Audio Systems: speaker shorting out, 4 ohms, watt subwoofer

Question
How do I insure that the ohms won't drop lower?
Thanks!!
-------------------------

Followup To

Question -
Hey, I had been using a 10 inch loud pioneer loud speaker with a 300 watt max amp and it sounded good until I added a 700 watt subwoofer.  And both were bridged together. It played fine and loud for a minute. and after that as I turn up the power, the 300 watt speaker shorts out until I turn it back down, but when I hook up the 700 Watt Legacy speaker it will not short out but It doesn't have much power.  Can you please give me any advice?

Answer -
the problem is that you cant just mix and match stuff like this.  its always going to perform extreamly poorly.  you need a pair of the same type of subs and you need to make sure that together they dont drop the ohms lowwer than what the amp is rated for.


Answer
well its just mathmatical. you can either put the subs in series or parallel (if you need explaination on that let me know) but first of all you need matching subs or it's going to sound HORRIBLE!!  once you have matching subs if they are 4 ohms and you have 2 basically all you do is this:

series you multiply the number of coils times the ohms of 1 coil

parallel y ou divide the number of coils by the ohms of 1 coil so:

series = 4 ohms times 2 coils = 8 ohms
parallel = 4 ohms divided by 2 coils = 2 ohms

if your amp doesnt support 2 ohms then you are forced to wire the subs as 8 ohms to keep the amp from overheating and shutting off. unfotunatly the amp may not put out it's maximum power at 8 ohms, it may be built to run 4 ohms.  without knowing exact model numbers I cant help you but you need to get the balance right or it will always come out sounding horrible or being underpowered or overloading the amplifier.
I'd be happy to help more if you want to find a good match for what you have.  since you have 2 different types of subs you may be able to find 1 of either of them on ebay or something to get a matching set.  but before you do that we should make sure that the ohms of them would match the amp you have right.

Let me know what you want to do.