How is this little headphone amp?
Mar 18, 2006 at 9:46 AM Thread Starter Post #1 of 19

mikechai

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minieph10.jpg

minieph08.jpg


It uses full discrete design, class AB circuitry.
Can be had for under USD35 fully assembled.
Any comments of the design and components used?
 
Mar 18, 2006 at 10:22 AM Post #2 of 19

Tomo

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Hey,

Looks good, but we can't comment without see the schematics. But I think you must have a current mirror with a current sink and those two big transistors are the complementary pair. Standard but very solid setup, if you ask me. Very neat.

Ciao,

T

P.S. Why are you hiding the coding on your board (top pic leftside)??
 
Mar 18, 2006 at 10:44 AM Post #3 of 19

cire

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its nice, but 15v input is pretty steep for a pocket amp... whats the current draw?
 
Mar 18, 2006 at 2:44 PM Post #4 of 19

nikongod

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Quote:

Originally Posted by cire
its nice, but 15v input is pretty steep for a pocket amp... whats the current draw?


no way.

14 rechargable "aa" batteries and a regulator would easily fit in a "daughtercase"to suply that.

i am curious why the design dosnt use a larger heatsink. i am personally a fan of bolting junk to the walls of cases, and the ever popular "sheet" of aluminum below the mainboard...

edit, im also curious why a portable dosnt use the switched variant of that pot.
 
Mar 18, 2006 at 2:57 PM Post #5 of 19

boodi

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Quote:

Originally Posted by mikechai
minieph10.jpg

minieph08.jpg


It uses full discrete design, class AB circuitry.
Can be had for under USD35 fully assembled.
Any comments of the design and components used?



the price is gorgeous
where can I get mine ( test putpose ) ?
 
Mar 18, 2006 at 3:11 PM Post #6 of 19

nikongod

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Quote:

Originally Posted by boodi
Quote:

Originally Posted by mikechai
minieph10.jpg

minieph08.jpg


It uses full discrete design, class AB circuitry.
Can be had for under USD35 fully assembled.
Any comments of the design and components used?



the price is gorgeous
where can I get mine ( test putpose ) ?



lookup "mini-eph" or "pecker headphone amp?"
 
Mar 18, 2006 at 4:46 PM Post #9 of 19

mikechai

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Quote:

Originally Posted by boodi
the price is gorgeous
where can I get mine ( test putpose ) ?



The price is really low, but the shipping will cost at least another USD20.
If you want, I can arrange it for you.
 
Mar 18, 2006 at 4:48 PM Post #10 of 19

mikechai

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Quote:

Originally Posted by cire
its nice, but 15v input is pretty steep for a pocket amp... whats the current draw?


According to the creator, 12v is enough actually.
But the amp can take anywhere between 10v to 24v.
 
Mar 18, 2006 at 7:04 PM Post #12 of 19

rickcr42

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Quote:

"pecker headphone amp?"


they might want to consider a product name change for the U.s. Market
very_evil_smiley.gif


damn fine looking amp though.Discrete means you can play with the biasing or even do parts subs to make this puppy whatever it is you want it to be from a stone cold battery killer to ultralight power to go
icon10.gif
 
Mar 18, 2006 at 7:52 PM Post #13 of 19

tilt

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wish i knew japanese
 
Mar 18, 2006 at 8:35 PM Post #14 of 19

tilt

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the pics he posted aren't in the auction.

I wanna know why he wont post the site address, and why its blurred out in the photo.
 
Mar 18, 2006 at 8:50 PM Post #15 of 19

ayt999

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Quote:

Originally Posted by tilt
wish i knew japanese


what are you referring to? the website linked to in this thread is in chinese.
 

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