The Objective2 (O2) Headphone Amp DIY Project - Page 189 - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

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
Reply
 
Thread Tools Search this Thread
Old 19th January 2012, 08:22 PM   #1881
Turbon is offline Turbon  Sweden
diyAudio Member
 
Turbon's Avatar
 
Join Date: Aug 2011
Location: South
Thanks lorriman. I have to check out the Fostexs. It have never occured to me that one could build headphones yourself...

Brgds
__________________
These are my principles, and if you don't like them... well, I have others.
  Reply With Quote
Old 19th January 2012, 08:24 PM   #1882
diyAudio Member
 
Join Date: Nov 2011
Location: Surrey
Quote:
Originally Posted by Turbon View Post
Thanks lorriman. I have to check out the Fostexs. It have never occured to me that one could build headphones yourself...

Brgds
Well, it's not quite building; just a mod. A fairly easy one also.
  Reply With Quote
Old 20th January 2012, 09:35 AM   #1883
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
Default My (untested) version of aux O2 power

This is the parts values and schematic for implementing auxiliary power for the O2 using a USB port or a 12VDC lighter socket. I'm deciding on a suitable case still and the circuit hasn't been built. Its main purpose is to recharge the O2's batteries, but the converter can output about +/-100mA. It could power some headphones.
It's nothing spectacular or out of the ordinary. I just want it to work, and I think it will. Corrections will be most appreciated.
The switched LEDs are to keep a load on the converter, and provide a visual indication to plug-unplug without a live TRS plug. TRS seems the most practical connection. The socket is on the back panel (there's plenty of room in the B2 case above R1 & R2) using a grommet insulator.
Attached Images
File Type: png O2auxps0.png (35.1 KB, 335 views)
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 20th January 2012, 09:50 AM   #1884
diyAudio Member
 
Join Date: Nov 2011
Location: Surrey
Quote:
Originally Posted by sofaspud View Post
This is the parts values and schematic for implementing auxiliary power for the O2 using a USB port or a 12VDC lighter socket. I'm deciding on a suitable case still and the circuit hasn't been built. Its main purpose is to recharge the O2's batteries, but the converter can output about +/-100mA. It could power some headphones.
It's nothing spectacular or out of the ordinary. I just want it to work, and I think it will. Corrections will be most appreciated.
The switched LEDs are to keep a load on the converter, and provide a visual indication to plug-unplug without a live TRS plug. TRS seems the most practical connection. The socket is on the back panel (there's plenty of room in the B2 case above R1 & R2) using a grommet insulator.
This is marvellous!!
  Reply With Quote
Old 20th January 2012, 10:07 AM   #1885
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
I forgot to include that all caps need to be 20-25V or higher.
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 20th January 2012, 01:24 PM   #1886
billyk is offline billyk  United States
diyAudio Member
 
billyk's Avatar
 
Join Date: Oct 2005
Location: North Central Mass, USA
@sofaspud I built very close to the exact thing to power Tangent's Mint circuit that I use as a pre amp for my car audio system. I don't use the USB input tho. Works well and does a fine job of isolating and regulating the car's power system from the pre amp circuit, not to mention the =/- power output!

Last edited by billyk; 20th January 2012 at 01:46 PM.
  Reply With Quote
Old 20th January 2012, 02:26 PM   #1887
diyAudio Member
 
Join Date: Nov 2011
Does anyone know of a similar power supply quoted other than the WAU12-200?
  Reply With Quote
Old 20th January 2012, 07:38 PM   #1888
diyAudio Member
 
Join Date: Oct 2011
Default UK - Enclosures

If anyone's interested, CPC in the UK are running a promotion at present, offering free shipping on orders over 10 (excl. VAT) - usually, you have to order 40 worth of stuff to qualify for free shipping. Anyhow, this offer runs until 23 Jan - and they sell the O2 enclosures, e.g. BOX ENCLOSURES|B2-080BK|ALUMINIUM INSTRUMENT HOUSING | CPC

  Reply With Quote
Old 20th January 2012, 07:42 PM   #1889
diyAudio Member
 
Join Date: Oct 2011
@Lorriman - thanks for the heads up on the Superlux HD681 - currently 19.49 from Amazon http://www.amazon.co.uk/Superlux-HD6...7092021&sr=8-1
lots of interesting reviews, got to be worth a try, so I've ordered a pair.
  Reply With Quote
Old 20th January 2012, 11:58 PM   #1890
diyAudio Member
 
Join Date: Dec 2011
Hey guys I'd figure I would just post in this thread as well. I have a 5 page thread about how I just built two Objective 2 amps and neither will work on AC power. They both work just fine with batteries installed but not on AC power. Please help me! It must be something I am doing wrong or have a bad part. I've tried various tests with no luck!
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


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 07:22 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2