[abraham]

I have a pair of HD-600, but no headphone amp yet. I saw in a FAQ that you can use your poweramp to drive headphones. Can someone give me a step-by-step of how to do this? I have almost no experience with electronics (only soldered a few things together), so please keep it simple.

Abraham

 

[Tomo]

Hello,

Probably that isn't good idea especially since you are using HD600, the king of dynamic headphones that cost "kingly" as well. So I don't recommend ... however, if you so wish here goes.


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R1, R2, R2/(R+R2)

6.8 1.2 0.15

6.2 1.8 0.23

5.6 2.4 0.30

4.7 3.3 0.41

3.3 4.7 0.59

2.4 5.6 0.70

1.8 6.2 0.78

1.2 6.8 0.85

Note that R1+R2=8ohms. This matches the output impedance of your speaker amp. Note also, that excess power from your amp will be dissipated by these resistors, so use power resistors 3~5W resistors. Author comments that lower the value of R2/(R1+R2) will result in lower noise level, but that will increase distortion.
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I am quoting from Evolving Power Amplifier (http://www.ne.jp/asahi/evo/amp/index.htm). It's in Japanese but it's really detailed and informative. I wish the guy translates the site some day for us.

Tomo

 

[Gman]

It seems to me(being a Tubehead and all) that a pair of transformers is what is called for.

http://www.divertech.com/uhcsignature.html

G