Speaker-Amplifier Connection - CABASSE PACIFIC 3 Owner's Manual

e n g l i s h
PACIFIC 3
UNPACKING
After opening the top carton flaps, fold the carton flaps right
back, remove the cardboard sheet, the bag of accessories and
the foam half-shells protecting the speakers and the front
grille. Then pull out the grill and the speaker. We suggest you
to retain the packing for future use.
These speakers are very heavy, so 2 persons minimum are
required to unpack and re-pack them.
POSITIONING
Speakers positioning
Our speakers have been designed to function in a vertical
position. Under these conditions, the polar response is most
uniform 2 .
The Pacific 3 model is delivered with a set of decoupling
spikes . These accessories are to be screwed in the inserts on
the base of the speakers after having removed the caps (turn
them anti-clockwise). Adjust the height of the spikes by using
the M4 Allen key delivered with the speakers. These accessories
ensure the stability of the speaker while limiting resonance co-
ming from certain types of grounds like wood floors.
Speakers are delivered with a front grille to protect drivers.
It is possible to use them without this front grille, by gently
pulling its top end in order to cut off its magnetic link with
the magnets to the front panel. To get the grill back in place,
position it in front of the speaker and approach it to the front
panel until the magnetic link is effective. These operations
must be carried out very smoothly in order not to damage
prematurely the veneer covering the magnets on the front pa-
nel of the speaker .
Powerful drivers generate magnetic fields that can extend
beyond the boundaries of the speaker cabinet. We recom-
mend you keep magnetically sensitive articles (CRT TVs and
computer monitors, computer discs, audio and video tapes,
swipe cards...) at least 1.5 ft (50 cm) away from the speaker.
Positioning speakers in a room
In addition to vertical position of the speakers themselves, their
location in the listening room, as well as the acoustical charac-
teristics of the room, are also very important. As it is impossible
to indicate a typical location of speaker systems without a few
tests, we suggest several general rules that are important to ap-
ply in order to obtain the best listening results.
Optimal positioning for a 2.0 or stereo system
For the ideal positioning of your speakers follow diagram.
If «d» is the distance between the two speakers, this distance
must be higher than 5 ft (1.5 m) and the two speakers must
be at equal distance from the listening area which forms with
them an equilateral triangle.
The drivers must be directed towards the listening area.
The speakers should be located so that their diffusion fol-
lows the longest dimension of the room.
Generally speaking it is better to avoid putting the speakers in
the corners of a room as this amplifies the low frequencies and
tends to enhance the room resonances. If possible it is better to
place the speakers at least 8 inches (20 cm) from the walls.
Moreover, in order to obtain a more accurate frequency res-
ponse, it is recommended to raise a compact speaker from 12
to 16 inches (30 to 40 cm) above the floor by placing them on
stands. The tweeters of the speakers must be roughly at the same
height of the listener's ear when the listener is in sitting position.
No solid object or piece of furniture should be placed
between the speakers and the listener. An effect of mask,
even partial disturbs completely the sound reproduction as it
attenuates the high frequencies and also, in most cases, the
midrange frequencies.
Placing the speakers in niches is not recommended. Unless
designed for this application, bookshelf placement will al-
ter the frequency response of the speaker, especially in the
low frequencies. If a bookshelf location cannot be avoid, the
speaker should be set up to minimize various resonance, and
the visible part of the grille must be outside the niche.

SPEAKER-AMPLIFIER CONNECTION

Cable section
To get the full sonic potential of Cabasse loudspeakers and avoid
power losses, the cables connecting the speakers to the power
amplifier must have the lowest possible electrical resistance. To
help you in choosing the minimum correct cable gauge, follow
diagram.
Maximal lenght
betweem recommended
amplifier and loudspeakers
Phases
In order to maintain the phase relationship and frequency ba-
lance of the loudspeaker system, both loudspeakers must be
properly connected to the power amplifier. When properly
connected, the cones of the drivers of both loudspeakers will
move in the same direction when driven by identical speakers
will move in the same signals. If the cones move in opposite
directions, the resulting out of phase signals will create a per-
ceptible power loss, particularly in the low frequencies. The
stereophonic message will also be degraded. Amplifier and
speaker manufacturers typically indicate connection polarity in
5
one of two ways: red and black or plus and minus. In either
case, always connect red or plus to red or plus and black or
minus to black or minus. Connections should be identical for
both channels. To check that the speakers are in correct switch
the system to mono while music is being played. if the ampli-
fier does not have a phase inversion switch, it will be necessary
to change over the connections on one only of the loudspea-
kers. If in correct phase, the image should be distinctly located
between the loudspeakers with a slight loss of bass and low
midrange level. If the image is confused and not centrally loca-
ted and there is a drastic loss of bass and low midrange level,
recheck your connections.
Section
4,5 m 1,5 mm 2
6 m 2 mm 2
7,5 m 2,5 mm 2
9 m 3 mm 2
12 m 4 mm 2