Stein Blue Sun


Blue Suns
While developing the Blue Suns our initial intention was to build something for the use in concert halls. The result in the end was a smooth sounding top class device, which you directly hear and do not want to miss any more. The soundstage gets 3- dimensional, not only at the listening place but all over the room. Musicians become a presence unknown before and appear in your room stunningly real.


Passive Crystal Array specifically aligned to enhance air movement with sound.

Read reviews and other documentation available on the web.


Holger Stein, the man behind Stein Music has some understanding of quantum physics and advanced engineering. His passion for music has enabled him to create a range of rather unique and interesting products like his Stein Harmonizers, Speaker Match and E-Pads. Stein’s goal is aimed at helping audiophiles achieve a more rewarding experience of their music systems. In my conversations with Stein he never attempted to hype or sell his products. He respects the work of other top designers and I always feel his enthusiasm and his sincerity.

This past winter, I was delighted to have Stein visit my New York home. He was carrying a small briefcase that held one of his latest new passive room tuning devices he calls the Stein Audio Blue Sun. These shiny hockey puck-like devices, like his other mysterious Stones are said to enhance the musical realism in a high-end audio system by merely placing them on your listening room walls. Made by a mix of the specially designed crystals contained in a carbon filled epoxy resin, a single Blue Sun is about six times more power than the Blue Diamond: his previous top of the line passive tuning device (which are terrific on their own!).

One would call it a tweak but that’s deceptive.

Stein products lie a bit further out on the fringes of our hobby and as a result haven’t been considered as important as conventional audio components like upgrading to a better amp, Dac, speakers, interconnect cables, power cords, sound absorption panels, or support feet, etc. These are the more accepted methods for improving an audio system’s musicality. But Stein not only creates so-called conventional products like loudspeakers, amps and phono cartridges, he also creates interesting devices that alter the way sound waves interact with the oxygen. You know the stuff that keeps us alive.

Air is more complex than I realized, according to Wikipedia air is composed mainly of nitrogen, secondly oxygen and an assortment of about 15 sub-factors. Stein‚Äôs theory and approach involves quantum physics. He uses precision cut crystals arranged in exact configurations putting out fields that allow these sound waves from our loudspeakers and through air molecules with less resistance. This, Stein purports, sets off a cascade of improvements in how we perceive sound. The Blue Sun are designed to either work solo or in conjunction with the Stein Harmonizers. Originally reviewed (here) back in 2011 by Clement Perry, the Blue Sun is an example of Stein’s newest devices that claim to push the sonic boundaries even further. Holger Stein’s newest Blue Sun, the subject of this review, is the newest addition to the Harmonizer family of products that include Black Stones, Black Diamonds and Blue Diamonds. The Blue Suns however employ the latest technology designed to further increase the power of the Stein Harmonizers. Read More