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The Objective2 (O2) Headphone Amp DIY Project | diyAudio
https://www.diyaudio.com/community/threads/the-objective2-o2-headphone-amp-diy-project.193977/
The power supply is a huge part of the O2's low cost performance. A real ground always beats a virtual ground. And the half-wave AC supply might seem "cheap and dirty" but properly engineered it works as well as any other AC power supply in this application. The proof is 131 dB of S/N and 0.0009% THD on battery or AC power.
The Objective2 (O2) Headphone Amp DIY Project - diyaudio.com
https://www.diyaudio.com/community/threads/the-objective2-o2-headphone-amp-diy-project.193977/page-3
I was wondering if there would be enough space for 2 more diodes. I'm sure the circuit will work fine in the short term - maybe even go years without a problem - it is just a long term reliability thing. Hopefully you can find a way to wedge in the diodes, or resistive divider. The divider is a good idea. Hadn't thought of that.
The Objective2 (O2) Headphone Amp DIY Project - diyaudio.com
https://www.diyaudio.com/community/threads/the-objective2-o2-headphone-amp-diy-project.193977/page-5
If anyone knows of realistic O2 sources, without volume controls, that have more than 2.8 V RMS of output, please post a link to the specifications here. And if there are such sources, the gain resistors can be simply clipped dropping the O2 to 1X gain and you could still drive the HD600s beyond an ear splitting 110 dB SPL with such a source.
DIY Audio Electronics from Zynsonix.com: The Objective2 ...
http://www.diyaudioblog.com/2012/01/objective2-o2-headphone-amp.html
The total cost of the build is very reasonable and should fall under $100 including the case, custom front panel and wall-wart. Add a couple hours of soldering time and you'll have yourself an amp. The Objective2 Sept 2011 PCB board. What's especially important with closely populated boards is starting with the small parts (resistors and diodes ...
Objective 2 replace pushbutton with flip Switch : diyaudio
https://www.reddit.com/r/diyaudio/comments/slycom/objective_2_replace_pushbutton_with_flip_switch/
Search within r/diyaudio. ... Objective 2 replace pushbutton with flip Switch. Close. 2. Posted by 2 days ago. Objective 2 replace pushbutton with flip Switch. I'm currently building an O2 Amp, and i thought it might be cool to have a Flip switch instead of the locking Push Button, but i don't know, if this is possible.
r/diyaudio - reddit
https://www.reddit.com/r/diyaudio/
1- in the build plan, I need to install the binding post right into the wood in the back. The binding post sticks out approximately 3/4 of an inch. In order not to have a space problem on my media cabinet. (Media cabinet is 15” deep, and the speakers are 11in deep for the 1TD and 13.25 for the 2TD) I wanted to 3D print a terminal cup and ...
NwAvGuy: O2 Summary
https://nwavguy.blogspot.com/2011/08/o2-summary.html
THE SHORT VERSION: By popular demand, here’s an “executive summary” and Q&A for the Objective 2 (O2) headphone amp. There are links sprinkled throughout leading to revised information in the previous three large articles and elsewhere. QUESTIONS ANSWERED: Before you post a comment to one of the articles, forum threads, etc., please see if your …
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