prefered crossover freq's, question for all that like sQ and not just boom!

[armani2 10+ year member]

I was wondering what the best crossover freq's would be for my system, I have some overlap, I have 2 JL-W3v2's behind the back seat, 1 JPL mid on each side of the back seat, 1 JBL mid on the lower front door with tweeter connected to them capped off,

my sub amp is a JL 500/1 can be crossed at 45hz or above, then the highs are controlled by a JL 300/4, first of all where would you set the subs at? I move them from 55hz to 80hz to see what sounds best, knowing that were would you cross the rear two mids, and after that where would you cross the front two mid and tweeter combo's

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[maylar 10+ year member]

Subs usually lopass at 70-80 Hz.

For front main speakers you want as much bass up front as possible, so start at 80Hz hipass and dial them down slowly until they start to strain at full power. If you can get down to 50Hz that's as low as I'd go.

I wouldn't amp rear speakers at all, just run them from the HU power. That's my preference. If you insist on amping them, 80-100 Hz is probably good.