Ir with a bridged amplifier, use a differential probe at the speaker terminals. While you're at it, see if there's any difference between that and the amplifier output.Where was scope ground connected?? At amplifier signal ground, before 6m speaker cable? IMO, important is signal at speaker terminals...
Try to measure the same with no bridge amplifier, scope ground at speaker terminal ground..
Went into London today. It’s loud, brash and filled with lots of irascible folk. But the highlight was a guy in front of me in a BMW, window down, arm hanging out. His bass was so loud, I could see the trunk (rear boot in U.K. parlance) vibrating up and down. Next thing, a guy in a Audi SUV pulls up alongside, winds his window down and yells ‘you effing deaf or something- turn it down’. The BMW guy just wound his window up and drove off.
Ir with a bridged amplifier, use a differential probe at the speaker terminals. While you're at it, see if there's any difference between that and the amplifier output.
I just read PMA's post and my response doesn't appear to make sense in context of whatever was being measured. Never mind.
Scottjoplin: I am still not sure if these achievements are worth doing or not. However I know that efforts to suppress interferences of any kind are of some value, in listening.
Having heard a benefit to the noise floor after installing a good isolation transformer/line filter on my system I concur. I now specify them for all studio projects I design.
Cheers,
Howie
Seems we need more magical cure topics to keep discussion going on ;-). Fairy tales about textbook engineering approach etc. ;-)
I have to admit being intrigued, not least because the drawbacks can be huge when bridging, but right now I need another amplifier project like a hole in the head 🙂. Tom Christiansen has done a take on the bridged LM3886 amplifier, but wrapped in a composite as is his style. He didn't think it was work the effort until he did it. Meaurements are as ever superb if you can live with the limited current available and I know some believe real power amps should be able to dump 100A to be taken seriously 😀
stung by my bybee
Not even one comment on this. I am disappointed.
Nothing happened probably because that (by)bee sting is a blank as in fake ammo. 😀Not even one comment on this. I am disappointed.
Is it a sting that doesn't hurt, or not hurt, until someone collapses the wave function by believing in bybeeeees?
Not even one comment on this. I am disappointed.
Who failed to return the valuable commodity?
Is it a sting that doesn't hurt, or not hurt, until someone collapses the wave function by believing in bybeeeees?
No, that's observing a Bybee function collapses its wave function precluding any confirmation of the result.
Dan, in the Funniest snake oil theories thread you posted:
"Geoclense Geopathetic Stress and Electromagnetic Radiation Harmonizer - WiFi Harmonizer, Orgone Effects Australia (OEA)" Such an obvious, marked increase in bass should be trivial to measure and record. How about putting up some real evidence instead of the usual useless, unsubstantiated Just sayin' claims. Jeff PS Many of us here are decades aware of the Orgone scam. Orgone - Wikipedia "...pseudoscientific spiritual concept..."
View attachment 782353 I borrowed one of these Geoclense units from a friend of a friend. The intended purpose is to 'harmonise' the radiations from household wiring. Turns out when plugged into dual wall socket supplying any audio gear the sound changes with marked (resonant) increase in bass. Just sayin'. Dan.

"Geoclense Geopathetic Stress and Electromagnetic Radiation Harmonizer - WiFi Harmonizer, Orgone Effects Australia (OEA)" Such an obvious, marked increase in bass should be trivial to measure and record. How about putting up some real evidence instead of the usual useless, unsubstantiated Just sayin' claims. Jeff PS Many of us here are decades aware of the Orgone scam. Orgone - Wikipedia "...pseudoscientific spiritual concept..."
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Don't hold your breath. Or, he can EQ the bass output and record it, then claim that it is the cleansing device's doing. How will we know the legitimacy of it?Such an obvious,marked increase in bass should be trivial to measure and record.
How about putting up some real evidence instead of the usual useless, unsubstantiated Just sayin' claims.
Orgone Effects Australia (OEA)"
You wonder to yourself (your family having long since refused to travel with you) how you can rid your home and/or office of the negative effects of electromagnetic radiation while at the same time freeing your wallet of that burdensome $165 for which you have no useful purpose. Luckily, Orgone Effects Australia has the solution. Introducing: Geoclense.
