As if this form wasn't technical enough, it's about to get worse... So here's the deal; I am going to punt on buying a new pair of Summit X's and explore upgrading the crossovers in my ML Odyssey's. The sound is so beautiful that I can't justify the X purchase... yet.
So I have the schematic from ML, and there are two crossovers really, one for the panel and another for the woofers. First the woofers - simple crossover per woofer: one inductor in series as you'd expect, one capacitor in parallel with the woofer. The capacitors are 100uF (forward firing) and 170uF (backward firing); these will be replaced by Mundorf MKP, with 100pF and 150pF respectively, and it's hard to find better caps with such high values. Question #1: what will the 150uF cap do to the rear firing woofer, as opposed to the original 170uF, and by extension, what will a 220uF cap do?
Then comes the panel - here we have four capacitors: 10uF, 13uF, 51uF (all polypropelene) and one 47uF polyester. The question is then - what are the best capacitors for this type of application? For the three polypropelenes I can only find the very expensive but super-performing Deulund VSF's, for a total of $1500 per speaker! I can't find yet a *worthy* replacement for the 47uF . Next, what happens if you replace a polyester with a polypropelene?
There are some incredible caps out there, from the Mundorf Supremes, to ClarityCaps, VCaps (some, not all), all the way to the Deulunds, and some interesting comparison blogs, like audiocircle, humblehomemadehifi, and laventure.
Whatever I chose must not alter the overall character - for example, I read that the Mundorf Supreme Silver in Oil et al tip up the treble at the expense of the bass, while the Deulunds are allegedly completely neutral.
What do the more knowledgeable have to suggest?
PS: I'll start another thread on coils and resistors later on; for resistors at least, I am going with Mundorf M-Resist...