Focal SUB 500 P HP User Manual page 18

SUB 500 P HP
U s e r m a n u a l
18
connections
low level inputs on rcA
When using a two-channels amplifier with pre-out line outputs, the subwoofer must be connected through RCA
stereo inputs "line inputs right/left" (fig. A).
lfe input
When using an audio/video, multi-channel amplifier, the single LFE input should be connected to the mono
"Subwoofer" output of the audio/video amplifier (fig. B).
Positioning
Contrary to conventional, hi-fi loudspeakers, which have to be placed at a reasonable distance from the walls and
the listening area corners, we recommend placement of the subwoofer in a corner of the listening area (fig. C, D).
If the subwoofer is placed against only one wall or too far from the walls, the very large wavelength of the bass
delivered by the subwoofer will excite the resonance of the listening room in an unpredictable way. Frequency
response linearity will then be compromised and sound rendition will be affected (lack of depth, "boomy sound",
poor bass, difficult or impossible coupling with the other loudspeakers). If you put the subwoofer in a corner, the
resonant frequencies of the room will be more linear and predictable. In such a configuration, you will not only
benefit from an optimum perception of the bass frequency range but the bass level will also increase by 6dB (fig. E).
If a particular disposition of the room does not allow placement of the subwoofer in a corner, we recommend that you
try different configurations until you find the best possible sound. Generally, the subwoofer should be placed along
the front wall of a listening room. As bass frequency waves are omni-directional, the sound dispersion will not be
affected if a piece of furniture or an object is placed between the subwoofer and the listening area. It is then possible
to hide the subwoofer behind a piece of furniture as long as the bass frequency dispersion is not affected.