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Death of Zen!

post #1 of 5
10/21/10 at 7:12pm
Thread Starter 

Just wondering if anyone has built the Elliot Sound "Death of Zen" Headphone amplifier.  I am considering the amp and have built several of his projects including a power amplifier, phono preamplifier and pre-amp.  The DofZ is Class A and should sound great.  

 

http://sound.westhost.com/project70.htm

 

Also, can one install a pot to control volume on this amplifier? 


Edited by Dubwicht - 10/21/10 at 7:14pm
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post #2 of 5
10/21/10 at 8:00pm
Quote:
Originally Posted by Dubwicht View Post

Just wondering if anyone has built the Elliot Sound "Death of Zen" Headphone amplifier.  I am considering the amp and have built several of his projects including a power amplifier, phono preamplifier and pre-amp.  The DofZ is Class A and should sound great.  

 

http://sound.westhost.com/project70.htm

 

Also, can one install a pot to control volume on this amplifier? 

 

I hope one of the other more experienced parties would chime in, but basically, you'd wire it right before the input of the amp.

 

Typically you have a pot prior amplification. This is why you see a lot of hub bub about higher end pots or even stepped attenuators, because it tends to operate on the signal at one of it's weakest points, prior amplification. So basically:

 

input -> Potentiometer -> amp -> output.
 


Edited by Aynjell - 10/21/10 at 8:01pm
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post #3 of 5
10/21/10 at 8:13pm
Thread Starter 

Thanks.  I am thinking about using a set of ALPS Blue Velvet 100k pots. I have had good luck with them in the past.  

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post #4 of 5
10/22/10 at 2:16am

You could try also mosfet in class a. I am satisfied with richard murdey's amp. It's so easy to built that could be great for a/b test.

 

http://gilmore2.chem.northwestern.edu/projects/showfile.php?file=murdey_prj.htm

 

Use 4k7 jfet source resistor for bf245b instead of 2k. And you can replace that big mosfet source resistor with lm317t.

 

I have built many opamp and bipolar amps but never was satisfied. This amp is easy for point to point test construction.

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post #5 of 5
10/23/10 at 1:32pm
Thread Starter 

Sounds like a great option.  I will consider it.  Thanks.  Doug

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