I just got some pioneer 6 1/2 4 ohm speakers for my door and some pioneer 4 ohm tweeters, what I would like to know is does the law of ohm work with these speakers also. If they are wired in parallel will they present a 2 ohm load to my amp? Or does this law of ohms only work sufficeintly with subs. Second part of my question is I got some Fosgate T1693C 6x9 which are 110 rms, my amp only puts out 60 rms. Would that much of a difference in power; highly affect these speaker performance and sound. I have Pioneer 6x9 also that only require 50 rms and Im trying to decide with ones would better fit the bill. Thanks HCF

 

Depending on your crossover network, a 6.5 inch 4 ohm speaker with a 4 ohm tweeter could still present a 4 ohm load. Usually when you use a capacitor on the tweeter it will lose its place in the resistance chain for some odd reason. Don't believe me, try checking your DC resistance with a digital multi-meter.

As for your 6x9 dilemma.... I would say try both. In theory, the Pioneers would play to their limits with 60 watts RMS since they only handle 50 watts RMS. Conversely, that doesn't mean that 60 watts RMS will not be enough to make your Rockford Fosgates sound good. Since you have both, give it a try and see. All it will take is your time

 

You should have a crossover. Do not connect tweeters directly in parallel with the other speakers; feeding low frequencies to a tweeter will burn it out.

If the tweeters have a simple capacitor built in to serve as the crossover, like Gunz4me said you really don't need to worry much about impedance. Just hook them in parallel and it will work.