I have one. Bought it some years ago. I've tried it in a couple different rooms, with different placements within each room. It appears to work better positioned higher off the floor and in closer proximity to the listener. I ultimately found that I did not like the effect- which seemed to homogenize the sound and take off some of the raw, more visceral aspects of sound reproduction. Other people at the time (it's been a while) never noticed any difference when I would switch it in and out. I'm not sure it is entirely psychological, I actually felt somewhat nauseous when I ran it the first few times. I think it does something, but I can't explain it and wouldn't try to--
I still have it, mounted on a stand at height in proximity to center chair listening position. But have not turned it on in quite a while. Is it even made any more?
(PS: I know all the above sounds like crazy "snake oil" and I'm not usually a buyer of such things but I wanted to try it after reading some positives about it).
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I have three Schumann resonators, tried all manner of power cords, lps, positioning, number used, intensity of each. These do have effect on sound staging/imaging. I preferred high placement, as with whart away from system. Most noticeable effect was to 'pull' sound stage toward the resonator, best placement using three was up high behind listening position, one in middle, the others rear corners, although in my case no rear wall, listening room opens into kitchen. Over time I slowly eliminated both numbers used and intensity of each. Issue for me was something 'artificial' in the sense sound stage overly focused, individual performers/images didn't have natural placement on sound stage, excessively individualized. For me a combination of strategically placed RPG Skyline and Synergistic HFT have more natural image placement on sound stage. I never heard an increase in resolution/transparency with these, one of the claims for these devices.
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I've been using two for about 4 years, a little below tweeter height, and I like the effect. It seems to calm and clarify to me.
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I’ve been using two Schuman resonators (one atop each speaker) and a box of Synergistic Research HFTs strategically placed around my listening room for years. I had serious doubts regarding the effectiveness of the HFTs since my listening room is heavily treated. I am glad that I was wrong. Still use a FEQ as well.
I’ve tried many tweaks through the years.
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Thanks for all the info. Really appreciated.
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Do two make any difference vs one? When you operate two, are they connected in some way as to be in phase with each other? If they are in phase, does that matter, and how? Is this a subsonic "noise" reduction system?
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For a few years, I’ve had a pair in a 3000 cubic ft sound treated room. Their positive impact is on the size of the sound stage — not the SQ. It’s subtle but genuine to me. Best detected by listening with the resonators off vs on. They’re mounted in corners on a horizontal plane projecting several feet above my listening spot. I would purchase them again, but after addressing more pedestrian issues like speaker position.
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I did use the SR's for a number of years with success, its only as my system improved and other treatments tried did i become less enamored of them. As for numbers of them, a single would generally be used centered between speakers, best positioning, up near ceiling behind listening position. When I used two, they went up high in rear corners behind listening position. Three, two remained in corners, third in center positioned as previously mentioned. Comparing the three, a single centered can be all one needs, using two in back corners the least favored, left a hole in center image, pulling side sound stage forward, middle recessed. using three brings entire SS forward, can be too much in face presentation. You can adjust how much ss pulled forward by varying intensity/volume knob. I also used a single somewhat satisfactorily placed on front wall near ceiling between the loudspeakers, this raised the SS although over time found this to be artificial sounding. This my problem with the SR's in general, don't present SS in a 'natural' manner, forces SS in the direction of them, even using lowest intensity setting always congealed SS to some degree. This could be phasing issue, perhaps different frequencies respond to SR to varying degrees.
Theoretically these are indeed subsonic 'noise' reduction devices. I never detected any added resolution/transparency with them, likely NR at such low freq doesn't affect freq we can hear.
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SNS, I’ve never seen a variable output with the Acoustic Revive 888. What’s up with that?
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@wfowenmd Mine were sold as loaded circuit boards, no enclosures or power supply. These came with pots in order to adjust intensity. You can find them on ebay, these are the Chartres brand.
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Weird and more than a little creepy.
Not sure I would take the plunge, regardless of favourable reviews.
If I want to alter my reality, I think I will stick with a nice red wine.
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I owned the Acoustic RR-888, RR 777 and the RR 77 for years. And to me, they made the soundstage seem to be larger. Through the years I have changed components and speakers, but I never moved the Acoustic Revive items, until recently...
As I removed the Acoustic Revive units (now with my present setup), I did not notice any change. Perhaps it's because I now have Planar type speakers and room treatment is not as important as with previous box speakers,
I ended up selling them all and frankly don't miss them.
ozzy
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I stumbled across this thread a few days ago, did a bunch of internet reading guided by AI and thought what the heck, bought the $55 Douk Audio wood box version vs the $$$ audiophile unit. It arrived today, plugged it in, 5 feet high just slightly left behind the speakers. And…when I switch on/off in quick comparison “I don’t think that I think I can tell a difference.” Nothing really in a quick A/B comparison.
HOWEVER, for some reason I do like the music with it on vs off. My system is not super expensive, but I’ve got speaker placement dialed in, big tube amp driving Klipschorns with superb imaging and soundstage. Damn, my rig sure sounds good tonight! Rich, lush detail, sparkling highs, superb midrange vocals, instrument separation and location but in a coherent way. Live recordings with audience clapping sounds like I’m in the middle of them.
Snake oil, placebo effect, science, or whatever…I definitely like it on vs off!
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