Ebay 15W class-a zero feedback modules?

[sharpi31]

Please can anyone who understands zero-feedback class-a amplifiers comment on the schematic shown here?

Ebay 15W zero-feedback class-a modules

Is this accurately described, on another ebay con...?

 

[poynton]

Beware ... !!!!

This Ebay seller is a well-known scam artist who takes your money and does not send the goods !!!!

Andy

 

[sharpi31]

Thanks for the warning. Bit confused though as he has 2045 transactions and 100% positive feedback (well greater than 99.5% as he has a few negatives but less than 0.5%...)

 

[tiefbassuebertr]

This circuit is a classical push pull power follower (source follower, unity gain, but not "zero feedback" design - only "zero negative feedback" design !!) without voltage gain stages.
To get more informations about the circuit please read the article "cool follower" from Andrea Ciuffoli - Home Page
http://www.audiodesignguide.com/my/index.html
I would prefer the "Power Follower 99" from the same author, also to find on this website and about
http://www.diyaudio.com/forums/showthread.php?threadid=8552

Please note, that there are no heatsink and no transformer regarded Item number: 120450912260. In additional there are no computer grade main electrolytic capacitors with screw terminals. That is the main reason for the ultra low cost for one pair of this auction

 

[sharpi31]

Without voltage gain, a high gain preamp like BOZ would be required?

Would a CRC power supply be required?