Headbanger headphone amp

pejinm · 22nd February 2006, 11:23 AM

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

pejinm · 22nd February 2006, 11:24 AM

2

pejinm · 22nd February 2006, 11:27 AM

If anyone interested I will post PCB and schematic...

karahara · 22nd February 2006, 06:16 PM

Hi. Nice work, useful thing for musicians.
I'd like to see the pcb&schematic, maybe I built one for my band too.

pejinm · 22nd February 2006, 07:31 PM

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.

pejinm · 22nd February 2006, 07:34 PM

...and tracks...

I hope you can use this resolution because I can't post larger pic.
Cheers

karahara · 23rd February 2006, 11:41 AM

Allright, thank you.
Thougt of that 386, perfect for such a "Low-Fi" environment.

pejinm · 23rd February 2006, 09:27 PM

You welcome,

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

Good Luck

EWorkshop1708 · 24th February 2006, 04:31 PM

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?

pejinm · 24th February 2006, 09:54 PM

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

23rd February 2006, 09:27 PM	#8
pejinm diyAudio Member Join Date: May 2005 Location: Serbia	You welcome, Please post the pictures of your work when you finished, I would like to see it... Good Luck __________________ "The quick brown fox jumps over the lazy dog."

24th February 2006, 09:54 PM	#10
pejinm diyAudio Member Join Date: May 2005 Location: Serbia	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 __________________ "The quick brown fox jumps over the lazy dog."

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22nd February 2006, 06:16 PM	#4
karahara diyAudio Member Join Date: Dec 2003 Location: Germany - Bavaria	Hi. Nice work, useful thing for musicians. I'd like to see the pcb&schematic, maybe I built one for my band too.

23rd February 2006, 11:41 AM	#7
karahara diyAudio Member Join Date: Dec 2003 Location: Germany - Bavaria	Allright, thank you. Thougt of that 386, perfect for such a "Low-Fi" environment.

24th February 2006, 04:31 PM	#9
EWorkshop1708 diyAudio Member Join Date: Nov 2004 Location: Florida	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?