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Old 22nd February 2006, 11:23 AM   #1
pejinm is offline pejinm  Serbia
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Default Headbanger headphone amp

Hi guys,

I build this headphone amp with 4 stereo channels oredered by my friends (musicians),
they will use it like some kind of in ear monitor on rehearsals. Anyway here are some pics...
What do you think?

Cheers
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Old 22nd February 2006, 11:24 AM   #2
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Old 22nd February 2006, 11:27 AM   #3
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If anyone interested I will post PCB and schematic...
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Old 22nd February 2006, 06:16 PM   #4
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Hi. Nice work, useful thing for musicians.
I'd like to see the pcb&schematic, maybe I built one for my band too.
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Old 22nd February 2006, 07:31 PM   #5
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Default PCB...

The amp is based on NationalSemiconductor LM386N op amp which can work with 6-12V supply.
The PCB layout for 4 stereo chanels attached...

Regards.
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Old 22nd February 2006, 07:34 PM   #6
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...and tracks...

I hope you can use this resolution because I can't post larger pic.
Cheers
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Old 23rd February 2006, 11:41 AM   #7
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Allright, thank you.
Thougt of that 386, perfect for such a "Low-Fi" environment.
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Old 23rd February 2006, 09:27 PM   #8
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You welcome,

Please post the pictures of your work when you finished, I would like to see it...

Good Luck
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Old 24th February 2006, 04:31 PM   #9
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Awesome little amp.

That's a LOT of 386 chips, hehe.

They work great for small speakers, and real good for headphones.

I made a super listening mic amp and used a 386 on the output, and it's real loud.

I noticed you used large 10uf input caps and 470uf output caps. Very nice.

Also, the box looks real clean.

And by what I see, is the volume is determined by the input source?
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Old 24th February 2006, 09:54 PM   #10
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Hi EWorkshop1708,

Glad you like it!
Yes there is no pots because most of quality headphones have volume control on them (and I have't got much space left in case he,he...)

Regards
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