Dhl93449,
My experience with the Mundorf S/G/O was that they added too much emphasis in the treble. I do not have any experience with the S/G capacitors but I suspect I would like them even less than the S/G/O as I would expect them to be brighter and maybe a bit harsher. Given a choice between those two I'd go with the S/G/O, but as I'll describe below, at this level I'd go with the Clarity MR capacitors.
My crossover journeys have ultimately led me to Duelund CAST-Cu capacitors, however, along the way a capacitor that I liked a lot was the Clarity MR. They are fast, extremely quiet, dynamic, very well balanced from top to bottom, spatial and holographic. To those attributes the Duelund CAST-Cu adds a naturalness of tone, greater harmonic richness, and I think perhaps greater sustain although it's been too long since I made that change to likely recall that attribute accurately. Also, I would say that the Clarity MR beats the Duelund VSF-Cu in everything but tone and harmonic richness. I recommend the VSF or CAST ahead of the MR, but unless going with a Duelund crossover, my experience leads me to recommend the Clarity MR without hesitation. I would add, however, that Bill's experience with the Jupiter copper foil caps should not be ignored either, I just don't have any experience with them. Again, based on my experience, and considering budget, if it were my project I would use the Clarity MR's throughout, connecting 2x10micF + 1x27micF caps in parallel to give me the 47micF equivalent for that big value. I strongly prefer the Clarity MR over the Mundorf S/G/O, and as I said, I'm quite confident I would like the Mundorf S/G even less - but comments such as these should be placed in the context of one's system.
Also, depending on what internal wire is already in the speakers I would also consider rewiring the speakers. On my projects I have had very satisfactory results using Kimber TCX. The effect of doing that should not be underestimated. Kimber's Hyper Pure grade copper has no grain that I can hear. Wherever copper wiring is used in my system (interconnects, speaker cables, crossover wiring, speaker wiring) that is what I use. They system is very, very free of grain.
What resistors are in the speakers? My preferred resistors are Mundorf M-Resist 20W. I think Bill likes Mils? Others will recommend the Duelunds, though in my systems I preferred the Mundorfs. For me the M-Resist give a very nice, solid weight to acoustic strings - I don't like plucked acoustic strings to sound too wispy so have come to like the M-Resist a lot.
I do have a couple of questions though. In your original post you said that you wanted to upgrade your crossovers, and in a subsequent post you said that you wanted to maintain the character of the 803. So my questions are: (1) what are you hearing (or not hearing, as the case may be) that has you motivated to upgrade the crossover - what improvements are you seeking?, and (2) what part of the character of the speakers are you wanting to maintain? In what direction are you wanting to take your speakers and/or your system?
Also, what inductors are in the speakers?
Finally, as an upgrade example, I am currently helping a friend with a crossover upgrade to his Silverline LaFolia speakers. The LaFolia uses well-integrated tour-de-force of drivers including the Dynaudio Esotar T330D tweeter, so I have a pretty good feel for where we are headed. For that project we are using:
- Clarity MR 630 VDC caps
- North Creek 10awg inductors
- Mundorf M-Resist 20W resistors
- Kimber TCX internal speaker wire
- WBT Topline binding posts
Unless my friend were going to spend a lot more money I think this will be a very nice setup.
Cheers,
John
