USB DAC/Amp with mic input jack?

  1. killeraxemannic
    The mic voltage has nothing to do with the sound quality output of the unit itself or driving headphones or anything related. I am not concerned with that. In fact I am sure it is fine for my headphones sound quality and sound output wise. What I am concerned with is that most creative devices I have tried under volt the microphone so you don't get a good microphone sound. Headset microphones require power between 2 and 5 volts that the microphone output provides. All creative sound cards I have tried sound horrible when using the mic because they only put out the bare minimum 2 volts to the microphone. As the main purpose of this will be that I am going to be using it for chatting with co workers on Skype I have to have a device with a good microphone input.
  2. ProtegeManiac Contributor
    If that's how it works then yeah, it works as a DAC-HPamp.
  3. Music Alchemist
    Hmm. So I guess even if I tested a cheap microphone I have with the E1 (as well as the microphone input of my laptop), that wouldn't tell you anything, since headset microphones apparently require more power. But then again, I thought that since the microphone input and left headphone output use the same jack, they would have the same available power for both.
  4. killeraxemannic
    Well putting constant voltage to headphones is not something that you would want to do so I would assume they have a way to turn off the constant voltage when you plug in headphones. Most likely a switching circuit of some kind that detects if a mic or a headphone is plugged in based on the impedance.
  5. Music Alchemist
    Isn't the volume of the microphone controlled by the volume you set on the amp? (And computer, software, etc.)
    Both of the headphone outputs function in the same way: you just control the volume with the slider.
    My research indicates that microphones do not have impedance any lower than headphones, and often much higher.
    But I think I just figured it out. Looks like you need to configure that jack as either headphone or microphone with that software, and the E1 has to be connected via USB.
  6. killeraxemannic
    Correct. So in the way of a microphone or at least a condenser microphone... All headset mics are mineature condenser mics btw.... The more constant voltage you put to it the more sensitive it is... So the more it picks up. When you adjust the microphone volume slider you are boosting input gain which is what causes the white noise you hear in the background of some people's mics. So the ideal scenario for the best microphone sound is to have the highest constant power voltage put out to the microphone so it is as sensitive as possible so you don't have to boost the input gain to get good mic levels. Creative for whatever reason is horrible for this (at least the creative cards I have tried) and only puts out 2V to the microphone so you have to max the input gain to get proper mic volumes.
  7. zgtc
    If you laptop has a digital out inside the 3.5mm headphones output (macs do) you would only need a cable minitoslink to toslink, and a dac that accepts toslink input
  8. killeraxemannic
    How do I connect the toslink to the mic? The whole idea is so that I can plug in a mic
  9. zgtc
    Sorry i imagined you plugging the mic to the laptop ang getting the sound from it before seding it to the dac
  10. selvakumar
  11. AltCtrl
  12. selvakumar
  13. AltCtrl
    How would you compare it to the Mayflower Arc and more expensive DACs like the Gustard X20?

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