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power conditioner manufacturer on why cleaning Mhz noise is important


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https://www.lotusgroupusa.com/blog/whats-up-with-noise-reduction-in-the-megahertz-range-and-why-does-it-matter

 

I will note that this guy makes $15-$20K power conditioners. Hard for me to understand how such a device can cost so much. Even in audiophiledom with high end parts, seems like it should cost no more than a fraction of that.

Main listening (small home office):

Main setup: Surge protector +>Isol-8 Mini sub Axis Power Strip/Isolation>QuietPC Low Noise Server>Roon (Audiolense DRC)>Stack Audio Link II>Kii Control>Kii Three (on their own electric circuit) >GIK Room Treatments.

Secondary Path: Server with Audiolense RC>RPi4 or analog>Cayin iDAC6 MKII (tube mode) (XLR)>Kii Three .

Bedroom: SBTouch to Cambridge Soundworks Desktop Setup.
Living Room/Kitchen: Ropieee (RPi3b+ with touchscreen) + Schiit Modi3E to a pair of Morel Hogtalare. 

All absolute statements about audio are false :)

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I will only address this part of their advertising blurb.

 

Quote

So what happens when two frequencies in the megahertz range are within beating distance? They behave in exactly the same manner as two strings.

 

Signals in the megahertz range powerful enough to result in measurements like these are only likely to come from nearby A.M. radio stations which have a mandated separation in  Australia, and many other countries of 9kHz, and should not result in the LF beat notes as described, as their licences also require a very high high frequency stability. Likewise, FM Stereo transmissions in Australia in the 87.6mHz to 108mHZ are separated by 200kHz.

Shortwave AM radio transmissions have a separation of 5kHZ but there is virtually no chance of 2 Shortwave transmitters being located physically close enough to generate beat notes at any meaningful level.

 The RF/EMI from SMPS powered LED lighting etc. is more likely to cause problems than high powered Broadcast transmitters, and only locally at quite a low level which should be rejected by competent design.

Comments on this from qualified members such as Mansr are welcomed.

 

Alex

 

How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file.

PROFILE UPDATED 13-11-2020

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On 4/6/2019 at 10:04 PM, sandyk said:

I will only address this part of their advertising blurb.

 

 

Signals in the megahertz range powerful enough to result in measurements like these are only likely to come from nearby A.M. radio stations which have a mandated separation in  Australia, and many other countries of 9kHz, and should not result in the LF beat notes as described, as their licences also require a very high high frequency stability. Likewise, FM Stereo transmissions in Australia in the 87.6mHz to 108mHZ are separated by 200kHz.

Shortwave AM radio transmissions have a separation of 5kHZ but there is virtually no chance of 2 Shortwave transmitters being located physically close enough to generate beat notes at any meaningful level.

 The RF/EMI from SMPS powered LED lighting etc. is more likely to cause problems than high powered Broadcast transmitters, and only locally at quite a low level which should be rejected by competent design.

Comments on this from qualified members such as Mansr are welcomed.

 

Alex

Alex is quite correct here. This is another case of a  seller “inventing” a problem for his product to solve. Yeah, it’s conceivable that this could happen, but it’s not very likely. And if your audio equipment can’t filter this problem out of your mains supply on its own, then a decent one-to-one isolation transformer for a couple of hundred bucks (or less, depending on how big it needs to be for your purposes) should certainly be sufficient to block frequencies that high from getting past it in the first place.

George

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