QUALITY AND SECURITY OF "LITTELFUSE" PRODUCTS

That's the only fuse I trust in my electronics (I am happier when they aren't  fried -- they tend to sound better that way).

Also, for surge and fault protection: if your Spectral amps have crowbar fault protection, Littelfuse SCR's and diacs are there as a replacement. Unfortunately, they no longer make the PA series MOV's (Galco sells an equivalent). 

All in all, solid company and solid engineering. I, for one, wouldn't be surprised if their engineers don't know about wire directionality. Whatever that means. In an AC system.

Wow such big letters very important!!

Since this thread is on the subject of fuses. My preamp uses a 1/2 amp 125 volt fast-blo fuse. I was told that I can use a 1/2 amp 250 volt fast-blo fuse as a replacement if needed. Is it safe to do this?
  

Yes, that's correct Yogiboy.  See my posts dated 3-14-2016 in the SR fuse thread.

Regards,
-- Al
 

Thanks for the info Al !