[dlaloum]

Hi Folks
 
I am no electronics wiz - but I received the attached circuit diagram from Onkyo today...
 
It shows the NE5532 based Headphone amp circuit.
 
There is a bundle of electronics knowledge in the Headfi braintrust....
 
so how about analysing this circuit and telling those of us who can't tell north from south on this map what the implications are?
 
What does it tell us about this amp?
 
Based on the diagram what kind of amp would we expect?
Impedance?
Driving ability?
 
Input appreciated (as I am one of the ones who cannot tell north from south....)
 
bye for now

David

 

[dlaloum]

Did some more research...
 
the circuit has close family resemblance to:
 
Rod Elliott ESP amp :
http://sound.westhost.com/project113.htm
 
Unknown Author design - with opamp rolling info:
http://www.iroel.org/2010/03/16/headphone-amplifier-circuit-using-op-amp/
 
Earle Eaton Headphone amp:
http://www.audioattic.de/projects/eaton.html
http://gilmore2.chem.northwestern.edu/projects/showfile.php?file=eaton_prj.htm
 
Based on the comments attached to these designs it should be a good all round design, very quiet, not great with low imp phones, best with 120ohm+ - may have trouble driving 600ohm....
 
I would still love to hear the opinion of someone who can read these circuit diagrams ....
 
thanks
 
David