when a 2 channel amp is bridged it actually sees half the load of the subs. so when the sub load is 2 ohm, and the 2 ch is bridged, then the amp actually sees 1 ohm per channel. if you want to see some formulas that prove it, i don't have any for you, i'm going off of what every good installer, that has ever taught me anything, has told me. and if you go talk to any good installer, and i mean a GOOD installer not just any installer at an electronics store, they will tell you the same thing

and to answer this, those subs would only run at the best performance if both subs are wired in parallel (meaning the positives and negatives share a terminal) and bridged across the amp

 

you just proved your previous statement wrong....1 + 1 = 2... if each channel sees a 1 ohm load thats 2 ohms combined when bridged which is your ohm load coming from the subs to begin with so what was your point to begin with.....

i think what your trying to explain is that there is more than one way to make a 2 channel amp act like it's bridged.... if your amp is 4 omh stable bridged and you have 2 dual 4 ohm subs you run them in a series parrallel to get a 4 ohm load...or you could parrallel each sub resulting in two 2 ohm loads and run the amp in stereo...and get the same amount of power.. i'm not trying to argue with you ..i think it just wasnt explaind very well

 

Just use this: http://www.the12volt.com/caraudio/boxcalcs.asp

 

You're correct. Bridging the amp does not effect the ohm load. I've been installing for quite some years and if my install experience doesn't prove me right; my certifications should. Not to argue with anyone... you just have to make sure you're adding the numbers up correctly or you can blow up your gear.

I'd stay away from crutchfield, they're over priced.