the best sound I have had from a preamp (and I've had many).
Arthur