PASS DIY Headphone Amp - WHAMMY
Oct 15, 2019 at 3:46 AM Post #151 of 204

gaz2613

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The OPA2107's are out of this world. Biggest soundstage I've heard so far without compromising detail, clarity, and most of all punch. There seems to be an improvement in bass as well. Wow, truly truly stunning! Like the LM833N it has warmth and is very immersive. Favorite so far!

I thought you would like that one. Also a really nice one is the Analog Devices AD746JNZ. You will not be disappointed. :)
 
Oct 15, 2019 at 12:56 PM Post #152 of 204

Jimmy24

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I will be sure to check that one out :) So far the OPA2107's make HD 650's sound like HD 800's but with more warmth and bass without it being analytical. Clarity here so lifelike! Too good!!!
 
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Oct 17, 2019 at 10:06 AM Post #153 of 204

Allanmarcus

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Finally done with the Wood WHAMMY! Here are the pics:

9941473_l.jpg

9941474_l.jpg

9941475_l.jpg

9941476_l.jpg

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I'll add some rubber feet tonight, and it's done. I love it. Now come opamp rolling. It runs very cool.
 
Oct 17, 2019 at 8:15 PM Post #155 of 204

nerone

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Finally done with the Wood WHAMMY! Here are the pics:

9941473_l.jpg

9941474_l.jpg

9941475_l.jpg

9941476_l.jpg

9941477_l.jpg


9941478_l.jpg



I'll add some rubber feet tonight, and it's done. I love it. Now come opamp rolling. It runs very cool.

Only one very minor thing to achieve perfection: change the screws for black ones. Otherwise, great job.

Nice work there Allan! 15V is most definitely cooler than my 22V. I'm thinking of changing the transformer to 15V/18V to run cooler as I don't need that much voltage swing. Did you fabricate the wood yourself?

He said on another forum that he did. First with inexpensive wood then the final version.
 
Oct 17, 2019 at 9:33 PM Post #156 of 204

Allanmarcus

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Only one very minor thing to achieve perfection: change the screws for black ones. Otherwise, great job.
He said on another forum that he did. First with inexpensive wood then the final version.

I'd love to get black screws, but my local hardware store doesn't sell them. :frowning2:

yep, but to b clear, the cheap pine was $3 for the piece and the "expensive" wood was $12 for the piece.
 
Oct 17, 2019 at 9:50 PM Post #157 of 204

nerone

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I'd love to get black screws, but my local hardware store doesn't sell them. :frowning2:

yep, but to b clear, the cheap pine was $3 for the piece and the "expensive" wood was $12 for the piece.
See, 4x the original price, way more expensive. :ksc75smile:

I also want to build one whammy, and as I want to add some funcions, like a DAC, I want to build with the board sideways, with the the psu section on the back, pot on the side with extension shaft.
For a quick solution I'm thinking about a Dragonfly using the Neutrik USB connector, similar to the RCA's you used.
I was thinking about finding one box just like yours, as I don't have the space to do mine at home.

I'll keep searching for the right box.
 
Oct 18, 2019 at 9:36 AM Post #161 of 204

Allanmarcus

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Thanks. All great ideas. I'm done black paint before, and it works well. I sort of forgot about that simple solution. I'll probably just color the from two screws.

BTW, I didn't show it in the picture, but the power button on the front lights up blue (it is a Pass designed amp) when the power is on.

9941485_l.jpg
 
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Oct 19, 2019 at 3:44 PM Post #163 of 204

Allanmarcus

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Oct 19, 2019 at 4:56 PM Post #164 of 204

JamieMcC

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@Allanmarcus Just curious here. What sort of power tools are needed to fabricate woods and make panels like yours?

If your considering doing something like this keep an eye out in the home depot or home discount stores, for wood chopping boards or place mats when your shopping often you can get some really good deals on inexpensive wood options suitable for such builds. Ikea is a great source

I used a couple of $5 Bamboo chopping boards to make a matching turntable plinth and phono stage enclosure out of.

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Oct 27, 2019 at 3:39 AM Post #165 of 204

Jimmy24

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Has anyone here compared the Whammy to higher end amps? With a OPA2107 this beast is better than some $1K+amps I've heard before and not by a small margin either.
 

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