AP4 70 Watts/Channel Class A
There was one last Lecson power amplifier, the AP4. This was a massive Class A monobloc with a Class A output of 70 watts and a much higher output in Class AB. Think of it as a Krell before its time. This was a fantastic amplifier and at one time I had six of them in a tri-amped active crossover system.
They could drive anything (+/- 90 amps peak current rating) and, if my memory serves me well the full power output (not all Class A) was over 150 watts into 8 ohms and over 250 watts into 4 ohms. They sounded smooth and transparent.
Two are known to currently exist and have recently undergone restoration. According to their owner, they “are amongst the best amps I have ever listened to and in a different league to the AP3 mkII. They promised so much and delivered much more.