Finally, high quality Schumann Resonator made in Indonesia. This kit is made by my colleague in Bandung, Indonesia.

For you who don’t know about Schumann related information, allow me to quote below from NASA.

What is a Schumann Resonance?
Believe it or not, the Earth behaves like an enormous electric circuit. The atmosphere is actually a weak conductor and if there were no sources of charge, its existing electric charge would diffuse away in about 10 minutes. There is a ‘cavity ‘defined by the surface of the Earth and the inner edge of the ionosphere 55 kilometers up. At any moment, the total charge residing in this cavity is 500,000 Coulombs. There is a vertical current flow between the ground and the ionosphere of 1 – 3 x 10^-12 Amperes per square meter. The resistance of the atmosphere is 200 Ohms. The voltage potential is 200,000 Volts. There are about 1000 lightning storms at any given moment worldwide. Each produces 0.5 to 1 Ampere and these collectively account for the measured current flow in the Earth’s ‘electromagnetic’ cavity.

The Schumann Resonances are quasi standing wave electromagnetic waves that exist in this cavity. Like waves on a spring, they are not present all the time, but have to be ‘excited’ to be observed. They are not caused by anything internal to the Earth, its crust or its core. They seem to be related to electrical activity in the atmosphere, particularly during times of intense lightning activity. They occur at several frequencies between 6 and 50 cycles per second; specifically 7.8, 14, 20, 26, 33, 39 and 45 Hertz, with a daily variation of about +/- 0.5 Hertz. So long as the properties of Earth’s electromagnetic cavity remains about the same, these frequencies remain the same. Presumably there is some change due to the solar sunspot cycle as the Earth’s ionosphere changes in response to the 11-year cycle of solar activity. Schumann resonances are most easily seen between 2000 and 2200 UT.

Given that the earth’s atmosphere carries a charge, a current and a voltage, it is not surprising to find such electromagnetic waves. The resonant properties of this terrestrial cavity were first predicted by the German physicist W. O. Schumann between 1952 and 1957, and first detected by Schumann and Konig in 1954. The first spectral representation of this phenomenon was prepared by Balser and Wagner in 1960. Much of the research in the last 20 years has been conducted by the Department of the Navy who investigate Extremely Low Frequency communication with submarines.

So what is the relationship between Schumann and audio?

I remembered quite some time ago, the first device to use this Schumann Resonance was Acoustic Revive with its RR-77. I tested it around 6 years ago. Quite amazing small expensive device, though. Not quite sure if there was any other device doing the same job, but that Acoustic Revive RR-77 was the first one that I knew.

It seems that by producing ultra low frequency 7.83 Hz – which is considered as Earth’s breathing tone – might benefit to our audio equipment and also the human itself.

When this Schumann Resonance is generated, it can neutralize the electromagnetic waves generated by electronic equipment. There are also some research related with relaxing effect for human when listening specific tone, including this 7.83 Hz one. You can easily search in Google or your other favorite search engine.

So now I got chance to test this local made, Schumann Resonator.



This kit will need 12 VDC power supply and has been tuned to 7.83 Hz (you can see some trimmer on the PCB, but better don’t touch it unless you know how to tweak this device). It’s quite simple. Just power it with typical 12 VDC power adapter (I used one for my old netbook, because typical laptop power adapter is 19 VDC). The PCB itself looks good and well designed.

It won’t take much time to realize the effect after I turn on this Schumann Resonator. The background turned darker, quieter. The resolution and micro dynamic are increasing. Separation between instruments are clearer. Although I don’t test it in ideal room configuration, but it seems the staging also improved. It’s not as dramatic like adding acoustic/diffuser treatment, but it does”alter” the room condition. This subject to be explored more later. Let me enjoy some more tracks first… 😉

It seems there are some more and more tweaking devices coming into this industry and yes, the audio world is getting more and more interesting!

Some more photos and more testing will be uploaded later. I’m too excited and want to share this first, so some of the photos which required editing will follow.

PS: I receive some messages asking how to buy the PCB of this Schumann Resonator. My friend is selling this product as complete/finish product, not kit nor PCB. The reason behind is it will require some testing and tuning process to make sure the frequency is correct and stable. To avoid any quality issue, therefore this will be sold as finish product only. Leave your message with email address on the comment below if you are interested, then my friend will contact you. Because of so many emails coming to me and I hardly able to pass to my colleague on time, finally my colleague decides to publish his email address here [email protected]. Feel free to contact him directly and purchase it.