The invention relates to a defrosting duct (17) for a motor vehicle, the defrosting duct (17) comprising a body which has a trough (23) and is intended to be attached to a dashboard panel, the defrosting duct (17) being characterised in that it comprises at least one loudspeaker bowl (25) and in that at least one loudspeaker bowl (25) is made in one piece with the body. A loudspeaker seat (29) can be attached if necessary to the loudspeaker bowl (25) before the defrosting duct (17) is attached to the dashboard panel, preferably by a step of ultrasonic or vibration welding.
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