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Headphone Power Amp Adapter! (Read 806 times)
4krow
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Headphone Power Amp Adapter!
11/24/17 at 23:37:29
 
 Just now, in my favorite coffee shop, and idea sprang loose from my brain. I was reading about headphone amplifiers of all kinds. Of course, I have a favorite in my own rack, BUT then an idea came about. I already know that the Rachel is an excellent choice for such service. The 'challenge' would be to try different arrangements of resistors for the best load to the amp, and the least fatal to the headphone. Sound quality is at the peak of it all somewhere. Now, here is the idea that I am going to float soon enough:
   Instead of finding the right combination of resistors, I will be using a Decware Audio "Gizmo" for the connections. I have kept these babies around for years, just to use in such instances. Great for experimentation, and in this case, I am hoping for a revelation.
 More to follow......
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: Headphone Power Amp Adapter!
Reply #1 - 11/25/17 at 04:55:32
 
Front w/headphone jack:

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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: Headphone Power Amp Adapter!
Reply #2 - 11/25/17 at 04:57:02
 
Last shot. I used silver plated binding posts that accept wire up to 16 gauge.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: Headphone Power Amp Adapter!
Reply #3 - 11/25/17 at 05:12:33
 
Close up of transformer model. It was designed for use with such speakers as Fostex to help with a midrange problem, but may well work in this case also since it is adjustable. We'll see soon enough.

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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Posts: 960
Re: Headphone Power Amp Adapter!
Reply #4 - 11/27/17 at 00:17:05
 
Ok, got her up and running. I hooked up the transformers' primary winding -Across- the amp output, giving the amp a load. Then I placed 50 ohm resistors in series with each channel. The headphones sound great, and I can even use the potentiometer to adjust for my brighter sounding Grado cans. This idea is a keeper.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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