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iMac onboard DAC vs. external? - Page 6

post #76 of 82
Quote:
Originally Posted by rigodeni View Post

Neither my E11 or my Bravo V2 have a pre-out :(

No, but that's not the problem anyway.  When you're comparing DACs, one issue is the internal gain of the DAC.  If took a tone at 0dBFS and ran the data to two different DACs, you probably will get different output levels from them which makes comparison impossible.  If at least one DAC had a means of output level control so you could make sure both DACs reproduce identical levels, then you can compare them properly.  bigshot suggested a preamp between one of the DACs to assist in level matching (balancing). Once you have both DACs level matched, you can connect them to your favorite amp. 

post #77 of 82

In the case of DACs, it is also important to synchronize them as accurately as possible.

post #78 of 82

I am getting an imac soon.  DO i need a dac/amp to power some good headphones like the lcd-2?
 

post #79 of 82
Probably not. My new iMac has a pretty powerful output.
post #80 of 82

Anyone have specs on that output? Who knows what output impedance it has and max output voltage it can do?

post #81 of 82

http://support.apple.com/kb/TA26045?viewlocale=en_US&locale=en_US

 

Don't think that's for the current model though.

 

Then there's this - late 2011 (scroll down a bit):

http://support.apple.com/kb/HT4619

 

And late 2012 (most recent except the new thin ones, which don't have their audio out specs published yet)

http://support.apple.com/kb/HT5522#1

post #82 of 82
Quote:
Originally Posted by jaddie View Post

 

And late 2012 (most recent except the new thin ones, which don't have their audio out specs published yet)

http://support.apple.com/kb/HT5522#1

 If its similar to that it won't go very loud especially with stuff like classical music.

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