Genelec G Three Operating Manual page 3

WARNING: ELECTRIC SHOCK HAZARD. DO NOT OPEN. DO NOT
SUBJECT TO WATER OR MOISTURE. NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
USE EARTHED MAINS CONNECTION ONLY.
AVERTISSEMENT: RISQUE DE CHOC ÉLECTRIQUE. NE PAS
OUVRIR. NE PAS EXPOSER À L'EAU OU L'HUMIDITÉ. AUCUN
COMPOSANT À L'INTÉRIEUR REMPLAÇABLE PAR L'UTILISATEUR.
ADRESSER TOUTE RÉPARATION À UN PERSONNEL QUALIFIÉ.
CET APPAREIL DOIT ÊTRE RACCORDÉ À LA TERRE.
LAITE ON LIITETTÄVÄ SUOJAKOSKETTIMILLA VARUSTETTUUN
PISTORASIAAN.
APPARATET MÅ TILKOPLES JORDET STIKKONTAKT.
APPARATEN SKALL ANSLUTAS TILL JORDAT UTTAG.
ON
OFF
G Three
Active Loudspeaker
MAINS INPUT
50 / 60 Hz 60 W
100 - 240 V~
MADE IN FINLAND www.genelec.com
SERIAL NUMBER
This device complies with FCC Part 15 and Canadian
ICES-003 radio frequency Class B emission requirements.
Refer to operating manual for full information.
Figure 1. The back panel layout of the G Three
Loudspeaker Mounting Position
Flat anechoic response
Free standing in a damped room
Free standing in a reverberant room
Near the listener on a table or other
reflective surface
In a corner
Table 1. Suggested tone control settings in some typical situations
Setting the tone controls
The frequency response of Genelec G Three,
G Four and G Five can be adjusted to match
the acoustic environment by setting the tone
control switches on the rear panel. The controls
are "Tabletop", "Treble", "Bass" and "Low
Bass". Table 1 shows some typical settings
in various situations. Figures 3, 5 and 7 show
the effect of the controls on the frequency
response.
Tabletop
It is recommended to activate this switch to
REFLEX PORT
THREADS FOR
CEILING AND
WALL MOUNTS
TONE CONTROLS
BASS
-4 dB
-2 dB
-6 dB
LOW BASS -4 dB
TREBLE -2 dB
TABLETOP
ISS
LEVEL -10 dB
LED OFF
CONNECTOR PANEL
(HORIZONTAL)
RCA INPUT XLR INPUT
Iso-Pod™ TABLE
STAND
Treble Bass
None None
None -2 dB
None -4 dB
None -2 dB
None -4 dB
'ON' when the loudspeakers are placed on a
table, desk or similar surface to minimise the
effect of such reflective surfaces between the
loudspeakers and the listener.
Such a placement typically causes a
boost in one region of the bass spectrum.
The "Tabletop" control compensates for this
unwanted sound colouration.
The "Treble" adjustment allows modifying the
high frequency response of the loudspeaker.
The G Three has one setting, -2 dB for
smoothening down an excessively bright
sounding system, the G Four and G Five
provide two attenuation levels, -2 dB and -4
dB and one boost setting, +2 dB.
The "Bass" control offers three attenuation
levels for the bass response in frequencies
below 1 kHz, usually necessary when the
loudspeakers are placed near room boundaries
or other situations when the bass sounds too
dominant. The attenuation levels are -2 dB,
-4 dB and -6 dB. On the G Three, the -6 dB
attenuation is selected by setting both "Bass"
switches to "ON".
The Low Bass control provides bass
attenuation at the lowest frequencies of the
loudspeaker's bass reproduction. This may
be necessary if these deep bass frequencies
sound disproportionally strong. The G Three
has one setting, -4 dB and the G Four and G
Five provide three attenuation levels: -2 dB, -4
dB and -6 dB.
The factory setting for all tone controls
is "0" to give a flat anechoic frequency
response. Always start adjustment by setting
all switches to "OFF" position. Measure or
listen systematically through the different
combinations of settings to find the best tonal
balance.
Low Bass Tabletop
None None
None None
Always place the loudspeakers so that they are
None None
aimed towards the listening position. Vertical
ON (-4 dB @
None
160/200 Hz) placement is preferable, as it minimizes
acoustical cancellation problems around the
-4 dB None
crossover frequency.
Check that the loudspeakers are placed
symmetrically, and at an equal distance
from nearby walls. The distance between
the listening position and each loudspeaker
should also be identical. If possible, place the
system so that the listening position is on the
centerline of the room but not in the middle of
the front-back room dimension.
Treble
Acoustic reflections from objects close to the
loudspeakers like desks, cabinets, shelves,
computer monitors etc. can cause unwanted
blurring of the sound image. These can be
Bass
Low Bass
Mounting considerations
Align the loudspeakers correctly
Maintain symmetry
Minimize reflections