Sim Audio W-5 Fuse blew half way on the pre amp


My w-5 stopped working after cranking it just past half volume on my pre amp, why would this happen, I hope there is no damage on my w-5, any comments would be greatly appreciated.

Thanks
paulficarella
Thanks guys for all the info I think I will replace the fuse with the original size and call sim, and if this happens again I will replace the amp with a bryston 14bst or classe ca 301 maybe less headaches thanks all.
I had a fuse go in my W-5 when using a bryston pre amp at a higher volume level. Simaudio said that the bryston wasn't a good match due to the hot pin configuration on the xlr of the bryston.

I switched to a Simaudio preamp after that and haven't had a problem since. I have read that the Athetix calyspo tube pre also works excellent with Simauddio amps. Ditto on not putting in a bigger fuse , that's a no, no

Cheers
I sent my Sim W5 back for repair.Come to find out it was because the 120volt line was only dishing out 116volts coming to the house.Called the electric company and they came and adjusted the current and viola, perfect.All this after I spent $800 replacing the face plate which got damaged from sending it back.Crap.
Seems the Sims are critical on input voltage.
Worth Checking it out.

Peter