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Here are all the possible meanings and translations of the word headroom. Princeton's WordNet(0.00 / 0 votes)Rate this definition: headroom, headway, clearance(noun) vertical space available to allow easy passage under something. headroom, dynamic headroom(noun) the capacity of a system to reproduce loud sounds without distortion. headroom(Noun) the vertical clearance above someone's head, as in a tunnel, doorway etc. headroom(Noun) the ability of a system to reproduce loud sounds free of distortion; dynamic headroom.
The head unit provides an audio signal, the amplifier boosts it, and the speakers actually produce the sound. These components are highly dependent on one another, and the overall quality of a car audio system is determined by how they interact. The Head Unit.