Did you try the SR Purple fuse in both directions?
If so, what turned out best - can you specify
the direction of the SR fuse writing with relation to the DS case for the best sonic results, such as front to back, left to right, or reverse of either (back to front, or right to left)…thanks
Not a nice message for Orange owners 
Oranges are still fantastic,
have two of them in other components and no desire to change.
Purples maybe not appropriate for that equipment.
Just that with my PS Audio gear, I wanted the best out of it.
(I run my system from a hardwired 10KVA balanced mains setup, so wanted to get the “max from my mains” with the better gear.)
Hence taking a punt on the SR Purples, and they ARE better.
Is what it is.
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Yeah I did Roger.
Definite improvement one direction over the other.
The fuse SR direction ----> runs the same way as the raised printed lettering on the plastic fuse cover,
Just as in the picture.
Hope this helps you out. 
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What’s size and amps for the fuse in PS audio dac, slow blow or fast blow. I would think it’s a slow blow look forward to an answer.
It is 1A small slow blow for the 120V countries.