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DIY For Audio
The Sonic2k Headphone Amplifier
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<blockquote data-quote="rfq" data-source="post: 630348" data-attributes="member: 15523"><p>Update: </p><p>A request has been made about the possibility of powering this guy from batteries.</p><p>Well, it is a bit of a problem.</p><p></p><p>a) There is a lot of electronics coming that needs power, so I think battery life would suck.</p><p>b) The voltages are already +15 and -15, that would mean an awful lot of batteries.</p><p>c) To ensure there is no power-up "plop" in the headphones (characteristic of Class AB design) I am including a relay on the output that will kick in as soon as the power amplifier is stable. The relay itself would consume lots of mA.</p><p></p><p>Once the thing is complete, I can look at it again, but for now, if a battery powered amp is needed, I think a different design might be called for.</p><p></p><p>I am also planning to make it remote controlled, because, with space at a premium these days (and especially once I have moved into the cottage) I don't want to have to lean out of comfort to adjust the volume.</p></blockquote><p></p>
[QUOTE="rfq, post: 630348, member: 15523"] Update: A request has been made about the possibility of powering this guy from batteries. Well, it is a bit of a problem. a) There is a lot of electronics coming that needs power, so I think battery life would suck. b) The voltages are already +15 and -15, that would mean an awful lot of batteries. c) To ensure there is no power-up "plop" in the headphones (characteristic of Class AB design) I am including a relay on the output that will kick in as soon as the power amplifier is stable. The relay itself would consume lots of mA. Once the thing is complete, I can look at it again, but for now, if a battery powered amp is needed, I think a different design might be called for. I am also planning to make it remote controlled, because, with space at a premium these days (and especially once I have moved into the cottage) I don't want to have to lean out of comfort to adjust the volume. [/QUOTE]
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DIY & Tutorials
DIY For Audio
The Sonic2k Headphone Amplifier
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