Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Headphone Systems Everything to do with Headphones

The Objective2 (O2) Headphone Amp DIY Project
The Objective2 (O2) Headphone Amp DIY Project
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 5th December 2011, 07:47 PM   #1181
sofaspud is offline sofaspud  United States
diyAudio Member
sofaspud's Avatar
Join Date: Nov 2005
Location: San Antonio
How can both statements be true? Clearly you lack the ability to understand subtle phrasing of meaning. "Required" != "recommended".
I understand it clearly. If you think there is a contradiction, consider the possibilities until you find the one that doesn't contradict.
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 5th December 2011, 07:48 PM   #1182
Alexium is offline Alexium  Ukraine
diyAudio Member
Join Date: May 2010
Originally Posted by RocketScientist View Post
Thank you! of course, I read the "Construction" section. In fact, I read the whole blog entry more than once. But I still don't feel confident enough (for one, I'm not sure I have identified all the components correctly, I'm used to soviet components and not quite familiar with the modern European ones). I was hoping someone has composed the instruction like "put the piece A into the hole B"
  Reply With Quote
Old 5th December 2011, 07:49 PM   #1183
RocketScientist is offline RocketScientist  United States
diyAudio Member
RocketScientist's Avatar
Join Date: Mar 2008
Location: Northwest
@Willikan, thanks for sharing! That's the first one I've seen with RCAs on the front which cuts down on panel costs. I use that audio grade glue sometimes too. Good stuff!
http://nwavguy.com - Personal non-commercial audio blog
  Reply With Quote
Old 5th December 2011, 07:53 PM   #1184
Jokener is offline Jokener  Germany
diyAudio Member
Join Date: Sep 2010
Location: Good ol' Germany
@Alexium: It is really easier than you think.
You start with the resistors and Diodes.
To find out what color codes on the resistors relate to what values, use an online tool.
The diodes are easy, just go by the quantity used.
Then the small caps (go by quantity, lead spacing and pictures... Mouser and Google are great).
Then the DIP-8 sockets and everything else, they should all be self-explanatory when consulting the PCB and the BOM.

Its really smooth sailing. I was surprised myself.

Best regards,
New O2 Amplifier GB: Order Thread, Order Status PDF (Password: diyaudio.com)
Pictures of the GB are in the Gallery: Click me! (User & Password: diyaudio.com)
  Reply With Quote
Old 5th December 2011, 07:55 PM   #1185
cheapskateaudio is offline cheapskateaudio  United States
diyAudio Member
Join Date: Oct 2011
Originally Posted by qusp View Post
CSA really is an insane person. ignore the troll he changes his story, changes his thoughts, changes his words; all in an effort to gain a reaction
I change my thoughts, my words, my story? Why does this make one insane? Things change, new ideas, new facts, these things adjust perception, unlike you I'm trying to find the TRUTH, and not live according to DOGMA like some folks around here who get all kerfluffled when their dogma is challenged.
  Reply With Quote
Old 5th December 2011, 07:55 PM   #1186
timpert is offline timpert  Netherlands
diyAudio Member
Join Date: Nov 2004
Location: Netherlands

I was hoping someone has composed the instruction like "put the piece A into the hole B"
I have just started writing something like that. I think a first version should be ready after the weekend, to be reviewed here.

@ Jokener:

Construction might seem daunting, so people might get increased confidence from a step-by-step description, so that they actually see that it is not such a big deal before diving into the deep.

Last edited by timpert; 5th December 2011 at 07:58 PM.
  Reply With Quote
Old 5th December 2011, 07:57 PM   #1187
ethanolson is offline ethanolson  United States
diyAudio Member
Join Date: Nov 2011
Location: http://binged.it/ukmr5Y
CSA, et al., several years ago I used to get myself caught in "communication" traps and dug myself in deeper all the time trying to find stuff to back up my position. That tactic is best suited to talk radio. Now I just don't get emotionally invested in problems I'm trying to work out (including personal attacks) and things are much better because of it.

There's hope yet. Just give it time and realize the wisest among us are those who don't mind learning and taking correction even from the harshest of people.

I'd love to make changes to the O2 as well, but I don't know if any would make it "better." Better for more cost and complexity isn't always better, is it?! I personally would much prefer to have it built to run on 4 AA eneloop 1500 batteries. The power circuit would really have to change and maybe not for the better.There's only one way to find out.
  Reply With Quote
Old 5th December 2011, 07:58 PM   #1188
konga is offline konga  United States
diyAudio Member
Join Date: Feb 2009
Well this weekend I had a free moment and got my O2 working again!

I was completely wrong, the regulator was fine. I double checked the all solder joints and re-flowed any that looked suspect as well as all the components in the power section.

While I was examining the board, flipping it around under a magnifying glass I felt some odd rattling from the 3.5 mm output jack that. It was faint, you felt it more then you can hear it. I de-soldered it (a complete pain-in-the-rear) and replaced it with one I had in my parts bin.

Powered it up and it works again! At this point I'm going to sum it up as my stupid mistake, a weak solder joint that just happen to fail after a week of burn in. I should have triple checked re-flowed everything first before making outrageous presumptions.

Thanks to RS and everyone that offered their suggestions.
  Reply With Quote
Old 5th December 2011, 07:59 PM   #1189
billyk is offline billyk  United States
diyAudio Member
billyk's Avatar
Join Date: Oct 2005
Location: North Central Mass, USA
Mouser order is in, boards are ordered.
I'm pretty psyched to add this li'l guy to my collection.
Thanks to RocketScientist for all the effort in bringing a new goodie to the community.
I'll report in when it is assembled.

Last edited by billyk; 5th December 2011 at 08:10 PM.
  Reply With Quote
Old 5th December 2011, 07:59 PM   #1190
Willakan is offline Willakan  United Kingdom
diyAudio Member
Join Date: Aug 2011
The only vaguely difficult part of the build for me was avoiding/fixing solder bridges when soldering the MOSFETS and regulators, but that is more testament to my ****-poor technique and the fact I decided not to invest in any desoldering equipment. Hence I had to get rid of the bridges by heating the solder and poking them with a cocktail stick! Worked surprisingly well, all things considered.

EDIT:@billyk: Not easily, I'm afraid. The O2 uses a dual-rail supply.

Last edited by Willakan; 5th December 2011 at 08:03 PM.
  Reply With Quote


The Objective2 (O2) Headphone Amp DIY ProjectHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Headphone amp project grahamfocal Headphone Systems 7 21st June 2011 05:28 PM
My latest project - DAC + headphone amp gmarsh Digital Line Level 105 13th December 2010 02:31 PM
My headphone amp project trifidmaster Headphone Systems 2 22nd December 2008 03:52 PM
Mini Ipod headphone amp DIY project Nordic Headphone Systems 14 11th March 2007 02:35 PM
Need help for a battery headphone amp project dismalonyx Headphone Systems 1 15th April 2004 11:22 PM

New To Site? Need Help?

All times are GMT. The time now is 08:11 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio