Capacitor

Oldhvymec

You CAN use polar capacitors as long as you connect them back to back like positives together or negatives together.  This will HALF the value of the capacitance however. So if you intend to make a resultant of 10 uF of capacitance, you will use TWO 20 uF connected back to back. 
So this is one way of kludging it.  Another point to think is the LONGEVİTY of the capacitors. Polar ones will most likely be electrolytics and will NEVER last as long as film capacitors hence adding another reason to not use polars. 

@jasbirnandra 

If you have not decided on which 3.3uF caps, here is some feedback on the ODAM in the Canary.

Ok, I have 4 x 0.01uF CuTF and 4 x 3.3uF Odams. The Odams have 12 hours time on them.

My subjective findings so far. As granny said, these caps take a very long time to break in, and to make matters worse their character swings a little during the process. Even after 12 hours solid I feel they need a lot more time. The sound would go from recessed to so far forward that it felt like it went behind me, and then back to recessed again. Too little 3D to too much 3D, back and forth. 

At first I felt a little underwhelmed by the ODAMs, but the issue is they do everything very well, so nothing stands out to "catch" your attention. It is like a steady stream of good everywhere.

Bass is very extended and sounds very firm - very good for SET amps. The top end is also nicely extend and has a very gentle but crystal clear quality. I had sibilance on a particular George Michael song - its gone; the "S", the "P" and "T" sound is still clear and pronounced. I had problems with high piano note on a Diana Krall track - the problem is gone. I hear the note perfectly - it's still loud but it's no longer offensive.

The most enjoyable for me is the mid range. Voices and strings have a remarkable lifelike quality and I can say in all honest I have never ever heard sound presented on such a neutral way. The way the strings vibrate and change in tone as they decay is as real as it gets. Fantastic.

How much is contributed by the CuTF and how much by the ODAM I cant say. I have two in each channel. 

I'll report back in another 12 - 24 hours and hopefully I get a better handle on the soundstage, which I know is what you are looking for.

Regards

PS. to those condescending folks who feel they need to tell me I am not hearing what I have heard, that I have wasted my money, or that I have behavioral health problems, please spare me. It may come as a terrible shock to you, but your "expert knowledge" is of no interest to me. 

Yes Odams require at least 60 hours before even commenting on them 😊.   They will not go downhill after 60 hours and after 100 hours you are 85% there! 

I have placed the order for the jupiter copper paper in wax 3.3uf400VDC as for the other small caps I had replaced them long time back with the rike audio S2 Al in oil caps.
I am also thinking of changing the audio theta .33uf 600VDC in the canary grand reference amp
Does changing the amp caps also make a difference

" Does changing the amp caps also make a difference"

Yes, definitely. As far as tube components go - wherever you have a cap in the signal path, replacing it higher quality cap will improve sound. DAC, amp, pre amp doesn't matter. Some may have a larger impact than others, but all will contribute. 

Let us know how you like the Jupiters.