Stereo Headphone amplifier Archives - Amplifier Circuit Design https://amplifiercircuit.net/tag/stereo-headphone-amplifier Amplifier Project Schematic Diagram Sat, 24 Dec 2011 07:44:15 +0000 en-US hourly 1 103688205 Small stereo headphone amplifier https://amplifiercircuit.net/small-stereo-headphone-amplifier.html https://amplifiercircuit.net/small-stereo-headphone-amplifier.html#respond Mon, 10 Oct 2011 04:39:39 +0000 http://amplifiercircuit.net/?p=616 A small stereo headphone amplifier cheap and very nice features (without HIFI). It only uses a single power supply value […]

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]]> Small headphone amplifierA small stereo headphone amplifier cheap and very nice features (without HIFI). It only uses a single power supply value between 15 V and 24 V (you can even lower up to 12 V, but with a less backup).

The total gain is determined by the ratio of resistors R102 / R101 for the left channel (top half of the diagram), and R202 / R201 for the right channel (lower half of the diagram), and is about 5 in this case (about 15 dB). Capacitors C103 and C203 may seem unnecessary to some, but mounting low gain can also oscillate, and these two capacitors limit the risk that happening.

Power is single, despite the presence of op amp, with the polarization to VCC / 2 of their non-inverting input (virtual ground composed of R104 / R105 and R204 / R205). A small supply decoupling consists of couples R107 / R207 and C106 / C206 reduces the internal resistance of the power supply and get a better response to transistions fast. The separation of the two left and right channels is also improved slightly (less crosstalk)

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]]> https://amplifiercircuit.net/small-stereo-headphone-amplifier.html/feed 0 616 2×50 mW Stereo Headphone amplifier https://amplifiercircuit.net/2-x-50-mw-stereo-headphone-amplifier.html https://amplifiercircuit.net/2-x-50-mw-stereo-headphone-amplifier.html#respond Wed, 21 Sep 2011 04:26:58 +0000 http://amplifiercircuit.net/?p=520 This headphone amplifier uses common components and probably will fill those looking for a really simple assembly. This is a […]

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]]> Stereo headphone amplifierThis headphone amplifier uses common components and probably will fill those looking for a really simple assembly. This is a typical Stereo Headphone amplifier example of what was found on the cheap small mixer, and even on some tables for mobile disco. The headset used can have impedance of 8 ohms and 200 ohms, this value is more appropriate here.

The Stereo Headphone amplifier schematic above you can see that simplicity is really up, since it shows all the components necessary for both left and right channels. Do not expect miracles from this type of assembly, the distortion can be quite important if you push too much volume … If you are looking for a headphone amp that sounds “loud and clear” for listening to your classical music pieces in your couch, I’m sorry, this circuit will probably not meet your expectations. But ‘normal’ use, it is a good small amp with extra nice.

Output Power Table :

 Load +/-9V +/-12V +/-15V +/-18V
8 ohms 2 mW 3 mW 3 mW 3 mW
16 ohms 3 mW 6 mW 7 mW 7 mW
32 ohms 6 mW 13 mW 14 mW 14 mW
100 ohms 14 mW 28 mW 42 mW 45 mW
200 ohms 20 mW 40 mW 68 mW 90 mW

 

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