2. amps-preamps
  3. 191770-3130

??? Fuse UpGrade??What Size???

 In an effort to maximize the potential of my SimAudio Moon 240i integrated amplifier I have decided to try one of the Synergistic Research Purple fuses...
 The owners manual states it uses a 4 amp,Fast Blow,Type AG fuse..
 However,there are 2 sizes of this fuse offered,5mm x 20mm & 6.3mm x 32mm..How do I determine which size I need? Pulling the old one out & measuring it comes to mind but I was hoping there is a faster way to determine this...
 Thanks very much for any assistance..

freediver
freediver OP
1,173 posts
 

Sweet..I did not know the AG designation related to the physical size..Thanks much..

jastralfu's avatar
jastralfu
359 posts
 

@freediver keep us updated on the outcome.  I would be interested if you notice any difference.  I swapped in a Purple Fuse and did notice improvement, wasn’t night and day but there seemed to be a wider deeper soundstage and improved imaging.  Could all be in my head but I don’t think so.

freediver OP
1,173 posts
 

@jastralfu ,WilCo...

captaindidactic
79 posts
 

Let it burn in for a week and then switch the direction. If it wasn't in the optimal direction, you should hear a very noticeable difference. If it gets worse, well switch it back. I tend to oversize the fuse... thicker wire. 

hilroy48
161 posts
 

Go with a 6 amp fuse Fast blow. SR fuses had a history of blowing on inrush current startup if you went with factory size. 

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