Easy to build SRPP based 3 tube stereo line stage featuring regulated power supplies, and a simple transparent sounding audio topology. Purist design with simple audio path and no tone controls. Tube complement is a single 6U8A and a pair of 6189/12AU7A/12BH7A. This high performance project should satisfy the advanced builder, and yet is simple enough that a careful beginner should be able to complete a unit based on this design successfully. Customizable, and a tube rollers dream. Compatible with a wide range of modern and not so modern audio gear.