For me, the Stillpoints created a lot of uneven, sometimes boomy bass. I find the soundstage blurred and transients too soft for my liking. Other than the bass it's pleasant but feels more like background music than live music to me.
Different strokes for different folks I guess.
I've been following this thread since the beginning and given the near-universal praise for these Ultra 5 Stillpoints, I accepted the offer to try a set in my system. An audio buddy bought six at an audio show and suggested that I take them home and try them under my speakers. They make a positive difference in his system so I had high expectations. I installed three Ultra 5s under each of my Magico Mini 2s.
There has been so much hype about this product on the net, that I almost hesitate to offer a differing opinion, but this is what I learned. I've been listening for a few days and had them in and out of the system three times. I clearly hear a difference, but as with a lot of stuff, I needed some time to understand how they were altering the sound. I listened to the following LPs:
1. Sonny Rollins, Way out West
2. Vivaldi, Concerto for two Mandolins
3. Mozart, solo piano
4. Muddy Waters, Folk Singer 45 RPM
5. Brahms, Double concerto, Cello and Violin
6. Rachmaninoff, Symphonic Dances
7. Sheffield, Drum Track LP
The first thing I noticed was an enhanced mid range presentation. Vocals and strings seemed more beautiful. There seemed to be more spacial information and greater depth to the soundstage. Piano decays were longer. But the more I listened, the more I noticed that this enhanced tonal emphasis came at the expense of the extreme frequencies, both the mid bass (not much deep bass with my Minis) and the upper treble. The tonal balance was less neutral than before.
Struck cymbals did not seem as clear. Bass did not have as much weight and impact. Then this morning, I played the Rachmaninoff and Sheffield drums. I did not hear as much leading edge attack or clean transients. When I removed the Stillpoints from the system, dynamics, leading edge, mid bass weight and impact all returned. The Drum Track, which is an acid test for system dynamics, sounded great again. Clear, fast and ultra dynamic. Complex symphonic music regained the overall sense of clarity that was missing with the Stillpoints in place. Music was more vivid, clean, dynamic and present again. And tonal balance was more neutral, because the midrange was no longer emphasized at the expense of the bass and treble.
Some of the listening I did by myself, but last night and today, I had two audio buddies join me. One was the guy who let me borrow the Stillpoints. The other is a guy loves classical music and uses the BSO, as I do, as his reference. We share the mutual goal of accuracy in our respective systems. Both guys are members of this forum and may chime in on this thread. The Stillpoints definitely make the other system in which I heard them sound better, but my system, and all three of us agreed, sounds best without the Stillpoints.
I have a suspended wooden floor with a carpet in front of the speakers. There is a lolli-column under each speaker, so the floor does not move as much as it would without the extra support. The floor does slightly sing along with the speakers during very loud music so the decoupling effect of the Stillpoints may be responsible for giving the impression of greater depth and better spacial information, but with the Stillpoints in place, the speakers are not as grounded or connected to the floor and they must move on a microscopic level back and forth with the drivers. I think this is why we all three heard softer transients and less impactful bass and dynamics. With the Magico hard cone footers in place, it is very difficult to budge the 200 lb speakers. I certainly can not slide them. With the Stillpoints, the speakers could actually be slid around much easier. Also the top and bottom disk do move against each other. This is part of the design, but I think it allows slight movement as the speaker drivers move in and out, perhaps contributing to the slight blurring and softening of the sound.
Well, my experience with the Stillpoints is that they are a tweak which can be very effective in some systems. They definitely alter the sound of a system. In my system, they did some good things and some not so good things. On balance, I prefer the sound of the system without them. In my view, the Stillpoints are NOT a "no-brainer." They need to be listened to very critically, over time, and with a variety of music. System context is important. Some people like what they do more than others, and they are expensive.