Both monos are basically finished now and the first "Burn-In" is also done. The F1 is Class-A amplifier, so no wonder, it is getting hot. I would estimate that the heat-sinks reach 60°C after one hour.

The first sonic results: The F1 doesn't hurt, it is performing quiet smoothly.

There is definitely an improvement in the bass, never did get such a deep and dry bass out of my Cantare Little Wonders before.