I just sold my mc2500. I purchased it in 1987 new. I never even burned out a light in the amp. I kept it in a cabinet. so it stayed clean. A great amp, never let me down. It also had a surprisingly high resale value. Prior to selling the amp, I asked my McIntosh dealer if it was necessary to service the amp. He told me no, that he had seen these amps run longer than this without problems. One note, I was probably in the the lower 8 hours per week range. My new amps are mc601's, love them. I also told my son these would be his one day (I'm 63). He promptly ask me, "how are you feeling?" I know you will always love the 602 until you have to move it.