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O2 AMP + ODAC - Page 216

post #3226 of 3771

I love the O2 and the ODAC, its a marvelous pairing for most cans except ones like HE6's etch...

 

I built the desktop O2 called the ODA from an engineer over at DIY Audio, it has measurements similar and in some cases better than the O2.

 

Designed in the same spirit it has evolved to version 2.1 and may evolve even further.

 

It has 3 times the current capability of the O2 and can drive even HE6's with authority.

 

Check it out if your a DIY person, you can't buy this one .....maybe someday.

 

Alex


Edited by adydula - 7/30/14 at 5:26pm
post #3227 of 3771

...I want one.

 

Ugh. I wish I was more handy with electrical engineering.

post #3228 of 3771
Not necessarily EE but you should definitely have soldering skills.
post #3229 of 3771
Quote:
Originally Posted by TheGame21x View Post
 

...I want one.

 

Ugh. I wish I was more handy with electrical engineering.

 

EE would help troubleshoot mistakes and faults. Soldering skills however can be seen as a completely separate skill, though both seem to compliment each other very well.

 

I for one am a hobbyist whom picked up soldering but know next to nothing about electronics. Luckily I am as thorough as I am patient when following assembly instructions.

 

I still can't find a good reason yet to try out the ODA, since my O2 already has the mod board. Perhaps I'll give the ODA a shot once it reaches the next few revisions and when I find myself with "real" disposable income.

post #3230 of 3771

I would recommend you to build at least an O2 like the 'kit' type from Jds labs. Its not really a kit, but the pc board and all the parts to populate an O2. You will need a case and the AC adapter.

 

You will have to read the designers blog for instructions on how best to populate it and test it etch..

 

But before I would build this I would practice soldering, with a pert board from radio shack, buy some cheap resistors etch and practice soldering point to point and adding wires etc.

 

Soldering is no hard but it takes some learning and practicing to understand how it works, to know if a joint is done properly or not and how to re-work etc.

 

The other thing with DIY is having some understanding what the parts are, How to tell a resistor from a capacitor etc.

Some parts are directional and some have polarity. If installed incorrectly a capacitor will burst of explode making a mess.

 

The ODA uses really very small parts in several areas and there are choices to make on how to set up certain things, kind of like options. It helps to understand how to make the choices for you particular situation.

 

I have seen people trying to get a basic O2 up and running and having all kinds on issues, mainly due to lack of knowledge and understanding.... and crappy soldering.

 

The parts for an ODA cost me close to $300.

 

It is well structured and very compartmentalized when it comes to testing etch... very well thought out.

 

You can get lots of web help from the folks at DIY audio.

 

ODA pc boards for version 2.1 are in test. If your interested send AGDR at diyaudio a pm.

 

All the best

Alex

post #3231 of 3771
Quote:
Originally Posted by TheGame21x View Post
 

...I want one.

 

Ugh. I wish I was more handy with electrical engineering.

 

Your current cans will not improve with an ODA , so you don't need one unless your planing in buying some HE-6 :p 

Quote:
Originally Posted by adydula View Post

 

The parts for an ODA cost me close to $300.

 

 

Alex

 

300$ ? hum same budget as an allready made G103-S from lake People : / . But kuddos for AGR on his work on ODA .


Edited by HaVoC-28 - 7/30/14 at 8:31pm
post #3232 of 3771
Quote:
Originally Posted by TheGame21x View Post
 

...I want one.

 

Ugh. I wish I was more handy with electrical engineering.

The ODA is definitely not a starter project, certainly if you've never soldered before.  Parts are very small and if you don't know what you're doing and have no equipment, debugging will be virtually impossible. There are many other projects out there that will give you a good dac/amp with power to spare and are easier builds due to less parts and larger components/spacious boards.  Take a look on diyaudio.

post #3233 of 3771

I got my o2 amp today and it says on the top to charge it for 8-12 hours before first use. Is it ok if i use while charging ?

post #3234 of 3771
I'm unsure what the booster board is for. Would it benefit my HD 650's?
post #3235 of 3771
Quote:
Originally Posted by Zorrofox View Post

I'm unsure what the booster board is for. Would it benefit my HD 650's?

I.m.o. no.  It's an add-on module for an existing O2 that basically provides some extra oomph but with the 650 I don't think it'll result in an audible difference.  

post #3236 of 3771
Quote:
Originally Posted by shak85 View Post
 

I got my o2 amp today and it says on the top to charge it for 8-12 hours before first use. Is it ok if i use while charging ?

 And how do i know if it charging or not ? Is there a led indicator ?

post #3237 of 3771
Quote:
Originally Posted by shak85 View Post

I got my o2 amp today and it says on the top to charge it for 8-12 hours before first use. Is it ok if i use while charging ?

Quote:
Originally Posted by shak85 View Post

 And how do i know if it charging or not ? Is there a led indicator ?

I'm pretty sure it's OK to use whilst charging but there's no charging indicator I'm afraid.
post #3238 of 3771
Quote:
Originally Posted by Xenophon View Post
 

I.m.o. no.  It's an add-on module for an existing O2 that basically provides some extra oomph but with the 650 I don't think it'll result in an audible difference.  

 

It has for me. But it's difficult to tell if it's subjectivity speaking since I haven't got a spare O2 at hand.

 

The booster board essentially replaces both MOSFETs with ones much better across the board. Other mods were mentioned outside of the booster board mod, including 0 output resistance and mods for higher voltage swing. Both by the looks of it, do require the booster board mod to be installed first.

 

I got the O2 booster board mainly because I am more than happy to stick with this little amp. The booster board just allows it that slightly increased versatility with other headphones should I have the itch to expand from the HD650.

post #3239 of 3771
Quote:
Originally Posted by JacobLee89 View Post
 

 

It has for me. But it's difficult to tell if it's subjectivity speaking since I haven't got a spare O2 at hand.

 

Then get an O² without booster board to exactly know if it had something or if it's just old plain placebo .

 

It's an O²/ODAC thread , we have to be a minimum objective :p

 

(just kidding) :o


Edited by HaVoC-28 - 7/31/14 at 3:27am
post #3240 of 3771
Quote:
Originally Posted by HaVoC-28 View Post
 

 

Then get an O² without booster board to exactly know if it had something or if it's just old plain placebo .

 

It's an O²/ODAC thread , we have to be a minimum objective :p

 

(just kidding) :o

I have to say: "This is where the fun starts" , though I'd like to think that I am Objective 2! (I'm not ashamed of this one)

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