Dual O2 headphone amp in 500 series "FEELER"

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elskardio

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Sep 29, 2010
Messages
436
Location
Montreal - Canada
Hi Guys,

I built many variant of the Objective2 Headphone amp in the past year and was always pleased with the results.

This time I went for a 500 series module with 2 independent O2 amps.

The circuit is identical to the original from NwAvGuy, including the power protection. I added a balanced input using a That 1286 IC.

I'm ordering PCBs and panels this week. I might sell the extras if there's enough interest. The front panel will be made from 2mm Aluminum PCB to keep the cost low.

Cheers

O2-500-Mockup-01.jpg
 

Whoops

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May 9, 2008
Messages
5,464
Location
Portugal
Looks pretty good,
congrats.

I was not aware of this Objective2 Heaphone amp.
I'm actually looking to build a few DIY headphone amps but there's so many around I was not sure what to build.

Did you built also other DIY headphone amps or just the O2?
 

elskardio

Well-known member
Joined
Sep 29, 2010
Messages
436
Location
Montreal - Canada
I built and tested a lot of different designs. I guess it all comes down to the purpose of the amp...

If you need something simple to blast the drummer's headphones while tracking, the standard CMoy is pretty hard to beat for the price. You probably have every components needed from the leftovers of your previous DIY projects. It can be easily built on a protoboard with any 9V DC wall wart you have lying around ;)

For critical listening, the O2 is to me the clear winner in its price range. But it is not the most musical headphone amp... don't expect any mojo or deep colourful bass here. Its true to the source which I think makes it perfect for studio monitoring.

Cheers
 

Whoops

Well-known member
Joined
May 9, 2008
Messages
5,464
Location
Portugal
Thanks Elskard,
I would like to build the CMoy for a long time and also an O2,
where did you get PCB's for those projects?
 

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