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Building the O2 Headphone Amp | diyAudio
https://www.diyaudio.com/community/threads/building-the-o2-headphone-amp.217086/
Turn the amp on and the current should settle down to about 20 – 24 mA (or 6 – 8 mA for the Low Power version). If your DMM reads in amps, that’s 0.022 amps. Turn it back off, and repeat the test for the other battery (with the first battery reconnected). The current should be very close to the same.
O2 Headphone Amplifier AU/NZ | diyAudio
https://www.diyaudio.com/community/threads/o2-headphone-amplifier-au-nz.195288/
Hi all, I want to host a AU/NZ for this fantastic little project - an objectively designed headphone amplifier. Details You can find the discussion thread here. You can find the designer's blog (RocketScientist aka NwAvGuy) with further juicy details and measurements here. I will get a proper quote in due course, but I have had an estimate which will be good enough to get the …
O2 Headphone Amplifier GB | Page 5 | diyAudio
https://www.diyaudio.com/community/threads/o2-headphone-amplifier-gb.194708/page-5
O2 Headphone Amplifier GB | Page 61 | diyAudio
https://www.diyaudio.com/community/threads/o2-headphone-amplifier-gb.194708/page-61
@evahnyird: If there is nobody else, then I could sell you one of my boards. I ordered a few spares to experiment with them, but since you didn't forget/miss the GB but the mail system decided to mess with you, I'd be willing to help you out. Regards, Jokener
The Objective2 (O2) Headphone Amp - DIY Audio …
http://www.diyaudioblog.com/2012/01/objective2-o2-headphone-amp.html
The Objective2 (O2) Headphone Amp. People feel so strongly about audio reproduction that it often becomes akin to religion and politics and arguments ensue. Some listeners feel that a perfectly flat response curve and fully diminished THD levels (total harmonic distortion) are the holy grail, while there are others that enjoy the warm ...
O2 Headphone Amplifier GB | Page 9 | diyAudio
https://www.diyaudio.com/community/threads/o2-headphone-amplifier-gb.194708/page-9
1 PCB - UK. Search titles only By:
The O2 Amp | Tubelab
http://tubelab.com/prototypes/o2/
Prototypes — The O2 Amp. Experienced. I have been reminded more than once on the DIYaudio forums that this design is NOT a true Ongaku. The true Ongaku was a very well regarded amplifier designed and built in Japan using hand built silver capacitors and transformers.
NwAvGuy: O2 Headphone Amp
https://nwavguy.blogspot.com/2011/07/o2-headphone-amp.html
The official threads for this amp are: O2 on diyAudio – This is the best place for the DIY crowd to discuss building the O2, creative enclosures, add-ons, etc. O2 on ABI – AnythingButiPod is a great friendly site and it’s the best place for non-DIYers to discuss the O2. The more hardcore DIY guys are probably better off at diyAudio.
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