Most of the guys on the McIntosh forum that have the MC275 use the Genelex Gold Lion tubes. They claim their is no better tube than that. I tried the Gold Lion 12ax7 tubes in my McIntosh C2500 preamp and did not care for the presentation. I am back to the factory JJ tubes (McIntosh branded).
Gold lion tubes
Hello in going to run mc275 as mono blocks the one has groove tubes the other orange bottom gold loins. I know I have to have both the same .why are some gold Lions red label and other orange? Thanks scooter