External Speakers

Question

I have Altec Lansing powered speaker system connected to my iMac the system functions ok, however, when I access System Preferences and open Sound and click on Output only the following two items are listed
                      Select a Device for Sound Output
                 Name                                                        Type
Speakers                                  Built-in
Internet Phone by Tigerjet             USB
My Altec Lansing speakers are not in the list of output as stated below which is extracted from the help (?) section. Consequently, I am using this medium to solicit assistance on how I can proceed to have my iMac recognize my Altec Lansing powered speaker. All comments and suggestions will be greatly appreciated
Option
Description
Select a device for sound output
To listen through your computer’s built-in speakers, select Internal Speaker.
To listen through your display’s built-in speakers, select Display Audio.
To listen through speakers or headphones that are connected to the headphone jack, select Headphones.
To listen through external USB speakers, select your speakers from the list.
To listen through another audio interface, select it from the list.

Answer 1

Hi Folks,
I have corrected the problem, I had the speakers connected to the wrong port it was connected to the Audio in/optical digital audio in port instead of the Headphone out/optical digital audio out port. I sincerly apologize for any inconvenience cassed