The Dynakit stereo 120 was the first solid state amp that I owned, replacing a 40wpc Eico tube job.
The ST120 circuit was very different from just about every other transistorized amplifier (including later Dynaco units) in that it did not have a complementary transistor output stage, but rather the output was coupled through an enormous electrolytic capacitor. The circuit has been described as a preamp on steroids.
The later Dynaco Stereo 150 had a more conventional circuit and was touted as a big upgrade. Many bad things were said about the ST 120. Specwise this was true, but I always found the ST 150 less satisfacory overall. Lately the reputation of the ST 120 has been rehabilitated.
The ST120 circuit was very different from just about every other transistorized amplifier (including later Dynaco units) in that it did not have a complementary transistor output stage, but rather the output was coupled through an enormous electrolytic capacitor. The circuit has been described as a preamp on steroids.
The later Dynaco Stereo 150 had a more conventional circuit and was touted as a big upgrade. Many bad things were said about the ST 120. Specwise this was true, but I always found the ST 150 less satisfacory overall. Lately the reputation of the ST 120 has been rehabilitated.