Ipod -ibook And Amplifiers, Problems to amplify correctly Ipod/Ibook Options

[Eole]

Hi
When I to connect my Ipod (via the dock) or my Ibook to my amplifier (Harman Kardon), the sound volume is VERY low and to be able to get a high level volume I end up having to increase the volume of to 30db, which is not normal and produces a lot of bass vibrations. This happens with all audio sources (Itunes, Garage band, realplayer, Band in a box)

I have tried connecting my Ipod to another amplifier (NAD) and there is no volume problem.
I have tried all 'in' ports, but it makes not difference
What am I doing wrong ? Is there a special cable besides a standard Audio Stereo Jack ?

thanks
Eole

[pgroves]

This may sound obvious, but have you checked that output volume of the iPod is set to maximum (though I presume you have if it sounds fine through the NAD amp). Also which set of RCA inputs have you connected it to on the Harmon Kardon amp? This must be a line-level input such as AUX, TUNER, CD or TAPE IN, not Phono.

As far as cable does, any ordinary 3.5mm jack to twin phono lead (or a twin phono lead with a 3.5mm adaptor) should be fine.

hope this helps

Paul