I'm not sure about longevity but I assume they last as long as other gear. They have an outstanding service department.
How reliable is PS audio equipment?
I know PS audio equipment gets wonderful reviews, however, how reliable are they?
I hear on other sites that owners constantly complain about sending their equipment back for repairs.
Also, I recently heard from PS audio that their BHK preamp is only good for 20 years due to the design.
Anyone have any opinion on this?