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Objective 2 (and O2+ODAC) Impressions Thread
Jun 13, 2014 at 3:21 AM Post #20 of 92
I love my O2+ODAC combo from Epiphany Acoustics with my HD-800. When I heard about Aune T1 as a cheap contender I got one to try out but was dissapointed in comparison between them. The O2 drives HD800 better than the T1. O2 sounds wider and more relaxed and I can push the volume a lot higher (higher than I can stand). T1 at max volume seems to be 60-70% of O2's max volume. Also, the T1 sounds a little bit brighter.
 
Jun 14, 2014 at 7:38 AM Post #21 of 92
Cannot agree more on O2+ODAC combo.
I've purchased it from NwAvGuy, about a year ago, then unfortunately it took me about half year to find time for soldering it, but when I did, It just kept me smiling all the time I was listening to it. The reason to get it originally was a need for an amplifier for LCD2, but it eventually rediscovered most of my other cans.
The combo is really hard to beat.
 
Jul 20, 2014 at 1:19 PM Post #22 of 92
Where in the USA or on eBay, can I find the best price on a power adapter for a JDS O2 headphone amplifier?
Or are there any advantages for paying a few extra dollars for a good quality adapter?
 
Jul 21, 2014 at 7:35 PM Post #23 of 92
Aug 10, 2014 at 4:50 AM Post #24 of 92
I'm considering getting the O2 (non dac, going a custom O2 with 6mm jack, rear mount power & RCA input :p) for my DT880 250ohm from JDS I just have 2 questions

Would the standard gain 2.5x - 6.5x be fine for my headphones?

Do they include the AU power adapter plug thingy or do you have to buy that separate?

Thanks :L3000:
 
Aug 10, 2014 at 5:29 AM Post #25 of 92
I can't help you with the power adaptor question but those gains will drive just about anything. My HD 650 is 300 Ohm and my gains of 1x/3x are plenty.
 
Aug 10, 2014 at 6:59 AM Post #26 of 92
Thanks :beerchug:

So would any gain be fine or are there recommended gain setups for different headphones? dont mind me I'm a n00b :xf_eek:
 
Aug 10, 2014 at 7:36 AM Post #27 of 92
Well I'm no expert but generally speaking the higher the resistance of headphones (measured in Ohms) the more gain is required. I think 600 Ohms is the general max and possibly that's where gains of 5x would be useful. If you know that your Beyer's are an end-game then I would suggest gains of 1x/3x will do the job nicely. However, if you're planning on getting some 600 Ohm headphones further down the line then you might want more.

Where are you going to buy the O2 from?
 
Aug 10, 2014 at 7:52 AM Post #28 of 92
Ah ok, well I would love the HD800s but I dont think I'll be getting them :p so yeah Beyer's are probably gonna be end of the line or maybe some other 250ohm headphones

Um probably direct from JDSLabs website, as I said earlier I'm going to get a fully customized one
 
Aug 11, 2014 at 4:36 AM Post #29 of 92
Check this out...

http://www.head-fi.org/t/730167/do-i-need-an-amp-well-im-glad-you-asked/0_40#post_10787299
 
Aug 19, 2014 at 10:45 PM Post #30 of 92
solrighal said:
Check this out...

http://www.head-fi.org/t/730167/do-i-need-an-amp-well-im-glad-you-asked/0_40#post_10787299
Click to expand...


Thanks, had a look, still gonna get the O2 :D

Just a quick question before I order, if I get the 2.5 x- 6.5x gain can I open it up and change the resistors out to change the gain? it doesnt bother me much if I have to resolder
 
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