Can someone help me design or at least help me learn the basics how to design and build a DIY Crossover for an Altec 807-8A HF driver.

At the moment, I don't have much to go on other than
the horn driver is rated @ 30W, 8ohm.

Can I build a simple crossover and L-pad system that filters the low freq so as to protect the driver so I can hook it up parallel with any 8 ohm speaker jack up to
30W yet powered by any amp up to 100W?
I have several amps having different power ratings.

I will draw up what I am thinking of and post it to clarify.