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-   -   Headphone Amplifier ( Circuit needed) (http://www.diyaudio.com/forums/headphone-systems/101249-headphone-amplifier-circuit-needed.html)

Ayne 4th May 2007 06:00 AM

Headphone Amplifier ( Circuit needed)
 
A good design Headphone Amplifier is needed.

I want to make Headphone Amplifier for my computer table.

If someone have a good design plz share here.

Thanks.

el`Ol 4th May 2007 06:44 AM

Here is a thread about a headphone amp.
http://www.diyaudio.com/forums/showt...0&pagenumber=1

Nordic 4th May 2007 07:40 AM

check diy and project sections over at www.head-fi.org !

sandyK 4th May 2007 08:39 AM

Re Headfphone Amplifier Kit
 
Silicon Chip magazine recently pulished a design for a very high quality headphone amplifier kit and a suitable voltage regulator board. The unit is able to drive headphones from 8 ohm to 600ohm. (minor component changes for high or low impedance phones.) It is also designed to drive 2 pairs of headphones at a time. The constructor would need to be able to safely build it in a suitable plastic case containing a 15-0-15VAC 20VA toroidal transformer , mains switch and sockets etc, as well as a volume control . I am using such a unit with my X-FI PC sound card.
Jaycar Electronics sells both kits for<AU$40 (KC5417 and KC5418)
I had to fit a banana plug connected to the amps mains earth , to plug in a lead connected to the PC metalwork ,to kill an earth hum

www.jaycar.com.au
SandyK

jcx 4th May 2007 01:25 PM

HeadWize is more of the repository of diy headphone amplifier knowledge

http://headwize.com/projects/index.htm

and the DIY forum there has some active projects that donít have project articles yet

http://headwize.com/ubb/forumdisplay.php?fnum=3


most head-fi DIY forum builds are based on the Headwize projects (and several are built and sold as commercial products )


another good site for diy headphone amp info

http://tangentsoft.net/audio/

sandyK 4th May 2007 01:56 PM

re Headwize
 
2 Attachment(s)
I have seen many of those designs, and haven't been overly excited by most of them. IMHO, the recent Silicon Chip design would have better performance than most of them, and is also capable of driving 2 sets of headphones at once. It can also be optimised for the low impedance OR higher impedance types, and gives a reasonable amount of protection to the wearer of the headphones as far as potententially ear damaging levels are concerned. The measured specifications are also very good by today's standards.
The big advantage is the price of the kit which is just under $30 for the Headphone Amp kit only. Both kits are about AU$48 (not AU$40 as I said earlier) The kits are also capable of even higher SQ with changes of the opamps and O/P devices.
Hopefully, there is a (poor) copy of the schematic attached.
SandyK

bluesmoke 4th May 2007 02:09 PM

If you're just looking for something affordable, easy to build, and still sounds quite good (with a lot of options to upgrade), I had started a small thread, again based on a design found off the web....

http://www.diyaudio.com/forums/showt...threadid=92299

Great thing is, you still have cash in the end to try using different opamps.

Nordic 4th May 2007 02:14 PM

Care to post a larger image, Sandy?

sandyK 4th May 2007 02:32 PM

I had trouble keeping to 120KB attachment limit. If you care to email me, I will send a decent size schematic and photo.
SandyK
alexkethel@optusnet.com.au

Christer 4th May 2007 02:36 PM

What format is the picture? If you convert to GIF (ie. by using MS Paint) there is usually no problem with file size. Howver, that works best with original drawings made on a computer. Scanned pictures might be problematic.


BTW, I wonder why they took the effort to make the buffer so complicated, with dual CCSs, and still not changed two diodes to transistors to get a diamond buffer instead?


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