Coupling Capacitor upgrade? Which one first?

What's in place at the moment make/model/value uf and volts, polarized or non-polarized 

Cheers George

Dac is altmann attraction dac with 3.3uf wima mks2 63vdc output coupling caps. Amplifier is a diy chip integrated amplifier with 4.7uf wima mks2 63vdc  input caps.
Both working with 12v.Using 35v plus will be enough I think. 
Source is linear psu powered esi juli xte sound card. Speakers fostex full range bass reflex.

I tried to change wima leads with non-magnetic leads. There was an improve ment.
I also tried to use beeswax filled electrolytic cap(it is a diy effort) for input of the amp.I started to get soundstage information and vocals had more clarity.
But electrolytic caps seems unstable performance for dc blocking. And I realized a good cap can be very good :)

Still I don’t understand why wima caps aren’t good enough. But I decided to try a good cap. But they are pretty expensive and probably all of their website has no information about their products.

Audiocap rt or theta ppt
Jantzen alumen z cap
Rike audio s cap 2
Jupiter condenser beeswax ht or wax ht
Lefson c-mod
Intertechnik audyn tri reference
Clarity Cap cmr
Audience auricap xo
Jantzen superior z cap
Mundorf supreme evo oil

These are all I listed from reading all over the internet.. :)

I really like Cornel Dubilier over Wima's.

Cheap, small. Worth trying.

RIFA 450 are inexpensive and better than Wima. But try 3.3uF and 4.7uF Jupiter Copper foil wax if you want the best.

Still I don’t understand why wima caps aren’t good enough.

They are, I would suggest save the money and look for a "direct coupled output" dac with TDA1541 or better still PCM1704 even 1702.

Cheers George