harmon kardon 3 way

I'd like to get some opinions on what I should do with a 3-way Harmon Kardon speaker set-up that I pulled out of my old 02 Range Rover... Here's what I have: Two 1" tweeters and two 3" mids. This setup also had two 6.5" drivers but were blown when I pulled them out. The tweeters appear to have an in-line filter but I haven't cut back the heat shrink yet to see for sure. The mids have no filter. Anyway I was thinking of maybe building a set of shelf speakers but I don't know what I should do about a crossover. All speakers are 4ohm and I would like to keep this a 3-way setup so I will have to get new woofers.  Also if anybody can tell me what the power rating may be for these things I  would appreciate it.  Thanks in advance.

It is a 6.5 Microfarad capacitor.  The 50 wv is 50 Working Volts.  NP is Non-Polarized.  There is a chart somewhere on this site that will tell you the crossover frequency of a 6.5 mic cap into a 4 ohm load.

Very near 6000Hz   https://www.the12volt.com/caraudio/cross4ohm.asp

Can anyone suggest a way for me to make my own crossovers for this setup?

https://www.the12volt.com/caraudio/cross.asp#bp

https://www.the12volt.com/caraudio/cross4ohm.asp

Figure out what frequenies you want to cross the mid at, I would suggest 6K as the low pass, and 250 for the high pass.  For the mid of course.  Look at the top link for a diagram to connect the cap and the coil.  The second link will give you cap and coil values.

Yes they are all to be wired in parallel, If the crossovers are designed properly, the impedance will be 4 ohms throughout the full audio specturm.