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<blockquote data-quote="Marcus Venturi" data-source="post: 1102060" data-attributes="member: 121570"><p>1. If there is not sound, the speakers have relative quiet noise, but that's due to the fact, that the PC motherboard produces a lot of noise. But I can only hear it when my ear is right in front of one of the speakers.</p><p>2. Class D means, that it is a digital amplifier. A digital amplifier has a very high efficiency.</p><p>Just read this Wikipedia article to get a basic understanding: <a href="http://en.wikipedia.org/wiki/Class-D_amplifier" target="_blank">http://en.wikipedia.org/wiki/Class-D_amplifier</a></p><p>3. To get the right DC-DC boost converter just check if it covers the needed target voltage of your ampifier (in my case 24V) and of corse the desired power (in most cases 100-150W should be enough).</p><p>4. The amp is connected via the internal front panel audio connector on the motherboard.</p><p>See this link for more Information about the port: <a href="http://www.intel.com/support/motherboards/desktop/sb/CS-015851.htm" target="_blank">http://www.intel.com/support/motherboards/desktop/sb/CS-015851.htm</a></p><p></p><p>On the following picture you can see details of the audio cabling:</p><p></p><p>[ATTACH=full]155658[/ATTACH]</p><p></p><p>From the audio connector (1) a cable goes to a ground-loop-isoloator (2) and then to the input of the amplifier (3).</p><p></p><p>The ground-loop-isolator is necessary to filter PC-typical noise.</p><p></p><p>For more Information on that: <a href="http://en.wikipedia.org/wiki/Sheath_current_filter" target="_blank">http://en.wikipedia.org/wiki/Sheath_current_filter</a></p></blockquote><p></p>
[QUOTE="Marcus Venturi, post: 1102060, member: 121570"] 1. If there is not sound, the speakers have relative quiet noise, but that's due to the fact, that the PC motherboard produces a lot of noise. But I can only hear it when my ear is right in front of one of the speakers. 2. Class D means, that it is a digital amplifier. A digital amplifier has a very high efficiency. Just read this Wikipedia article to get a basic understanding: [url]http://en.wikipedia.org/wiki/Class-D_amplifier[/url] 3. To get the right DC-DC boost converter just check if it covers the needed target voltage of your ampifier (in my case 24V) and of corse the desired power (in most cases 100-150W should be enough). 4. The amp is connected via the internal front panel audio connector on the motherboard. See this link for more Information about the port: [url]http://www.intel.com/support/motherboards/desktop/sb/CS-015851.htm[/url] On the following picture you can see details of the audio cabling: [ATTACH=full]155658[/ATTACH] From the audio connector (1) a cable goes to a ground-loop-isoloator (2) and then to the input of the amplifier (3). The ground-loop-isolator is necessary to filter PC-typical noise. For more Information on that: [url]http://en.wikipedia.org/wiki/Sheath_current_filter[/url] [/QUOTE]
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