How can Acoustic Revive RR-888 produce 7.83hz?

I have the RR- 888 and it does make a difference 

It could make a difference with cheaper devices also...

I own 12 chinese 10 bucks one, some others few bucks more, around my room....It cost me many times less than ONE Acoustic Revive device...

This S.G. grid add an atmosphere around each instruments and a more encompassing " listener envelopment" impression ... I use also  ionizers with great success... This ionizers are way less well known for their audible effect, more subtle than S.G. but anyway it is audible and impossible to disconnect them when you are used to them with  S.G.

If temperature change affect room acoustic ionizer too...

BUT in a bad room untreated and un controlled or /and with a system wrongfully matched few people will hear NOTHING and will claim that this is snake oil for sure....All around audio threads...

😁😊

Does anyone know why the RR-888 cost as much as it does? Is it putting out more wattage? Is it in the materials? 

@linden56  Here are some others.

I've used the Chartres resonators, used singly, multiples, different power supplies, many placements in room. They do change sound staging and imaging to some extent, whether good, bad or indifferent up to you.