KGST is essentially a mini-BHSE, but as Paradoxper mentioned, the KGST uses the 6S4A to handle output directly, but otherwise the constant current source is the same. This gives it a little bit more of a tube-like sound. That said I found it to be very dynamic and would not label it at warm.Considering that I would prefer to possess only one electrostatic amplifier, I believe that the KGST possibly would be the amplifier that would be the most suitable model for me, considering that you feel that the sound for the KGST would be in between the sound for the Blue Hawaii Special Edition, and the sound for the Megatron.
However, I previously had seen that people had considered the KGST to be within a tier of performance below the Blue Hawaii Special Edition, and the Megatron.
Would you possibly feel that that would be the case?
The BHSE is a superior amplifier but the KGST is the best value on the market for a Sr009S or Sr009.