HT4619 Imac and external speakers....

Well, I just took out iMac which is brand new (Xmas present from year 2008) and not used, together with external speakers-type JBL spot  and noticed that there is no sound. The installation is by the book....I was trying to register the speakers - and noticed that the site did not exist..
JBL-the site does not list the product type Spot ? gone out of business? I would be grateful if someone has any idea what went wrong? One would expect that it is plug and play with this kind of combination:)?

Hello, no idea really on the speakers, are they amplified?
Long shot, but...
Open Audio Midi Setup in Applications>Utilities, see the input & output options & KHz setting there.
Also see system Preferences>Sound>Output potions.

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