Old sansui crossover help

Hi
I got this old pair of sansui esp 305 speakers and are seing if they need some replacing/repair and what not. I was just wondering if some of you guys understand the crossover better than me?

An externally hosted image should be here but it was not working when we last tested it.


The red wire is going to the woofer, yellow to mid, and blue to tweeter

I got it to be a crossover with 1.8kHz and 5kHz points from searching the web.

Hope some insight can be given
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