So I recently inherited a pair of Sansui SP-2500 speakers. They have actually never been used and stored in a cool dry place their entire lives so the speakers them selves are in amazing shape. Sadly however, the crossovers inside of them have not done well with time. The sound quality of the speakers is terrible and clearly not like it should be. Both of the resistors in them measure out of spec, and although I don't have a way to test the capacitors, based on the sound quality and what people say online I think its safe to say they have dried out and need replacing. I need some help figuring out what exactly I should replace these parts with. It is for sound so it needs to be some good quality parts and I don't really have any experience with that.
This is what the speakers look like. Pretty cool I think.
On the back is this panel with the input and two knobs to select how the speakers sound.
This is the crossover on the back of that panel. You can see on the left hand side on the top and bottom it has two resistors that say they are 5W 16 ohms (I think?). The bottom ones measures around 18 ohms and the top around 22 ohms. On the right side we have two capacitors that say they are Bi-Polar and one that says its Non-Polar. I have no clue what these mean. All five of these components need to be replaced with new ones, so I will need some help figuring out what exactly to replace them with.

This is what the speakers look like. Pretty cool I think.

On the back is this panel with the input and two knobs to select how the speakers sound.

This is the crossover on the back of that panel. You can see on the left hand side on the top and bottom it has two resistors that say they are 5W 16 ohms (I think?). The bottom ones measures around 18 ohms and the top around 22 ohms. On the right side we have two capacitors that say they are Bi-Polar and one that says its Non-Polar. I have no clue what these mean. All five of these components need to be replaced with new ones, so I will need some help figuring out what exactly to replace them with.