I've left my modified Adcom on for 15+ years and I've heard no deteriation in the sound.As someone said the design and how well you take care of your equipment comes into play. I also feel that providing your SS equipment with purified electricity provided by a good AC line conditioner and good power chords can't hurt.
Can the sound of SS amp deteriorate over time??
Would like to know if the quality of the sound of a "high- end" solid state amp can deteriorate over a period of 10-15 years. That is, the the bass sounds less tight and controlled, the sound is less clean and clear and imaging is less focused and precise. I realize that a tube pre-amp or power amp are subject to this deterioration in sound depending on the quality and condition of the tubes.... Need some technical advice