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PostPosted: 01 Jan 2009, 17:19 
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Joined: 01 Jan 2009, 17:08
Posts: 1
I collect CDs and consider my Sony CD player as my source. I would like to build an amp for my Grado head phones to see if it would sound better than the amp I have now. The phone plug on the CD player is weak on the bass so I figure to plug into the output in the back. Could I plug in directly? The impedance is 10k so maybe use a 10k pot and slowly dial up a little voltage so I could listen to the CD output before an amp gets a hold of it? Make sense? What would you do if you wanted to listen to the raw output of your CD player?


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PostPosted: 01 Jan 2009, 18:07 
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Joined: 06 Jun 2008, 20:12
Posts: 972
Location: Houston, TX
Using a potentiometer between your CD player and your amp is fine. Lots of us do that instead of an active PreAmp. Its okay. However, I have never used headphones anywhere other than a walkman and the amount of power to drive them might even be less than your CDP puts out so wait and I am sure someone like Gio who has built a few headphone amps will chime in on this thread. There are many headphone amps in the DIY Audio PROJECTS section of the site so while you wait, if you are, you can check out some designs and outcomes there.
Raw output from the CDP I am also unsure of.
Ri

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PostPosted: 01 Jan 2009, 21:48 
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Joined: 28 May 2008, 21:53
Posts: 4579
Location: Winnipeg, CANADA
Hi audiobooks. Welcome to the forum.

The output of a CDP will not be able to drive the phones very well .. it wants a 10k load and your Grado's ar likely 32 ohms.

My onboard headphone amps suck and my simple CMoy headphone amp was a huge improvement.

Here are a few more headphone ideas:
Hope this helps get you started.
Cheers,
Gio

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