Help with crossover capacitors

Thank you for a clear explanation!  Is there a reasonably priced cap that you recommend?  

I would stick with the original values. Easy to do. Don’t accept 7-10% variance! Order your caps matched within 1% for right and left speaker. Don’t buy Dayton. If you don’t want to spend much, then get Clarity CSA 250v. They have a 3uf. For the 6uf just combine a 5.6uf with a .33uf 630v.

If you are ok with spending more look at the Jupiter VT line. Best to stick as close to the original values as possible.

Also, replace those sand cast resistors with Mills MRA12. Much better sounding!

By combining capacitors would you just solder them end on end?  Big one first?  I have a ton of soldering experience but I don't know the science very much.  And what don't you like about the Dayton stuff?  Have you done an A/B comparison?  Is that different?  I have well trained ears but I also don't need the most amazing system. I was given these speakers so I don't know how much difference it will actually make between the Dayton and something like the Clarity caps.  I'm not going to spend any more than $50 a speaker to re-cap them.

Go with the Clarity. Yes they sound better in every way compared to the Dayton caps. No contest. When combining caps to achieve the value you want you simply parallel them. Stack them with the small one on top and simply solder the leads on each end together. 

Be careful dannybad, a lot of people around here are eager to advise on things they have no actual experience with. Differences between caps are easy to hear. I'm talking electrically same value caps. Back when I didn't know this the designer of my speakers sold me a tweeter upgrade that called for a different crossover. He gave me the circuit which when built sounded nothing like what I had heard in his lab. It sounded like crap! After asking a bunch of questions and being assured I used all the correct value caps and resistors and point to point soldering he finally asked which caps? Well, Radio Shack. A week later with a Hovland MusicCap and Holco resistor and wow, magic! Bye-bye grain and etch, hello lovely liquid music!

Bear in mind this was going from Radio Shack caps sold five to a pack for a buck fifty, to Hovland MusiCap sold one for about $35. How much difference you hear will depend on what you're comparing. In any case, as long as your values are as close as you're saying then virtually all of what you hear will be due to the caps themselves and their quality and NOT have anything to do with the values being slightly different.

If your crossovers are working then I'm not even sure why you would want to replace the caps, as there's a lot easier/better places to put your money. That said, if the caps in there now are as cheap as they probably are then you should be able to easily hear improvement in smoothness and detail when upgrading to some quality caps.