Help with crossover capacitors

The value of the cap changes the frequency response of the circuit. Such slight changes will be very hard to hear. Essentially all that will happen is one driver output will be a fraction of a dB higher or lower. But because the values are so close this will only affect a very tiny frequency range. In other words very, very hard to hear any difference- from this aspect of the cap swap.

Each different cap however will have its own individual sonic signature, and this by contrast will be across its whole range and so very easy to hear. Bearing that in mind I would not worry too much about the values. 

In other words, you will know instantly that you changed the caps. But the difference you hear will be due to the brand of caps and not their values.

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.