Welcome, Guest. Please login or register.

Login with username, password and session length


Author Topic: full-scale voltage of MacBook  (Read 8507 times)

0 Members and 1 Guest are viewing this topic.


  • Newbie
  • *
  • Posts: 1
    • View Profile
full-scale voltage of MacBook
« on: November 14, 2007, 02:51:42 AM »
Hello  :-D

i want to measure the maximum output voltage from a MP3-Player with my MacBook 2 GHz. Do you know the full-scale voltage of this Computer-Audio-Input?

Thanks ...


  • Administrator
  • Sr. Member
  • *****
  • Posts: 320
    • View Profile
    • www.FaberAcoustical.com
Re: full-scale voltage of MacBook
« Reply #1 on: November 14, 2007, 11:53:05 AM »
On the original 17-inch MacBook Pro, the full-scale voltage is 4.4 Volts.  Apple's hardware tech notes for developers suggest that the MacBook uses different circuitry, so your full-scale voltage may be different.  If you have an AC voltmeter, you can use it to calibrate your MacBook's built-in audio input.  Of course, your calibration will only be as precise as the voltmeter you use.