AUX cable in Alpine HU problem

[_HighVoltage_]

Hello, I'm new to this forum

I got an AUX cable for my Alpine CDA-9851 headunit the other day. It's the Ai-Net interface on one end and a typical 3.5mm stereo jack on the other.

Plugged it in, connected my iPod and immediately noticed a problem. It's extremely quiet. Sound quality is okay, stereo is there, but very very quiet.

Then by accident I touched the metal case of my iPod and as soon as I touched it - the sound became properly loud.

Sounds like a grounding issue, but I haven't had any other problems with the HU so far. Isn't it already grounded? Any ideas how to fix this problem?

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