As those interested collectively in audio, we are capable of on many an occasion buying equipment, that we think might provide either something different, ...or better planned to indeed leap ahead &put us firmly on the road to a better audio experience.  If in the latter group,  we need to know a bit more, than just our bank balance.    The first amazing part ( of the topics gamut ) is the  jfet , it is a small signal device comprised of a source pin, a drain pin and a gate. a stud