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13
Connections
Sopra connectors provide reliable, multi-purpose contacts for stripped cables (up to 4mm diameter), fork terminals
or banana connectors. It is imperative to respect the connector polarity of both the loudspeaker and the amplifier. The
connector marked “+” must be connected to the positive output on the amplifier and the connector marked “-” must
be connected to the negative terminal (fig. A). Stereo image and bass perception would be seriously compromised if
these conditions are not respected. Choose good quality cables with a cross-section appropriate to their length: your
retailer will be able to advise you.
Positioning
These loudspeakers have been designed to deliver the most faithful reproduction of all kinds of music or home
cinema programmes. Nonetheless, we recommend following these simple rules to optimise their performance and
to guarantee good tonal balance and a realistic sound image.
The loudspeakers should be positioned symmetrically, facing the listening area, ideally forming an equilateral
triangle with it. However, these distances may be adjusted to find the ideal compromise according to the design of
your interior (fig. B).
The loudspeakers should be positioned at the same height, in the same horizontal plane. Ideally, the tweeter
should be positioned at the same height as the listener’s ears in the usual listening position (fig. C).
Do not position your loudspeakers too close to a corner of the room and do not place them too close to a wall. This
will induce some unwanted room resonance and artificially increase bass response. On the other hand, if the bass
level is considered to be insufficient, you could try moving the loudspeakers nearer a wall to re-balance the bass
level (fig. E).
Optimisation
For perfectionists, here is a formula for optimal positioning:
If A is the distance from the centre of the woofer to the nearest floor or wall, B is the distance to the next closest
floor or wall, and C is the greatest distance (A < B < C), the equation B
2
= AC defines the ideal loudspeaker position.
• Example:
If the centre of the woofer is 20” (50cm) away from the rear wall (A) and 24” (60cm) above the floor (B), then the side
wall will be ideally 28” (72cm) away [C = B
2
⁄ A = 28” (72cm)] (fig. D).
Our policy of continual product improvement means that Focal-JMlab reserves the right to modify the technical specifications of its products without notice.
Product may vary from images.
SOPRA
™
User manual
English
Please validate your Focal-JMlab warranty,
it is now possible to register your product online: www.focal.com/warranty
Notice_Sopra_CODO1482_V2.indd 13 14/03/2019 15:58:33
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