Desktop speaker with Markaudio Alpair 5.2

Too right, general film, pulse etc. caps from the big electronic component retailers can often mean big savings. :)

I agree, a quality PP filmcap is a good one, those for audio are often overpriced and not better. There are measurements done of a few and the difference in sound is so minimal (like less than 0.1dB) that it's not worth considering to pay those prices. I always use those that are the cheapest availeble in small quanities, but if you need a lot or are often ordering from the big suppliers, take industrial ones from Wima or so and it wil also sound good.

The measurements i was talking about are found here: Capacitor upgrade in crossover - Is it audible? | Audio Science Review (ASR) Forum