Capacitance: Help me understand

High capacitance usually rolls off the high frequencies, not the midrange -- plus, I didn't think the WW Gold Eclipse III was a high-capacitance design. Maybe something else is responsible for the reticent midrange; without more details, I couldn't say. Good luck, let us know if you track down the problem. One cheap way to see if it's the cables is to swap the WW cables for something different and see if the balances changes to your liking -- heck, some standard 14 or 16 gauge zip cord from the hardware store would tell you what you need to know.

There are few errors in kkirkpa's post. Yes, it has to do with the storage of electrical charge. But the idea of storing energy during loud passages and releasing energy during soft passages is a little off base. The signal from the pre-amp is constantly charging and disharging this capacitance. The energy is stored and released at the same frequency as the electrical signal, i.e. if fed with a 1000 cycle signal, the cable is being charged and discharged at this rate. The preamp sees this capacitance as part of the total load it must drive. Loudness really has nothing to do with it. It turns out that the higher frequencies are more affected by this than the lower. The higher frequency currents flow more easily through the capacitance than the low frequencies, so as Plato points out, you have less high frequency energy reaching the speakers as the capacitance increases. Some very wide bandwidth amplifiers like Spectral recommend using high capacity interconnects from the preamp to limit the very high frequencies getting into the amp.
The construction of the cable does determine this capacitance. There are three factors. Size, distance, and dielectric. Larger wires with more surface area and putting the wires closer together will increase the capacitance. Changing the dielectric (the material separating the wires like the teflon mentioned above) will also affect it. Air has the lowest dielectric constant and will give the least amount of capacitance.
That being said, I doubt that this is your problem. I would suggest experimenting with speaker placement as a way to affect your center image and soundstage. Start by moving them close together and toed in until you get a clearly defined center image with limited soundstage. Then move them apart and toe them out to expand the soundstage until your center image gets too diffuse. Somewhere in between is where you want to be. There will be a sweet spot where you get both. Of course, this also affects the frequency balance. It takes a lot of time a patience to get it right, but nobody said this was going to be easy.

I think Bruce1483 is correct on this issue - this sounds more like a speaker placement problem. I can assure you it is not the capacitance of the WW Gold Eclipse III cables - they are a low capacitance design.

I have interconnects that will COMPLETELY change the soundstage and tonal balance due to their high capacitance design. Mids are slightly distant and sunken, highs are smoother with less splash, bass is slightly elevated which adds warmth, etc... These work fabulous for systems that are bright, hard or way too forward. As such, they can take a digital based SS system and turn it into something that is warm and musical. A few others have commented about this cable in the past. Like anything else though, the results are both system dependent and up to personal tastes. ANY interconnect that uses a foil shield is a high capacitance design. Sean
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Rzado - how do you come to the conclusion that the Wireworld are low capacitance? Here we have two "shield-type" braids separated by a very thin layer of teflon. Large surface, very close together - am I missing something?