Where a PA5 has failed, is it a consistent left-channel issue?
Serial number #2201, not a problem at the moment.
dunno if it is consistent, but the reports i've read in the other thread were either left or both channels. mine is currently left channel only
for reference, it was always plugged in, used only the front switch to turn it "off" overnight. it has very very rarely played over 25% volume. it was fed a balanced signal from Topping's own E50 connected by Topping's own TRS 25cm interconnects. up until today, it was always connected on In2 (as it is neater for the interconnect on the e50, stacked below the PA5). it was powering a pair of KEF R7s (88db sensitivity, 8ohm nominal, 3.2 minimum). it was often warm (nearly always), but never uncomfortably so (eyeballing, in the 35-40C range)
i wonder if it might be related to speaker loads? according to KEF's specs, the R7s is under 4ohm between cca 75-250Hz, maybe that's too much for the PA5? it shouldn't as specs would indicate otherwise, as it's rated down to 2ohms. dunno, just thinking out loud
what are or were you guys/gals powering with it?