Studio Series Headphone Amplifier construction thread

[cowanaudio]

I have a blue shield after my user name now

Good stuff👍. I also enjoy giving back to a community that I get a lot of pleasure from.

 

[jamesfeline]

How is it "Studio"? Whats special?

//

Nothing really
Just a good thought out layout - its just a name
I like the PCB layout and it sounds nice

 

[jamesfeline]

ok nearly complete just waiting for some screened cable to arrive then can do a listing test and start to test some different op amps
so first op amp test the OPA2134PA -

 

[jamesfeline]

I have added a better earth connection to connect to the earth lift PCB, might make this switchable next time

1 - direct earth
2 - open connection
3 - connection via earth lift PCB

 

[jamesfeline]

Regarding the test chassis I order a 3mm thick Aluminium sheets laser cut to any size that I need (online)
this then forms a basic layout / test bench prototype before committing to a final expensive case build, I find this useful and the ability to test built boards in the future

 

[cowanaudio]

That will get you started. Will you be taking any measurements of the results with the various opamps, specifically distortion? Testing with a CRO to look for instability will be beneficial too.

What performance metrics are you hoping to improve on compared to the original design?

 

[Netlist]

Very, very nice, you are a skilled builder.

Hugo

 

[jamesfeline]

Hello Hugo
Many thanks for your kind comments greatly appreciated

 

[jamesfeline]

Hello

Last pics now all is complete can you believe I cant find my head phones

 

[jamesfeline]

I will start the first op amp test once I find my head phones and sort out the music source
will probably be PC based using J River media

https://www.jriver.com/

 

[jamesfeline]

just putting this out there
this unit may be for sale .. what do you think would be a fair price

 

[jamesfeline]

plus remote control included