Review: JDS Labs O2 (Black edition) + O2/ODAC discussion
May 30, 2013 at 2:17 PM Post #317 of 543
Adaptive DACs also have a buffer, just smaller. Instead of using their own clock they derive the clock based on multiple received frames. Plus you're probably just streaming 2 channel audio which doesn't need much bandwidth. Cheap cables can easily handle 30 times higher bandwidth. Don't waste your money.
 
May 30, 2013 at 11:18 PM Post #318 of 543
Hey guys, any suggestions for warm sounding amps that are below $200?
 
May 31, 2013 at 12:20 AM Post #319 of 543
Hey guys, any suggestions for warm sounding amps that are below $200?


I'm sure there are others but from personal experience the Hifiman EF2A is very warm and stupid powerful! It also has a built in DAC but I wouldn't really use it because its not very good. The Amp on the other hand is pretty good for the money. You could also find a used Headstage Arrow 3G for around $200.


Thanks,


D
 
May 31, 2013 at 12:25 AM Post #320 of 543
Quote:
Hey guys, any suggestions for warm sounding amps that are below $200?


I believe the Aune T1 is a warm sounding amp with a built in DAC that's supposed to be pretty good for under $200 on eBay.
 
May 31, 2013 at 10:21 AM Post #321 of 543
Thank you for the recommendations! The Aune T1 looks very interesting
smily_headphones1.gif
, what are the output impedances for the T1 or the Headstage Arrow 3g?
 
May 31, 2013 at 4:39 PM Post #323 of 543
Thanx to all of you.
- No need for an  expensive USB cable (to ensure a perfect timing and other blah-blah-blah's) for the ODAC.
- No need for an expensive line-out\line-in  cable (to connect  the ODAC with the O2) either.
 
The money I'm saving I'll use to buy a very good pair of headphones under $300.
 
 
JJ
 
May 31, 2013 at 7:24 PM Post #325 of 543
Can anybody tell me what the second button does on the O2's? Just got them right now. Is it the gain switch? If so is "pressed down" low gain and "unpressed" high gain or vice versa?
 
May 31, 2013 at 7:36 PM Post #327 of 543
The gain switch? It switches from low amplification to higher amplification, which is useful if you want to use a portable player or other weak sources (~1 V) instead of a dedicated source with ~2 V output.
 
May 31, 2013 at 7:54 PM Post #328 of 543
Thank you so much! I was afraid to use it because I didn't know what it was..so is high gain or low gain appropriate for a 300 ohm headphone? Moreover, is high or low gain appropriate for a 32 ohm headphone?
 
May 31, 2013 at 9:44 PM Post #329 of 543
Quote:
Thank you so much! I was afraid to use it because I didn't know what it was..so is high gain or low gain appropriate for a 300 ohm headphone? Moreover, is high or low gain appropriate for a 32 ohm headphone?

 
If the sound using the low-gain setting  is loud enough for you and you don't have to crank the O2 to full volume, use the low-gain setting. Otherwise, the high-gain setting is more appropriate. The impedance of the headphones isn't the appropriate criterion for choosing gain.
 
Even at low gain, the O2 will go far too loud for me with 32-Ohm headphones (Grado SR325i), 250-Ohm headphones (Beyerdynamic T70), and 300-Ohm headphones (Sennheiser HD-650) -- and the 650's impedance increases to nearly 500 Ohms at some frequencies.
 
May 31, 2013 at 9:47 PM Post #330 of 543
Quote:
Quote:
Thank you so much! I was afraid to use it because I didn't know what it was..so is high gain or low gain appropriate for a 300 ohm headphone? Moreover, is high or low gain appropriate for a 32 ohm headphone?

 
If the sound using the low-gain setting  is loud enough for you and you don't have to crank the O2 to full volume, use the low-gain setting. Otherwise, the high-gain setting is more appropriate. The impedance of the headphones isn't the appropriate criterion for choosing gain.
 
Even at low gain, the O2 will go far too loud for me with 32-Ohm headphones (Grado SR325i), 250-Ohm headphones (Beyerdynamic T70), and 300-Ohm headphones (Sennheiser HD-650) -- and the 650's impedance increases to nearly 500 Ohms at some frequencies.

I have it low gain on my Beyer DT880-600. And its at about 35% volume:D
 

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