Synergistic Research Orange Fuse

dhart86- tommylion is saying the same as me and we both are correct.
When my first Orange Fuse burned it was in a new Herron VTPH2A phono stage. So I called Keith Herron. Highly recommended, one of the best in the business. Told me way more than I ever imagined there was to know about these things. Plus being an x-ray tech I x-rayed and so know how these things look inside. That's how I know fast and slo blow are the same.

Anyway, Keith never blew a single fuse not even in testing nor any customer before me. Mine blew the instant the thing was turned on after being off a long time. As with most components the highest amperage draw is right at turn-on when the power supply caps are charging from being empty. That is max current draw. Yes even for high power amps. Right at turn-on.

Next thing he said, you didn't hear this from me, but if you want to use a higher value fuse its all right with me. Won't void the warranty. Won't do a thing. Because fuses do not work the way the so many around here think. But that is another one for another day.

Straight forward: Buy the higher value. Seriously.

Why not just contact SR and ask so you get the direct response and have a record of it in the event your amp does get damaged ; or if you do run into fuses that blow.

I just checked, and SR does offer a 15A Orange fuse. I would actually recommend the 16A to give you a little margin in case your amp draws more current at turn on. Any catastrophic event that will blow a 15A fuse will also blow a 16A.

Littelfuse has been around since 1927, designs award winning products for thousand of applications, and their fuse ratings are absolutely accurate...the fuse for my amp is superb and cost around a dollar. "Special" fuses add nothing to the sound of a component, and, as in the case of a pile SR fuses I tested a few years ago, it seems SR can't even properly rate their fuses. Avoid these.

I'm quite sure SR doesn’t manufacture the base fuses, but OEMs them from another company. It could even be Littel. The other thing is that the SRs are ceramic body, glass filled, a better design than the glass ones that come standard with many components.