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Acoustic Revive RR-77, 777, 888 Schumann Generator

Love to hear from anyone about their experience with these devices.  Long story short, I have an RR-77 in my room.  Bought it off Audiogon about ten years ago.  Every once in a while I look at it and think to myself "stooopid".  So I turn it off... then back on... then off... then back on.  Then I leave it on because what it does is wild.  And it does wildly good things to the sound in the room. I have it positioned above 5', and off to the side in the room.  It's like an ECU tune on your already high performance engine.  It's like buying a chocolate from a storefront in Brugge, rather than a Godiva from your local mall.  

I've read the threads.  Looked over posts and reviews on the interwebs.  It works and anyone who says it's snake oil... whatevs.

Anyone ever compare iterations of this device?  77 vs. 777 vs. 888?  Any discernible improvements?

I have not delved into any other AR devices.  Anything particularly noteworthy?
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jperry
2,448 posts
 
Here is a good place to start

https://forum.audiogon.com/search/index?utf8=%E2%9C%93&query=ACOUSTIC+REVIVE
roxy54's avatar
roxy54
7,982 posts
 
On the advice of member Mahgister, I purchased 2 units off of ebay about one year ago. Each one sits atop one of my speakers because that happened to be the recommended height. Yes, they have a definite sonic effect that is more than one dimensional, but simply put, it seems to remove some kind of subliminal noise within the music. The effect makes listening more relaxing and focused for me. I have not unplugged them since the day that I bought them.
The units that I bought are actually more powerful than the Acoustic Revive units. They were about $80.00 each. There are other units available for much less. 
ozzy's avatar
ozzy
7,464 posts
 
I own a RR77, 777, and a 888. When they are turned off the soundstage closes in somewhat. Hard to explain, hard to believe, but they are effective.

ozzy
millercarbon's avatar
millercarbon
12,531 posts
 
There’s a bunch of these on Amazon. They’re on basic printed circuit boards from as little as $13. Nobsound has the same PCB with a little acrylic lid for $50. The Acoustic Revive has the same PCB inside a much nicer looking but still cheap plastic case, $450. (Ted Denny takes the cake at more than twice that. But I'm sure his has a bigger power supply. It certainly looks the part.) It sure looks to me like these are all the exact same thing with the only difference being the power supplies. They all have a circuit, looks like it generates the frequency signal which then goes through a very long winding circuit trace that functions as a sort of rudimentary transmitter or transducer. Depending on whether its electrical or acoustic waves I guess. Some are round, some are square, they use batteries, wall warts, USB, but its all the same at the end of the day.

So what’s the deal with these things? I mean, besides they work. Too many reliable listeners saying they work to deny that. But what’s the deal? Can I really get the $13 board and go swimming in the all-enveloping sound stage?

What say you, resident expert mahgister? I’m buying and trying whatever you recommend. A link would be nice. Will this one do? https://www.ebay.com/itm/FM783-7-83HZ-Schumann-Wave-Ultra-low-Frequency-Pulse-Generator-Helping-Slee...

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