ParaSound Halo A21 vs Nad M25

Hello to all I have a Parasound a21 ampliifer and I can tell you for a instant upgrade there are 5 fuses a 12a T
30mmL on the back ,and 4 8aT 30mmL inside the amp You spend the $450 or less with discounts of the Hifi tuning Supreme fuses ,this and a Very good high current power cord ,Nothing cheap, and you now have a solid 10% + at least improvement across the board .The fuses take a solid 48 hours to settle in after day 3 fantastic the fuse are directional on the back fuse put that in facing the front,
the other 4 internal fuses from the transformer to the capacitors or all arrows facing the rear .and do take some 90% Isopropyl alcohol to clean the fuses contacts
or caig pro gold .You won't believe the added resolution
clarity or added musicality .forget the Money $$ outlay
it is less than a set of decent interconnects and it is the biggest improvement per dollar out there !!

I know this is an old thread, but I believe the fuse directions are reversed. I tried them both ways a few times and much prefer the fuse on the back pointed out and the internal fuses pointed toward the front. It is much more extended and clear this way for me. Therefore, I would recommend trying them both ways.

Hello Audioman58,
I have recently replaced both the main and the 4 rail stock fuses of my Parasound A21 amplifier with Hifi tuning fuses. I replaced these fuses in sequence. First replaced only the main fuse by Hifi Tuning Silverstar fuse and it immediately improved, while breaking in, the sound in all areas.
Then I replaced the 4 rail fuses with Hifi Tuning Gold fuses (couldn't get the Silverstar in 8A) with arrow pointing to the flow of the current i.e pointing from the transformer to the capacitor. The result wasn't so impressive. While it increased the clarity but the instruments started sounding very hazy and smeared. The overall sound was also veiled. It has been 20 odd hours since I replaced the internal fuses and they might still be going through the break-in interval. I tried flipping the fuses such that they point to the transformer to see if that resolves the haziness but it didn't.
Did you have similar experience when you replaced the rail fuses inside the Halo A21? You have mentioned a 48 hrs break-in period for the fuses. Did you have similar experience during the 48 hour break in period? Any feedback/help in this regard would be really appreciated.
Thanks.