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Floor EffectBodeneffektEffetto pavimento

Floor Effect

Bodeneffekt

Effetto pavimento

Stacks Image 3788
Having an opening to the floor, the bass level of the speaker can be tuned changing the height of the loudspeaker to the ground. This effect applies both to bass horns and to bass reflex ported to the ground. To better understand this behavior, You can look the picture above. This picture is just a qualitative frequency response curve, does not pretend to be accurate and mean something different than a rough description of an effect.

In this picture You can recognize this behavior:
Curve 'Higher': indicates the rough frequency response of the loudspeaker in the standard floor distance position
Curve 'Lower': explains how the lowering of the loudspeaker changes the frequency response

Normally setting a loudspeaker near the wall ('Wall effect on higher', dotter line) brings an increase in the bass frequencies that sometimes tend to disturb the proper music listening. This can be tuned lowering a little bit the loudspeaker ('Wall effect on lower', dashed line).

In certain circumstances, an additional advantage of this feature resides in the fact that if Your room does have some nasty modes in the bass propagation, this could be partially solved using this feature of the loudspeaker.