7 Replies Latest reply: Jan 16, 2012 12:03 AM by battlejoyce
loscamos Level 1 Level 1 (0 points)
I'm going to buy a new pair of headphone. I need to know the impedance of MacBook Pro

MacBook Pro, Mac OS X (10.6)
  • 1. Re: Output impedance MacBook Pro
    DaddyPaycheck Level 6 Level 6 (16,035 points)
    If I am not mistaken, the headphones will by the device creating the impedance and not the MBP.
  • 2. Re: Output impedance MacBook Pro
    loscamos Level 1 Level 1 (0 points)
    But the MacBook Pro lika the iMac have an impedance output. I need to know, because my imac have an output impedance of 24 Ohm and if I buy a pair of headphone with 70 Ohm the audio won't be good. I need to know MacBook impedance to find a good compromise between headphone and my 2 Mac.
  • 3. Re: Output impedance MacBook Pro
    DaddyPaycheck Level 6 Level 6 (16,035 points)
    Unfortunately I don't have the answer then. I did take a look at the specifications for your machine but there is nothing listed for audio impedance, but I am guessing that you may have already known that.
  • 4. Re: Output impedance MacBook Pro
    tjk Level 7 Level 7 (24,150 points)
    Hi l,

    I don't know which MPB you have, but I know of one person who measured his MBP and stated that it is 22ohms; if that's the case, the same headphones should be good for both of your Macs.

    Another way to approach it is to use something like this:

    http://shure.com/PersonalAudio/Produ...vel_attenuator
  • 5. Re: Output impedance MacBook Pro
    loscamos Level 1 Level 1 (0 points)
    I have a 32Ω headphone and the audio volume is perfect. I tried a 70Ω headphone and to it's impossible to listen a song the volume is tooooo quite.

    It's difficult to find some professional headphone with 32Ω.
    I found the Sony MDR-V700DJ with 24Ω and the Shure SRH840 with 44Ω.
    Wich one would you choose? 24Ω it's loud 44Ω it's loud. It's an hard choise.

    I have to use it also with the iphone
  • 6. Re: Output impedance MacBook Pro
    tjk Level 7 Level 7 (24,150 points)
    If 32 is good, but that's not an option, I'd go with the 24. You can always turn it down.
  • 7. Re: Output impedance MacBook Pro
    battlejoyce Level 1 Level 1 (0 points)

    FYI, I got a macbook pro late 2008.

     

    I got several headphones :

    - sennheiser HD 25 SP, impedance 85 ohms, I got no pb with sound, loud and clear. (and absolutly no problem with my iPod)

    - sony md4509HD, impedance 24 ohms, sound ok but I can hear "ground noise" (must have a poor electrical installation or maybe it is because of my PLCs). anyway, it makes it useless !!!

     

    So, be careful with low impedance and ground noise.