They appear out of nowhere, and disappear without saying goodbye. Yes, I'm talking about bass. More specifically, bass after your system has been "Seismion'ed".
I bought my first basic Seismion Reactio about 7 months ago for my Primary Control Kinea turntable. I've already been using a HRS platform. The improvement of moving from HRS to Seismion was unmistakeable: there was calm, poise, grace, with increased realism, dynamics, resolution, refinement, and an illusion of higher extension. Unpacking the sound traits, I realized the biggest benefactor has been the quality of bass (taut, agile, tactile, etc) which also brings significant benefit of achieving a clear and uncolored midrange and high frequency.
Before Seismion, I didn't know bass can sound this articulate (even airy), visceral, and yet so light on its feet (which pronounces the impact of bass when it appears). It is so pleasingly surprising when the bass appears out of nowhere, strikes you and disappears. I've been thinking about why. One uneducated theory I have is that: sound travels faster through hard surface than air; low frequency contributing to the vibration (bass in this case) travel through floor/wall reaches your components first (before reaching your ears) creating vibration induced distortion. When your equipments are protected from floor borne vibration, there's no warning that a bass frequency in music is about to appear, it just does.
I ended up ordering another Reactio to put under my Thomas Mayer silver phono and line preamp. The resulting improvement wasn't a case of diminishing return, rather equally additive. It's not one of those improvements that you really appreciate once it's gone from your system. You notice it and appreciate it anytime you are playing music.
In the meantime, I tried few more isolation solutions from the more reasonable price Herbies, Gaia, to more expensive feet like Franc Audio Ceramic feet, Revopods, HRS, and CMS Ultra TT footers. I like all of these (except Gaia) in their own way. However, high end passive solution even the CMS TT has a color (in my system it was warm and musically forward under every equipment I tried). The overall delta of sound change could potentially be higher than using a Seismion but the sound change can either be positive or not so positive. With Seismion, one thing I'm quite certain is that it has no color of it's own. It will not change the tonality of your system and will bring improvements regardless of your equipments or vibration vulnerability of your listening enviornment.
Having completely sold on the efficacy of Seismion, I ordered the Reactio Plus. I was not a fan of the setup process tbh. I was also skeptical if the 3X better isolation would be audible (not to mention I live in a newly constructed building with concrete floor). Less than a minute into listening the first song with Reactio Plus under my TT, it was without a doubt more articulate, resolving, lively, yet calm and a clearer window into the music. My turntable, phono, line preamp, and monoblocks are all supported by Seismion, I'm hearing the most undistorted and pure music I've ever experienced at home.
I'd like to mention that a linear PSU is pretty much mandatory to get the best out of the Reactio platform. Although, Reactio only consume a handful watt, but the peak current consumption could be as high as 4A. This means you need a linear PSU with at least 48W instantaneous power capability. The quality of DC power cable also makes a difference.
Criticism? I actually like the no-frills utilitarian look of Reactio. It's not meant to be visually striking and helps to blend in whatever system you've. However, I do not like the stock footers. It feels like an afterthought. And finally, I wasn't a fan of the Reactio Plus setup. It's not difficult but tedious, having to load the platform with your heavy equipment, take it off, flip the platform to access the bottom screw, and repeat etc. Thankfully, you'd only have to do it once.
I'd like to thank
@JEB42 for his wonderful customer support. Also, Marcus at
@Seismion for creating such a high quality and effective product, and answering all my questions when I was one the fence before buying the first Reactio.
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