This one is for the bassists.
And the doomy guitarists.
And everyone else who likes to get heavy.
This is a Jfet bass preamp that sounds good itself but really shines when you engage the boost and drive it into thick, woolly distortion.
DISCLAIMER!!!!!!:
Don't let the name mislead you!
This has nothing to do with the beloved Sunn 200s.
It is designed after a schematic on the internet claiming it is a Jfet version of the preamp of said amp but it is actually a bass preamp that was probably designed by the great and powerful deadastronaut.
We learn: Don't believe everything you read on the internet!
But I am pretty sure that you Sunn-Lovers will totally enjoy the heavyness that this device is producing.