Hooking up JBL speakers to iMac G5!?

Hey,
I just bought a sweet pair of JBL speakers and I was looking forward to hook them up on a Pioneer amplifier than connect it with RCA to 1/8 cable (from iPod kit) to my iMac.
Is there a slight chance to damage the power supply or something in the iMac or is it totally safe? I just want to make sure before I hook it up!!!
Thanks!!!

The iMac's output jack is meant for driving low power items like headphones or amplified speakers, so its maximum output power is in the milliwatt range. If your speakers aren't self-powered (they will have some power source like batteries or a power plug if they are), the iMac will not be able to supply enough power to play them at more than whisper levels without lots of distortion.
So, using an amp will sound much better with unpowered speakers, particularly if both are high quality, high fidelity components like the topic's author is talking about.
However, if your speakers already are amplified (self-powered), just plug them into the iMac directly. There is nothing to gain by adding a power amp unless you can connect directly to the speakers.

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