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Smallest Class A Preamp/Headphone Amp Design?
Smallest Class A Preamp/Headphone Amp Design?
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Old 15th June 2008, 04:07 PM   #1
m0b1liz3 is offline m0b1liz3  Australia
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Default Smallest Class A Preamp/Headphone Amp Design?

Hello, I was wanting to build a pre-amp/headphone amp with the smallest possible footprint yet with excellent SQ. Any suggestions?
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Old 15th June 2008, 05:04 PM   #2
Boris_The_Blade is offline Boris_The_Blade  United States
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Pete Millett's Starving student headphone amp is pretty compact.

http://www.pmillett.com/starving.htm
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Old 15th June 2008, 05:21 PM   #3
m0b1liz3 is offline m0b1liz3  Australia
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Yep I already know about that one but I don't think it is Class A and probably not well suited for preamp duty but looks like a cool cheap project.

I was thinking about the Morgan Jones modified HP amp but don't know if they are simple enough for me to make as a beginner. I have no idea what they sound like either. If someone has a BOM and build diary that would be cool.
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Old 15th June 2008, 05:34 PM   #4
lochness is offline lochness  United States
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I remember seeing something done with a single 955 for each channel. It was just a rough schematic but its on the interwebs somewhere.
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Old 15th June 2008, 05:45 PM   #5
G is offline G  United States
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This might be what you are looking for:

http://headwize.com/projects/showfil...aarde1_prj.htm
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Old 15th June 2008, 06:01 PM   #6
Alain Dupont is offline Alain Dupont  France
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m0b1liz3,

One pretty good example here:
http://www.tubecad.com/2008/02/blog0133.htm

And the complete Kits here:
http://glass-ware.stores.yahoo.net/newhardware.html

Regards.

Alain.
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Old 15th June 2008, 06:12 PM   #7
GlidingDutchman is offline GlidingDutchman  South Africa
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Or you can try this! I have very pleasing results from it!

See link here: http://www.diyaudio.com/forums/showt...postid=1538431

And see attached (updated schematic)

Cheers
D
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File Type: jpg class a se v04 amp - ss.jpg (12.1 KB, 864 views)
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Old 15th June 2008, 06:31 PM   #8
m0b1liz3 is offline m0b1liz3  Australia
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Quote:
Originally posted by GlidingDutchman
Or you can try this! I have very pleasing results from it!

See link here: http://www.diyaudio.com/forums/showt...postid=1538431

And see attached (updated schematic)

Cheers
D

Do you have any pics of the actual build?
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Old 15th June 2008, 06:52 PM   #9
GlidingDutchman is offline GlidingDutchman  South Africa
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Quote:
Originally posted by m0b1liz3

Do you have any pics of the actual build?
It is still a tangle of wires but I am going to develop it into a more presentable product soon.

D
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Old 15th June 2008, 09:23 PM   #10
m0b1liz3 is offline m0b1liz3  Australia
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Quote:
Originally posted by G
This might be what you are looking for:

http://headwize.com/projects/showfil...aarde1_prj.htm
Some of those projects look intersting but the power supply always seems to be a hassle. It would also be nice to know there are other people who have successfully built a certain project so that questions can be asked to the DIY community.
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