speaker problems

[James Baumann]

Boy, getting a new computer is lots of fun.

I have a set of 2 Yamaha speakers and a subwoofer that I used on my PowerMac 
G3 to great success.  I now have a G4 tower and, lately, they have been 
giving me troubles.  In some - not all cases - the vocal part of an audio 
mix is almost completely mute while the rest of the song sounds relatively 
normal.

This can happen when I'm playing an audio CD or MP3 out of iTunes and it has 
also happened when the kids are playing a game or something from a CD (two 
examples - Tony Hawk skateboarding and They Might Be Giants NO! interactive 
disc).  When I unplug the speakers the sound mix is fine through the tower 
speaker.

The real bitch of it is that it comes and goes.

Doesn't look like there are any options in the Sound System Preference.  Is 
there some other setting I'm missing?  And I do have the speakers plugged 
into the correct port because the plug won't fit in the Apple speakers port. 
  This isn't a trick to get me to buy Apple speakers is it?  Or is it just 
simply my speakers are on their way out?

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