September 9, 200916 yr I had the fuse in my Klipsch iFi subwoofer blow. It's a 2A 125V slow blow fuse. Went to a couple Radioshacks and they only carry a 2A 250V fuse. Is it okay use that as a replacement? At the first the lady said, "Probably, but I wouldn't bet my life on it." Second store guy said "You only have to worry about over-wattage." My concern is that if something hits say... 200V and the fuse doesn't blow, will I end up damaging other components downstream?
September 9, 200916 yr It is my understanding that current blows a fuse, not voltage. So you can happily use higher voltage parts.
September 9, 200916 yr Yes, it is fine. It is the current rating that you need to pay attention to; that and whether it is fast blow or slow-blow. Most fuses seem to be 250V anyhow...
September 9, 200916 yr the fuse may blow but still conduct (due to arcing) if the voltage is higher than rated wikipedia about 1/3 of the way down.
September 9, 200916 yr Author And now I stuck it in, turned it on, and instantly blew the fuse... I guess my problems are a little more complicated now.
September 9, 200916 yr No, they were a little more complicated before, you just know that now. (I mean, seriously, how else do you blow a fuse on a speaker, unless you got amp problems?)
September 10, 200916 yr Author Borrowing one tonight. Going to check the current across the holders later tonight.
September 10, 200916 yr Dont do that, measure DC voltage. Likely to blow your sub if you try and measure current by replacing the fuse with the dmm, since there is definitely something going on.
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