Hello All, Sorry for the late answer (work and time-difference)
Zilplex consist off:
Three legs (a reversed tripod) holding a silver cup (about 0.5 inch 12.5 mm). This all is fitted on a Plexiglas triangle (0.8 * 0.8 inch 20*20 mm) which you can stick to the wall. There is also a possibility to stick this to the ceiling and or floor. The benefits are that they are small and immediately working. Only for the bass modules the thickness of the reversed tripod legs are different, the silver cups are all the same. I do use 11 of them: 7 behind the speakers, 2 left and right aside the listening position, 1 behind the listening position and 1 on the ceiling. The main effect is that the walls are disappearing. We think that the cups are triggered by the sound and resonating in a higher frequency and interfering again with the lower audible frequencies and this time delay creates a feeling of
what? Space perhaps? The brain is fooled I guess in a positive way, the room becomes bigger and easier with sound. Articulation with voices (real humans and television etc.) is much better and the room is more silence. I use this for two years now and was very skeptical in the beginning. But after many demonstrations I was convinced and did try it by myself. The sound situation (without the resonators) must be in good order
. the Zilplex cant do wonders. The effort with zilplex and the Avalons was bigger then with the Contrivas, thats perhaps because I did use the same position. When the Contrivas arrived, the cups where not placed and I just want to get used to the Contrivas before I try different positions. There are many people (individuals and dealers, at home and at shows) who use them here in Europe, but the audiogon member Wiebe does not have a website and makes them all by hand.
Further: Contrivas are a real easy load for the Atma Sphere: I did try them with only half of the tubes installed (MA1 to MA50 ( MA60 ).
Halving the output and doubling the impedance and there was no real difference, except for the smaller macro dynamics and bass stability and then only when playing loud
..
Regards
Robert