Fusing my subs

I just wired my subs in parallel and I need to know the right size fuse I need to fuse my subs.  The rms on the subs is 200 and the ohms is 4.  But when the two subs are wired in parallel the ohm load is 2.  So I don't know if I should use the total ohm load which is 2 or the 4 ohms from the sub.  So basically should it be

the square root of 200/4

or the square root of 200/2

So if anyone could give me a hand Id appreciate it

Don't fuse speakers.

Sure you can fuse speakers, dwarren.  They're connected with a power wire, and any wire that carries amperage can be fused.  It's just usually not done because you've taken the precaution of matching the speakers to the proper amplifier and setting gain correctly.

Use 2 ohms as your factor, which is the combined impedance of the two subs...using that because the subs are wired together.  The nominal wattage of the subs is 200 X 2 or 400...so you are thinking in terms of using 400 watts and 2 ohms in your equation ( I = sq rt (P/R).  But don't use the nominal wattage because there are going to be peaks in the signal that will blow the fuse.  You should use something near the sub's peak rating and a slow blow fuse for this, and it will be just one fuse for the set of subs.  It should never blow, because that would be a PITA!

And keep in mind the fusing will not protect the speakers from getting a clipped signal...but I figure you already know that.