<?xml version="1.0" encoding="UTF-8" ?><!-- generator=Zoho Sites --><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><atom:link href="https://www.muffsy.com/blogs/tag/koss/feed" rel="self" type="application/rss+xml"/><title>Muffsy Phono Kits - Articles #koss</title><description>Muffsy Phono Kits - Articles #koss</description><link>https://www.muffsy.com/blogs/tag/koss</link><lastBuildDate>Fri, 05 Jul 2024 03:46:57 -0700</lastBuildDate><generator>http://zoho.com/sites/</generator><item><title><![CDATA[Side Project: Nwavguy's O2 Headphone Amplifier]]></title><link>https://www.muffsy.com/blogs/post/Side-Project-Nwavguys-O2-Headphone-Amplifier</link><description><![CDATA[<img align="left" hspace="5" src="https://www.muffsy.com/files/pcbs.jpg"/>I've been getting my new hobby room ready, and I knew I needed some kind of stereo system in there. Preferably one that didn't annoy others in the hou ]]></description><content:encoded><![CDATA[<div class="zpcontent-container blogpost-container "><div data-element-id="elm_meY3DeXxSGG_8evASe2iJQ" data-element-type="section" class="zpsection "><style type="text/css"></style><div class="zpcontainer"><div data-element-id="elm_xUcPI3DbQaua1U1PGFpOag" data-element-type="row" class="zprow zpalign-items- zpjustify-content- "><style type="text/css"></style><div data-element-id="elm_K7NVsL9VT1qYXgIClwSadA" data-element-type="column" class="zpelem-col zpcol-12 zpcol-md-12 zpcol-sm-12 zpalign-self- "><style type="text/css"></style><div data-element-id="elm_Yg0a0fhnS4mgxFzq-xqTqw" data-element-type="text" class="zpelement zpelem-text "><style></style><div class="zptext zptext-align- " data-editor="true"><div><p>I've been getting my new hobby room ready, and I knew I needed some kind of stereo system in there. Preferably one that didn't annoy others in the house, so I ended up ordering <a alt="PCBs from Nwavguy's gerber files" href="http://nwavguy.blogspot.se/2011/08/o2-details.html" target="_blank" title="PCBs from Nwavguy's gerber files">PCBs from Nwavguy's gerber files</a>. Yup, I'm gonna use headphones. :)</p></div></div>
</div><div data-element-id="elm_1xnfA37TTiq2s_Mq1jJyNg" data-element-type="image" class="zpelement zpelem-image "><style></style><div data-caption-color="" data-size-tablet="" data-size-mobile="" data-align="" data-tablet-image-separate="" data-mobile-image-separate="" class="zpimage-container zpimage-align- zpimage-size-original zpimage-tablet-fallback-original zpimage-mobile-fallback-original hb-lightbox " data-lightbox-options="
                type:fullscreen,
                theme:dark"><figure role="none" class="zpimage-data-ref"><a class="zpimage-anchor" style="cursor:pointer;" href="javascript:;"><picture><img class="zpimage zpimage-style-none zpimage-space-none " src="/files/pcbs.jpg" size="original" alt="White o2 headphone amp PCBs" title="White o2 headphone amp PCBs" data-lightbox="true"/></picture></a><figcaption class="zpimage-caption zpimage-caption-align-center"><span class="zpimage-caption-content"></span></figcaption></figure></div>
</div><div data-element-id="elm_Qu1izdR1TU6uAJ9QkZceZQ" data-element-type="text" class="zpelement zpelem-text "><style></style><div class="zptext zptext-align- " data-editor="true"><div><p>The components that I didn't have at home were ordered from <a alt="DigiKey" href="https://www.digikey.com" target="_blank" title="DigiKey">DigiKey</a>, and I ended up doing quite a few component substitutions. The cabinet + front and back panels were ordered from <a alt="Headnhifi" href="http://www.headnhifi.com" target="_blank" title="Headnhifi">Headnhifi</a>.</p></div></div>
</div><div data-element-id="elm_65G5BgOpStO-KJ8BNBn0kQ" data-element-type="image" class="zpelement zpelem-image "><style></style><div data-caption-color="" data-size-tablet="" data-size-mobile="" data-align="left" data-tablet-image-separate="" data-mobile-image-separate="" class="zpimage-container zpimage-align-left zpimage-size-original zpimage-tablet-fallback-original zpimage-mobile-fallback-original hb-lightbox " data-lightbox-options="
                type:fullscreen,
                theme:dark"><figure role="none" class="zpimage-data-ref"><a class="zpimage-anchor" style="cursor:pointer;" href="javascript:;"><picture><img class="zpimage zpimage-style-none zpimage-space-none " src="/files/components.jpg" size="original" alt="O2 headphone amp components from DigiKey" title="O2 headphone amp components from DigiKey" data-lightbox="true"/></picture></a><figcaption class="zpimage-caption zpimage-caption-align-center"><span class="zpimage-caption-content"></span></figcaption></figure></div>
</div><div data-element-id="elm_lGLKKjG4T1an66wXCkS09Q" data-element-type="image" class="zpelement zpelem-image "><style></style><div data-caption-color="" data-size-tablet="" data-size-mobile="" data-align="" data-tablet-image-separate="" data-mobile-image-separate="" class="zpimage-container zpimage-align- zpimage-size-original zpimage-tablet-fallback-original zpimage-mobile-fallback-original hb-lightbox " data-lightbox-options="
                type:fullscreen,