I scanned through chapter 11 about losing hearing in one ear, so what ?. There are different modes of listening and with ease I can listen for enjoyment (the music) or listen critically (the system). In the music mode I don't care about the system and just enjoy, in the critical mode I listen for what is right and what is wrong, ie what does not belong and is artifact of distortions, embellishments or omissions (DEO) Natural music and especially spoken word is very useful for this and DEO's directly affect/effect intelligibility and realism including spatial cues. Youtube reviews usually contain time links or by running two windows and rapid switching (alt+tab) I can alternate between videos and compare items under test and listen for DEO's that change, the actual sound quality of the recording is not mission critical except that better recordings more clearly capture differences......I have no doubt these things are in your mind. However before you attribute them to external stimulus, if you have not already please read Musicophilia by Dr. Oliver Sacks:
For real ?......Howie, I respect your experience but you mean in all your career you have not tried such power treatment, 'you cannot be serious' comes to mind. Perhaps now that you have clean power you are in position to discern differences in power and signal cables or other 'tweaks' now that one disbelief system has gone out the window, congratulations on gaining new awareness that power quality matters.Having heard a benefit to the noise floor after installing a good isolation transformer/line filter on my system I concur. I now specify them for all studio projects I design.
Dan.
So go ahead and define and name 'well designed equipment' that is totally immune to AC supply longitudinal leakage and internal psu/earthing issues. 'Pro' audio gear AC power and earthing arrangements and psu regulation are typically no different to/better than decent hi-fi gear and that includes plenty of 'consumer' gear too so the concept that 'pro' gear is inherently 'well designed' has no weight in most cases, and is in fact a total furphy.Only for poorly designed equipment. His statement in no way substantiates your nonsense.
IME I am yet to audition any item of audio gear that does not change when fed isolated and filtered power and that includes two wire devices not connected to anything else, eg radio/radio cassette, BT speaker etc. I am not bagging Howie in any way, I am just really surprised that Howie has only now tried the isolation/filtering experiment/audition despite being in audio electronics for a life time like many of us here.
Howie, welcome to the dark side. 🙂Having heard a benefit to the noise floor after installing a good isolation transformer/line filter on my system I concur. I now specify them for all studio projects I design.
Dan.
For real ?......Howie, I respect your experience but you mean in all your career you have not tried such power treatment, 'you cannot be serious' comes to mind.
Perhaps now that you have clean power you are in position to discern differences in power and signal cables or other 'tweaks' now that one disbelief system has gone out the window, congratulations on gaining new awareness that power quality matters.
Dan.
Wow, that is so disrespectful. With all his years of radio and studio experience, and all the accomplishments he has documented here, are you really so arrogant that you would take that tone with Howie?
He said he specs isolation transformers for all his studio projects, did you take him to mean he started last week? How many isolation transformers do you use in your home?
You brag about hearing differences between identical files through the built in speaker on your phone, and evaluating cables on YouTube, but you presume to tell H. Hoyt that his systems aren't good enough?
Jeff, I am soon to make up some cables so that I can 'probe' the signal across speaker inputs and go from there, and yes I agree that the differences should be captureable.Such an obvious, marked increase in bass should be trivial to measure and record.
How about putting up some real evidence instead of the usual useless, unsubstantiated Just sayin' claims.
I posted a Dropbox link yesterday of loopback recordings where the only change is additions to the loopback cable, if you were to take a close listen to those you might gain understanding of the kinds of changes that I am describing.
Name a short track or excerpt and I will try capturing the sound of the Geoclense in addition to different loopback cable and other materials including ferrite.
One big difference that most listeners are not experienced in is being able to repetitively fast switch differences and from this gain understanding of how system sound can be changed subtly, predictably, repeatably, reliably and at will.
One training aid is the Dropbox files, another training aid would be to try a range of ferrite snapon filters.....with enough ABABAB.... etc repetitions you ought to be able to notice a fine difference which becomes more obvious/recognisable with suitable trialing which includes various program and various gear.
Jeff, once you have mastered that there is a distinctly limited set of suitable elements and compounds to 'audition', go to it.
Regarding the Orgone and ilk subjects there is indeed a lot of nonsense 'explanation' perpetrated by such 'pseudo science' peddlers, including the Geoclense site, however there is substance to some observations and I say there is more to energy transfer/EMR and than meets the eye on first inspection and this includes effects on behaviours of machinery and biology.
Dan.
y, I am just really surprised that Howie has only now tried the isolation/filtering experiment/audition despite being in audio electronics for a life time like many of us here.
Howie, welcome to the dark side. 🙂
Dan.
I know Howie has used such for quit awhile. i helped him get the schematic to a Monster --7000 unit when it needed repair. Fortunately, that design is back in production again. Too many people asked for it as nothing equal or better exists to replace it. 🙂 IMHO naturally
THx-RNMarsh
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