Level Control - Genelec 4020C Operating Manual

Figure 1: Location of the acoustic
axis
+
–
NON-
INVERTING INVERTING
Figure 2: Audio input pin sequence

Level control

The input sensitivity of the loudspeaker can be
matched to the output of the signal source by ad-
justing the level control on the rear panel.
Setting the tone controls
The frequency response of the Genelec 4020C
can be adjusted to match the acoustic environ-
ment by setting the tone control switches on the
rear panel. The controls are "Treble Tilt", "Bass
Tilt" and "Bass Roll-Off". An acoustic measuring
system such as WinMLS or comparable is recom-
mended for analyzing the effects of the adjust-
ments, however, careful listening with suitable
test recordings can also lead to good results if a
test system is not available. Table 1 shows some
examples of typical settings in various situations.
ACOUSTIC
AXIS
Figure 3:
Control and
connector
layout.
GND
GROUND
Figure 4: Cable connection for daisy-chaining speakers
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.
SUGGESTED TONE CONTROL
SETTINGS
-6 dB BASS -6 dB BASS
FREE STANDING IN A ROOM: FREE STANDING IN A ROOM:
TILT TILT
ALL TONE CONTROLS OFF ALL TONE CONTROLS OFF
-4 dB BASS -4 dB BASS
TILT TILT
MAINS INPUT 4020C
50 / 60 Hz 60 W
ACTIVE
100 - 240 V~
SPEAKER SYSTEM
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.
+
–
GND
Figure 5 shows the effect of the controls on the
anechoic response.
Treble Tilt
The Treble Tilt control (switch 2) boosts the treble
response of the loudspeaker at frequencies above
4 kHz by +2 dB, which can be used for compensat-
ing for the high frequency loss occurring at long
listening distance, off-axis listening or when the
loudspeaker is placed behind a screen or decora-
tive cloth.
Bass Tilt
The Bass Tilt control offers three attenuation levels
for the bass response of the loudspeaker below
2 kHz, usually necessary when the loudspeakers
are placed near a wall or other room boundaries.
REFLEX PORT
THREADS FOR
CEILING AND
WALL MOUNTS
TONE CONTROLS
ON ON
OFF OFF
ISS ISS
TREBLE TILT +2 dB TREBLE TILT +2 dB
BASS ROLL OFF -4 dB BASS ROLL OFF -4 dB POWER SWITCH
-2 dB -2 dB
BASS TILT -4 dB BASS TILT -4 dB
-6 dB -6 dB
SENSITIVITY CONTROL
SIGNAL
INPUT
CONNECTOR PANEL
-
+ GND
(HORIZONTAL)
3