Pass Lab amplifiers respond wonderfully to having a Synergistic Research Blue fuse installed. This has been my experience with my First Watt F-7 amp, Pass Lab INT-60 amp, and his wonderful headphone amp the HP-1.
As a bonus the fuses are easy to get to so it takes about 3 minutes to swap out a fuse. I can not think of an easier experiment to improve the sound of one's system.
As a bonus the fuses are easy to get to so it takes about 3 minutes to swap out a fuse. I can not think of an easier experiment to improve the sound of one's system.