The Synergistic Research fuses resulted in improved detail across the entire frequency range. Because no one frequency band was favored, there was not an increase in brightness, fatigue, of warmth. Instead there was a sense of more music playing in the room. Never a feeling of signal boosts or frequencies being deminished. This is with the following equipment- Art Audio PX-25 tube amp, Eddie Current- Zana Deux tube amp, Marrantz Sa11-S1 SACD player, and a Marantz Sa11-S2 SACD player.
I did find replacing the rail fuses worth changing in addition to the main fuse with the Marrantz Sa11-S2.
I did find replacing the rail fuses worth changing in addition to the main fuse with the Marrantz Sa11-S2.