Originally Posted by Lt_Ballzacki
Thanks that is exactly what I was looking for. Although I am probably just going to get an active xover and use the hp on that and the lp on the amp.
Edit: I figured out this won't work because my mids need a low pass that will go 5k- which is nonexistent. Could you link me to a few bandpasses, I am having trouble finding any.
Another question though...
If you use an active crossover on a speaker with a built in passsive one, will the passive xover points be messed up? Would it be better to simply use the passive crossover?
I'm just trying to crossover this
mid. Could I just do a highpass at 85 hz. It would roll off anything below 85 but the driver would distort anything above 5k?
OK, the difference between active and passive crossovers in an audio system are generally that active is powered and used BEFORE
the signal reaches the amp, therefore, the amp gets only the frequencies the amp's separate channels are meant to boost, thereby working more efficiently than having the amp try to boost a wider range of frequencies than it needs to.
A passive crossover, OTOH, is "usually" placed in-line with the speaker AFTER amplification to protect the speaker from having to try and reproduce a range of frequencies outside of its core competence, e.g., keeping mids from having the try and reproduce <50Hz or >5k Hz. (Or whatever the rating happens to be).
So, to answer your question about active vs passive set up "messing up the crossover point".... NO, a passive crossover doesn't ever change as it's "SET" at a particular pass frequency, e.g. low, high, band.
Net result is that you should be able to send ONLY the frequencies you need amplified to the amp using the active crossover points BEFORE amplification and the frequency out isn't changed. 85-5k IN, 85-5k OUT.
If the RockyFoz has a built in passive crossover, you're covered as its already protected from frequencies above below it's operating range. But that doesn't mean you shouldn't use the active ahead of the amp. Helps to produce much cleaner sound out of the amp without the extraneous frequency garbage.
EDIT: Just realized you asked for specific models.... this one (and others by Rockford Fosgate) are made for the specific speakers (mids) you're working with: http://www.crutchfield.com/p_575PP4X...nch-PP4-X.html
And this for component tweeters: http://www.crutchfield.com/p_575PP8X...nch-PP8-X.html