At what frequencies do i set the car audio crossover points?

i have 5 1/4" in back and 4x6 up front. the amp has a fixed 85hz hp filter. but i suspect that is still to low. the speakers are rated for 5-40 rms and 120 peak. the amp is a mtx 50x4. i am considering getting a f-mod from crutch field (fixed hi pass plug for rca) but i wanted to get opinions for a good frequency to go with.


Anyone have 2 12 in l7s hooked to a 1500 zx kicker amp??

For 50wrms x 4, 85Hz is fine. I wouldn't buy f-mods until I listnened first. If you did add f-mods, they would only do you good if you wanted the cutoff point at a higher freq.
I personally have my hpf @ 80Hz, lpf @ 80Hz as well. My door speakers (4x6's, 6 1/2's, and 6x9's) move a little for the upper-bass response and their fine. They all get about 50wrms, each.
Anyways, all speakers are different. In fact, your 4x6's would perform at 'peak' with a different cutoff point than your 5 1/4's, but that is hardly measurable.

How do I split an output of my car amplifier for a parallel speaker setup?

Just see what it's like now. If your door speakers get distorted or muddy from too much bass, the f-mods are the way to go (100Hz would take care of it, if it's a prob, should be fine though).
It's up to you!
Good Luck!

What type of amp set up gets more power out?

Around 28 so you don't blow them. To much isn't always good.

I'm having 1988 Dodge Dynasty Head Unit Wireing Harness Troubles..?

If you have subwoofers, set the high pass filter for the speakers to around 80hz (the setting you have it on is good), using a -12db per octave slope or greater.
Then set the low pass filter for the subwoofer to around 80hz as well.

Boss car speakers quality?

If you don't have a subwoofer, you can set the high pass filter to around 50hz... but don't push it. If you hear distortion, decrease the bass going to them.
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