Fuse upgrade from factory.....

Take baby steps. The SR fuses might be the best way to go but take heed of rodman99999's advice and try out the fuses on discount.

Just yesterday I tried out three different fuses that I had laying around on my Kinki EX-M1 integrated. They all sounded different. For awhile I settled on the PADIS fuse as I liked what it did to the bass and mids. 

A few days prior, I enjoyed the company of a recording engineer as we listened to one of his recordings. Although he felt the sound bettered most of what he's heard at audio shows, it was still off and simply wrong as it related to his recording and what he knew it could sound like. 

Perplexed, I realized that the fuse wasn't the one that came with the unit and put that one back in. I believe it's a Schurter, ceramic tubed fuse that you can get for $2.00, which is way better than any of the glass fuses out there. 

The bass and mids tightened up with better attack, separation, and decay and the highs got airier and much more realistic. It's back now to sounding like you're in the studio with an almost stark reality. Also, I have gone through two different speaker cables since the use of the PADIS fuse so I neglected to take those variable into account. Too much fiddling.

Long story long, try out the cheaper fuses first and see what direction they take you. Then proceed from there.

All the best,
Nonoise

 Paul McGowan of PS Audio has stated at his website that fuses do make an audible difference. I certainly heard a nice improvement upgrading the fuse in the PS Audio Direct wave Transport and also their DAC.

I have replaced the original fuses on my three different Pass Lab amplifiers with the Synergistic Research Black fuses, and in each amplifier their was a significant sonic improvement. I have since upgraded to the SR Blue fuses but there is a great price to benefit ratio with the Black fuse.
 I have tried the Isoclean, Hi-Fi, Padis, Furutech, and SR 20 fuses and all of these fuses make a small difference. The Synergistic Research Black and the Blue fuses have a much greater and better effect than these other fuses I have tried.
I have spent several hundred hours comparing fuses and the above is a simple and condensed summary.
David Pritchard

Thanks all for the suggestions. I may just try the S.R black from The CableCo. 

Don't mind koost. He's a First Watt nut job. By the way, the very same recording engineer bought a First Watt amp some time ago and said it was one of the worse sounding amps he's heard. 

All the best,
Nonoise