Some users report the stock tubes sound as good as anything. The MC275 is not dependent on exotic tubes for good sound. Many other factors effect the sound in a system. Ron-C
You're right, Ron-C. The IV is not dependent on exotic tubes for "good" sound. However, some NOS tubes could make it better, depending on sound preference. I have used gold pin Sylvania 5751 and 6201 with excellent results, better than stock. I personally would not change the stock KT88's.
I have owned for about 3 months and it is a terrific amplifier, I own other mac gear as well as some other tube abd ss gear, this amp sing especially with high quality small speakers...it just makes them sound soooo good...a relative bargain in the hi end world...quiet as a mouse....I am using it with the stock tubes,,,beautifully made too.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.