O2 AMP + ODAC
Dec 25, 2014 at 3:49 PM Post #3,781 of 5,671
Dec 25, 2014 at 6:22 PM Post #3,783 of 5,671
I thought you were joking.

I've never heard the ODAC+O2 described as having a "warm glow".

It's cool if that's the way you hear it, but I think most people describe it as pretty transparent.  


Sorry, I was meaning the warm glow you get from not buying the mainstream options out there and going with something actually proven to be transparent.
 
Dec 25, 2014 at 8:21 PM Post #3,784 of 5,671
  What do you think of keeping a cable like this plugged in to preserve the life of the headphone-out jack?
 
http://www.amazon.com/dp/B00GZQWI6C/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=1FCJ214026JGQ&coliid=I3D8OO5EGSGB3W&psc=1
 
I'd rather have an adapter to keep plugged in rather than deal with a long cable. Any recommendations?

I do this with a similar cable and or sennheiser 3.5mm to 1/4" pigtail adapter. I secure the cable/adapter to my desk with masking tape. Can't tell you how many times it has probably saved my output jack.
 

 

 
 
Sorry, I was meaning the warm glow you get from not buying the mainstream options out there and going with something actually proven to be transparent.

Hah, easy misunderstanding. 
 
Dec 26, 2014 at 2:19 PM Post #3,786 of 5,671
I've stuck the o2 to the table (with 2 little straps you use to hang stuff without piecing the wall). and the O2 is facing the direction I take when I go out of the room, so the only result of me being an idiot(and it happened quite a few times already) end up with the headphone unplugged on a straight axis.
but I can certainly understand the concern.
 
Dec 26, 2014 at 3:06 PM Post #3,788 of 5,671
  "and it happened quite a few times already..."

 
Welcome to my world
dt880smile.png

 
Dec 27, 2014 at 1:39 AM Post #3,791 of 5,671
Would 1x/2.5x gain be enough for o2+odac or should I go for 1x/3.5. Using hd650s. Thanks

I have mine at 1x/2.5x and I almost always find it enough.. But, I don't think I would mind having 1x/3.5x. 

I usually stay on 1 unless I'm using a source other than my odac.. such as a sansa clip. At such times, I wish I had more than 2.5x on very quiet recordings.
 
1x/3.5x sounds pretty choice to me, I wish mine was like that.
 
Dec 27, 2014 at 6:17 AM Post #3,792 of 5,671
I have gains of 1x / 3x and rarely use the higher gain.
 
Dec 27, 2014 at 6:46 AM Post #3,793 of 5,671
What's the ideal max volume pot position on the O2? If 5 o'clock is the max, is 2, 3 or 4 ideal with still headroom left for dynamic peaks? Been reading Nwavguy's blog site and he didn't mention it (I might have missed it).
 
Dec 27, 2014 at 6:55 AM Post #3,794 of 5,671
IIRC the best position is 12 o'clock.

Can anyone find how much power the o2 puts into 300ohms? It would make the gain decision much easier, but taking a guess with 97db/mw the hd650 has you should be able to reach peaks of 120db. Again that is peaks, so if a track is mostly -30 db, then unity gain should be enough. I can see how more gain might be useful in some situations but 3.5x seems ear damaging.
 
Dec 27, 2014 at 7:17 AM Post #3,795 of 5,671
IIRC the best position is 12 o'clock.

Can anyone find how much power the o2 puts into 300ohms? It would make the gain decision much easier, but taking a guess with 97db/mw the hd650 has you should be able to reach peaks of 120db. Again that is peaks, so if a track is mostly -30 db, then unity gain should be enough. I can see how more gain might be useful in some situations but 3.5x seems ear damaging.


P=U^2/R assuming a purely resistive load (which is a gross simplification with most headphones).
 

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