restorer-john
Grand Contributor
Just want to note that we don't know if we need to "prolong the life of the amp". There's no indication that there is a real life problem.
There is plenty of anecdotal evidence on failed Hypex SMPSs out there:
(a really quick search)
http://www.notanon.com/audio/dead-hypex-smps600-v3-power-supplies/2015/05/02/
https://www.diyaudio.com/forums/class-d/165033-hypex-smps-help-lack.html
https://www.diyaudio.com/forums/power-supplies/316309-hypex-smps1200-faulty-capacitor.html
http://electronicprojectsbuilder.blogspot.com/2015/02/hypex-smps400-power-supply-repair.html