TonyL wrote:
I built a nice +- 25 V power supply, made an enclosure. Mounted the
HY60s. Then found that one of them was faulty when I powered them up
:-(

Just a FYI after all of the "discussions" in here regarding power supplies
etc. for my proposed "junk box" project.

Found a replacement HY60 and finished the unit. I haven't put anything with
a 100% duty cycle through it but have tried some heavily compressed
drum&bass at frightening window rattling levels for longish periods. The
regulator bypass transistors run slightly warmish while the HY60s with their
hefty heatsinks hardly heat up at all.

Sound quality is excellent. Thanks for all of your helpful comments in the
original thread.

TonyL