Built one of those many many years ago along with an ST-150 power amp. The PAT-4 was Dynacos first foray into solid state preamps and as such it lacked refinement that the later released PAT-5 had. The PAT-4 initially received some good reviews as is sounded so different from its tubed predecessor. Alas, in time different was not better. There was an edge and lack of dimensionality.
I still remember soldering all those caps to the high cut filter assembly--arrrgh! But maybe I understand why they included it now.
I still remember soldering all those caps to the high cut filter assembly--arrrgh! But maybe I understand why they included it now.