Today I've posted a video on YouTube showing one of the failed PCBs for the Quattuor project working. This is not the final PCB, but one that failed to work (defective by design) and had to be rectified.

Watch the video:
http://www.youtube.com/watch?v=6x3XjE7RDsA

Enjoy!

 

Just curious, what is the motivation for this project? Audio amps and speakers are pretty common, but I suspect you are trying to work something out. Correct?

 

Nice work CS. Quattuor seems to be progressing well. For those that are interested, this project is featured here: http://forum.allaboutcircuits.com/showthread.php?t=9956

Dave

 

Just curious, what is the motivation for this project? Audio amps and speakers are pretty common, but I suspect you are trying to work something out. Correct?

Thanks for your interest, Bill. This project brings nothing now, actually, both in terms of topology or technology.

Nice work CS. Quattuor seems to be progressing well. For those that are interested, this project is featured here: http://forum.allaboutcircuits.com/showthread.php?t=9956

Dave

Thanks Dave. The final PCB was already assembled in June, and passed all tests with success. However, I took the liberty to repair both channels of this failed one, and now it is fully functional as well (being excessive gain the only problem with this PCB in particular). Here is the video on YouTube:
http://www.youtube.com/watch?v=_bRe3sQev8g

I will post some pictures of the final PCB as soon as possible!