Page 2 of 2 FirstFirst 12
Results 16 to 17 of 17
  1. #16

    Stretch's Avatar
    Member Since
    Jan 13, 2007
    Central New York
    15in i7 MacBook Pro, 8GB RAM, 120GB SSD, 500GB HD
    You are using a headphone jack, not a line out jack. If the volume of the audio isn't high enough, or too high you are going to get fuzz on the line.

    Line out jacks have a constant voltage, usually around 1.4 volts for car stereo systems, headphone jacks don't have a constant voltage, it changes with volume, which is why headphone jacks aren't recommended for plugging into an amp. (Only using car audio system as example since I've worked a lot with them but principle is the same.)

    The reason the USB iMic works well is because it is a line out jack. Another cause for the hum could be a ground issue. If the audio cables are running too close to the ground wiring in your house, or the computer for that matter, it could be causing the hum. Since the iMic is an external card it wouldn't be affected as much.
    Blog and Photo Gallery:

    Currently running OS X 10.10

  2. #17

    Member Since
    May 21, 2011
    Thanks Stretch. I'll look into the USB iMic. As I described, just disconnecting the cable from the receiver and just plugging it into my M-Audio speakers there is no hum and they are designed to use headphone output (I checked it's doc) so I think the USB iMic will do the trick. :-)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Are Intel Imacs 32 or 64 bit??
    By Ricky55 in forum Apple Desktops
    Replies: 10
    Last Post: 03-04-2012, 10:18 AM
  2. Intel Centrino iMacs?
    By Artmuzz in forum Apple Desktops
    Replies: 7
    Last Post: 04-21-2008, 08:14 AM
  3. Front row with new intel imacs
    By Soccerji in forum macOS - Apps and Games
    Replies: 0
    Last Post: 02-08-2006, 02:00 AM
  4. divx / xvid on intel iMacs?
    By thestaton in forum Apple Desktops
    Replies: 10
    Last Post: 01-22-2006, 12:16 AM
  5. New Intel based iMacs and MacBook
    By Daniel 1989 UK in forum Apple Notebooks
    Replies: 6
    Last Post: 01-18-2006, 08:08 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts