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Class D Switching Power Amplifiers and Power D/A conversion

Counterfeit Amps?
Counterfeit Amps?
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Old 14th July 2019, 10:05 AM   #31
mcdull is offline mcdull  United States
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Join Date: Aug 2015
Quote:
Originally Posted by rich1051414 View Post
Amazon and ebay aren't the same thing. Just anyone can't sell things on amazon, the extra headache and hoops to jump through keeps out a lot of riff raff. I have no doubt it's the real thing, amazon, unlike specialized retailers, can afford to have competitive prices.
I sell various stuffs on ebay and Amazon and pretty much anyone can sell things on Amazon.
I have some friends who are bigger sellers importing and selling on both ebay and Amazon said they have better sales at Amazon (but much higher fee) because many people thought buying from Amazon is better, some buyers didn't even realize they bought from 3rd parties.

Last edited by mcdull; 14th July 2019 at 10:08 AM.
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Old 14th July 2019, 09:30 PM   #32
rich1051414 is offline rich1051414
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Join Date: Sep 2018
Quote:
Originally Posted by mcdull View Post
I sell various stuffs on ebay and Amazon and pretty much anyone can sell things on Amazon.
I have some friends who are bigger sellers importing and selling on both ebay and Amazon said they have better sales at Amazon (but much higher fee) because many people thought buying from Amazon is better, some buyers didn't even realize they bought from 3rd parties.
I understood they had much stricter policies placed on sellers so that scammers are less likely to use the platform. Not that it really matters, with the recent lawsuit, I am suspecting 3rd party sells might be phased out anyway.
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Old 17th July 2019, 05:09 PM   #33
Bare is offline Bare  Canada
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Location: vancouver
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Originally Posted by ICG View Post
It is very rare a complete amp is faked. Cheap copys (which copy the circuit but are distinguishable), yes, faked chips, yes. A close to 1:1 fake? Unlikely since the manufacturer would very quickly notice it and intervene. Impossible? No, of course not.
Reality is a bit different tho.
Benz built a 'factory' en Chine because there was one building credible 'Copy' Mercedes in operation.
BMW built a Motorcycle factory for the exact same reason.
Currently there are allegedly 3 separate factories building fake BMW's .
Ditto for Yamaha .
Likely dozens more examples but those few should provide a reasonable vignette?

Some arcane easy to build consumer audio toy is a walk in the park to copy.
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