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DIY amp for ESL headphones? - Page 2

post #16 of 19
4/11/11 at 8:27am

You certainly can use power transformers but they won't work as well as custom made audio transformers.  The difference in cost is huge so why not experiment.  I for one like the little box I made with PCB mount transformers and a self bias circuitry so you can use Stax off an iPhone with no external power source...


 

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post #17 of 19
4/11/11 at 1:31pm
Thread Starter 

spritzer: Have you tried an active bias with the same transformers - if you have, did you notice any differance in sound?

 

 

 

 

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post #18 of 19
4/12/11 at 1:33am
Thread Starter 

Forgot a question: -What ratio did you use on your transformers?

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post #19 of 19
4/12/11 at 8:41am

No difference if the SB bias is done correctly and you make sure the bias supply is never starved.  I used a 150V limiter and a voltage quadrupler. 

 

The transformers are 6V/230V with resistors to create the center taps. 

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