                theme:dark"><figure role="none" class="zpimage-data-ref"><a class="zpimage-anchor" style="cursor:pointer;" href="javascript:;"><picture><img class="zpimage zpimage-style-none zpimage-space-none " src="/files/enclosure.jpg" size="original" alt="Empty O2 cabinet and panels from Headnhifi" title="Empty O2 cabinet and panels from Headnhifi" data-lightbox="true"/></picture></a><figcaption class="zpimage-caption zpimage-caption-align-center"><span class="zpimage-caption-content"></span></figcaption></figure></div>
</div><div data-element-id="elm_bQ3OmQvCQZqO8wRPYAgPjA" data-element-type="text" class="zpelement zpelem-text "><style></style><div class="zptext zptext-align- " data-editor="true"><div><p>I did spend a lot of time identifying the right components. There are a lot of different resistor values, and they have to be cross referenced with the BoM. Of course, it didn't help that I have a box with all E24 resistor values that aren't sorted in any way.</p><p><br></p><p>Once the sorting of components was done, it didn't actually take long to solder the thing. I'm really happy I got the recommended enclosure and panels. This thing looks really great.</p></div></div>
</div><div data-element-id="elm_9WTkehaBS_CSEp6Xw_hCPw" data-element-type="codeSnippet" class="zpelement zpelem-codesnippet "><div class="zpsnippet-container"><script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script><!-- Footer and articles --><ins class="adsbygoogle" style="display:block;" data-ad-client="ca-pub-1413216582870086" data-ad-slot="7047096651" data-ad-format="auto"></ins><script>
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</div><div data-element-id="elm_P67XERjhTfu9pPrPFxXBYw" data-element-type="image" class="zpelement zpelem-image "><style></style><div data-caption-color="" data-size-tablet="" data-size-mobile="" data-align="" data-tablet-image-separate="" data-mobile-image-separate="" class="zpimage-container zpimage-align- zpimage-size-original zpimage-tablet-fallback-original zpimage-mobile-fallback-original hb-lightbox " data-lightbox-options="
                type:fullscreen,
                theme:dark"><figure role="none" class="zpimage-data-ref"><a class="zpimage-anchor" style="cursor:pointer;" href="javascript:;"><picture><img class="zpimage zpimage-style-none zpimage-space-none " src="/files/barebuild.jpg" size="original" alt="O2 headphone amp, soldering done" title="O2 headphone amp, soldering done" data-lightbox="true"/></picture></a><figcaption class="zpimage-caption zpimage-caption-align-center"><span class="zpimage-caption-content"></span></figcaption></figure></div>
</div><div data-element-id="elm_BqUcAKwmSKuZR7bi38AFGQ" data-element-type="image" class="zpelement zpelem-image "><style></style><div data-caption-color="" data-size-tablet="" data-size-mobile="" data-align="" data-tablet-image-separate="" data-mobile-image-separate="" class="zpimage-container zpimage-align- zpimage-size-original zpimage-tablet-fallback-original zpimage-mobile-fallback-original hb-lightbox " data-lightbox-options="
                type:fullscreen,
                theme:dark"><figure role="none" class="zpimage-data-ref"><a class="zpimage-anchor" style="cursor:pointer;" href="javascript:;"><picture><img class="zpimage zpimage-style-none zpimage-space-none " src="/files/finishedbuild.jpg" size="original" alt="Completed O2 headphone amplifier" title="Completed O2 headphone amplifier" data-lightbox="true"/></picture></a><figcaption class="zpimage-caption zpimage-caption-align-center"><span class="zpimage-caption-content"></span></figcaption></figure></div>
</div><div data-element-id="elm_EU50glnsTnGXJJJFFzpL0A" data-element-type="text" class="zpelement zpelem-text "><style></style><div class="zptext zptext-align- " data-editor="true"><div><p>Initial impressions are really good. My main problem (until the Sennheiser HD 600 headphones arrive) is that I only have an old pair of Koss PortaPro available. The foam around the earpieces is really old, and creates a cloud of tiny black dust...</p></div></div>
</div><div data-element-id="elm_LN9Ca4GDQZi6xBMt0U7S3g" data-element-type="image" class="zpelement zpelem-image "><style></style><div data-caption-color="" data-size-tablet="" data-size-mobile="" data-align="" data-tablet-image-separate="" data-mobile-image-separate="" class="zpimage-container zpimage-align- zpimage-size-original zpimage-tablet-fallback-original zpimage-mobile-fallback-original hb-lightbox " data-lightbox-options="
                type:fullscreen,
                theme:dark"><figure role="none" class="zpimage-data-ref"><a class="zpimage-anchor" style="cursor:pointer;" href="javascript:;"><picture><img class="zpimage zpimage-style-none zpimage-space-none " src="/files/portapro.jpg" size="original" alt="Koss PortaPro headphones" title="Koss PortaPro headphones" data-lightbox="true"/></picture></a><figcaption class="zpimage-caption zpimage-caption-align-center"><span class="zpimage-caption-content"></span></figcaption></figure></div>
</div></div></div></div></div></div> ]]></content:encoded><pubDate>Mon, 16 Oct 2017 09:52:55 +0200</pubDate></item></channel></rss>