Harman/Kardon PM640

Nothing fancy and a build-quality which one could easily call industrial.

However - this little thing was my first "serious" amplifier after I junked my "old" Pioneer SX-1000 (we all make mistakes). Of course, I didn't know then that this was built by Shin Shirasuna and I had only a faint idea of what an MC cartridge was.
And it lived for nearly 15 years, powering many
l o u d parties at insane volume levels, with the loudness switch pushed in and the treble control set at the maximum. Without ever a hickup : getting just barely warm at delivering the goods.

HCC (High Current Capacity) was at the center of it - mostly a huge transformer which felt like it made at least 70% of the PM640's total weight !
That series boasted HCC, low-TIM, low NFB and a very wide bandwidth.
I hadn't enough money to purchase the PM660 topper so I went instead for the little PM640 and put the difference into a better source : Denon DR-M4. I was an audiophile without knowing it ;-)

I was sad to have to part with this little beast as it made so many of my parties that loud and for so long.