@Samuel Jayaraj @Tubelab_com @jam Last night and tonight I tested the KSC1845 in the gain position. It settled in immediately at about 10 mA and 60 Vd. It is quite good at low volumes but on crescendos, it doesn't do well. At 10 mA and about 40V across the device, it is near the dissipation limit. Maybe it would be better at different operating points, but 10 mA minimum is the price of entry in the current circuit. If we add an output buffer then it would open up more choices, such as LND150, etc.
I have to say that the STP30N10F7 has seen a lot of competition and still remains at the top of the heap. Another thing I would say is that there is a definite 'house' sound. I thought that after recently testing the IRF510 in the gain position. The IRF devices have a sound, the Toshiba devices have a sound, and the ST devices have a sound. All devices of a given manufacturer have different specs that results in different sound but there are similarities between devices from a given manufacturer. Perhaps manufacturers have honed their techniques over the years and it does result in a sonic signature.
I have to say that the STP30N10F7 has seen a lot of competition and still remains at the top of the heap. Another thing I would say is that there is a definite 'house' sound. I thought that after recently testing the IRF510 in the gain position. The IRF devices have a sound, the Toshiba devices have a sound, and the ST devices have a sound. All devices of a given manufacturer have different specs that results in different sound but there are similarities between devices from a given manufacturer. Perhaps manufacturers have honed their techniques over the years and it does result in a sonic signature.