Installation; Connections; Lfe Input; Digital Input/Output (Digital) - Focal Electra SW 1000 Be User Manual

INSTALLATION

U s e r m a n u a l
16

Connections

Low-level inputs on RCA
When using a two-channel, stereo amplifier with preamplifier line outputs, the Electra SW 1000 Be must be
connected through RCA stereo inputs "line inputs Right/Left" . This configuration is better than that of
(fig. A)
the high-level inputs and will deliver a cleaner sound.

LFE input

When using an audio/video, multi-channel amplifier, the single LFE input of the Electra SW 1000 Be should
be connected to the mono "Subwoofer" output of the audio/video amplifier .
(fig. B)

Digital input/output (Digital)

Several Electra SW 1000 Be can be digitally connected to greatly increase sound pressure levels. The first
"master" subwoofer receives the analog signal from the source unit and then drives in the digital domain as
many additional "slave" subwoofers as deemed necessary. This permits all the settings and corrections on the
master subwoofer to be systematically applied to the slaves (whose control menus are partially deactivated).
Only gain and phase are accessible. The digital connection is serial from one subwoofer to the next .
(fig. C)
Volume control of slave subwoofer is synchronized with master subwoofer.

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 Electra SW 1000 Be in a corner of the
listening area . If the subwoofer is placed against only one wall or too far from the walls, the very
(fig. E, F)
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 Electra SW 1000 Be 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. D)
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 Electra SW 1000 Be behind a piece of furniture as long as the bass
frequency dispersion is not affected.

Magnetic disturbance

The Electra SW 1000 Be generates a magnetic field that may interfere with other sensitive household appliances.
It is strongly advised to not place the Electra SW 1000 Be closer than 50cm (20") to your TV screen. Frame
geometry as well as colours can be severely distorted by a magnetic field if the loudspeaker is placed to close
to the cathode ray tube. Generally, all sensitive media (audio tapes, video tapes, magnetic data storage,
projector and CRTS overhead-projector) should not be placed close to any non-shielded loudspeaker.