Head-Fi.org › Forums › Equipment Forums › Sound Science › My M-Audio Soundcard Outputs To Headphone Amp? Impedance Issues?
New Posts  All Forums:Forum Nav:

My M-Audio Soundcard Outputs To Headphone Amp? Impedance Issues?

post #1 of 6
Thread Starter 

Alright guys, so i've been trying do some research in this part of the forum but everything has been so over my head. Basically i realize usb DAC seems to be a lot more popular here but i already have a m-audio 192 sound card installed into my computer. I am looking to get back into some home recording so i want to keep this card for that purpose. My headphone amp selection isn't set in stone but i'm fairly certain ill be going with the Schiit Magni. Essentially my chain would be like this

M-Audio 192 > Dual 1/4" Ts to RCA cables > Schiit Magni > Headphone

I know these outputs are generally for hooking up studio monitors, so i'm just not sure if there is any conflict there. I pasted the specs for the outputs below. 

 

main outputs
 
max output (balanced): +14dBu (3.9 Vrms)
 
max output (unbalanced): +8dBu (1.95 Vrms)
spacer.gif
signal to noise ratio: -108dB @ 48kHz (A-weighted)
spacer.gif
dynamic range: 109dB @ 48kHz (A-weighted)
spacer.gif
THD + N: 0.0023%, 1kHz, -1dBFS @ 48kHz
spacer.gif
frequency response: +/-0.1dB, 20Hz to 20kHz @ 48kHz
spacer.gif
crosstalk: -105dB, 1kHz, channel-to-channel
spacer.gif
impedance (balanced): 300 Ohms
spacer.gif
impedance (unbalanced): 150 Ohms

 

If there is a problem i could buy the modi as well and hook it up through spdif...I was just trying to save the $100 for now.

post #2 of 6

What do you mean with impedance issues? This setup should work.

post #3 of 6
Thread Starter 

Well to compare the Schiit dac's list their output impedance at 75, which is alot less then what my outputs show. 

I may have just been over-thinking this whole situation.

post #4 of 6
Output impedance isn't much of an issue when driving an amplifier.

This 1.95V unbalanced output will be fine.
post #5 of 6

100 ohms output impedance is normal for line-outs. The line-out just has to drive the line-in, which is usually around 10k ohms.

 

In other words, the output impedance is a lot smaller than the load impedance so everything's fine.

 

 

On an unrelated side note: the magni has a gain of 5x, so if you have a (very) sensitive headphone you should probably get an amp with lower gain.


Edited by xnor - 2/11/13 at 3:29pm
post #6 of 6
Thread Starter 

Well that does indeed clear it up a bit for me. thanks! 

 

As far as headphone i'm still a little undecided but i'm leaning towards AKG K702 65th anni. edition. But i have plenty of more reading to do around here!

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Sound Science
Head-Fi.org › Forums › Equipment Forums › Sound Science › My M-Audio Soundcard Outputs To Headphone Amp? Impedance Issues?