Yes, I know. It is designet for SMPS, and I have only them in stock so I use them for everything. Can't get better quality, no reason to have other types. If you experience problems with them, then you have a poorly designed circuit. And for audio: the real audio grade capacitors are the same as the Panasonic F-types, a high quality, low-esr capacitor made with same build method. It is just a high quality cap, then they brand it as audio cap. No difference in general. For filters, its another matter. An for sundquality: yes, the quality of a capacitor has a very big impact! just try it it.
If you really mean that replacing the capacitor to a Philips would solve the problem - then I would like to buy a couple of them from you. I just don't understand why it was equipped with a SAMHWA capacitor from the beginning if the Philips was the only correct one. (no it has not been replaced, it was original).
Peter