I have a tube preamp with a 5K output impedance. I want to use my sub plate amp which seems to be 10K. The pre has 2 parallel outputs. I want to use my GetSetGo full range or maybe put a 4700pf cap on the input to roll off the bottom end around 80Hz. I am thinking a unity gain buffer between the preamp and sub amp is the best option here. Does anyone have a view or recommend a buffer circuit to do this. Would the Firstwatt B1 work? Something on a small PCB would also be a consideration.
thanks
John