1238CF
Operating Manual
Genelec 1238CF
DSP Loudspeaker
Introduction
the interference by one or more of the following measures:
Congratulations and a thank-you for the purchase of this Genelec 1238CF DSP Loudspeaker. This loudspeaker is designed to
integrate easily into the digital production environment. There are
several ways to configure and operate the DSP loudspeaker for a
wide variety of high quality audio applications. The 1238CF also
has an analog input, making it a versatile and intelligent replacement for analog loudspeakers.
This manual addresses setting up and using the 1238CF DSP
loudspeaker in stand-alone mode without the Genelec Loudspeaker Manager GLM™ and the proprietary Genelec loudspeaker control network. Use with the GLM™ is described in the
DSP System Operating Manual.
EC Declaration Of Conformity
This is to certify that Genelec 1238CF DSP loudspeakers conform to the following standards:
Safety: EN 60065: 2002 + A1: 2006 + A11:2008 / IEC 60065:
2001 7th Edition + A1: 2005
EMC: EN 55020: 2007, EN 55013: (2001) + A1: 2003 + A2: 2006
EN 61000-3-2 (2006) and EN 61000-3-3 (1995) + A1: 2001 +
A2: 2005
The products herewith comply with the requirements of The Low
Voltage Directive 2006/95/EC, EMC Directive 2004/108/EC and
Energy related Products (ErP) Directive 2009/125/EC.
Signed:
Ilpo Martikainen
Position: Chairman of the Board
Date: 30-September-2010
Compliance to FCC Rules
This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician
for help.
Modifications not expressly approved by the manufacturer could
void the user’s authority to operate the equipment under FCC
rules.
Safety Considerations
Although the 1238CF has been designed in accordance with
international safety standards, to ensure safe operation and to
maintain the loudspeaker under safe operating conditions, the
following warnings and precautions must be observed:
• Servicing and adjustment must only be performed by
qualified service personnel. The loudspeaker enclosure
must not be opened.
• Do not use this product with an unearthed mains cable or
a mains connection without the protective earth contact as
this may lead to personal injury.
• To prevent fire or electric shock, do not expose the unit to
water or moisture.
• Do not place any objects filled with liquid, such as vases on
the loudspeaker or near it.
• Note that the amplifier is not completely disconnected
from the AC mains service unless the mains power cord is
removed from the amplifier or the mains outlet.
• Free flow of air behind the loudspeaker is necessary to
maintain sufficient cooling.
• Do not obstruct airflow around the loudspeakers.
• Note that the amplifier is not completely disconnected
from the AC mains service unless the mains power cord is
removed from the amplifier or the mains outlet.
• This device may not cause harmful interference, and
• This device must accept any interference received, including
interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct
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WARNING!
The Genelec 1238CF loudspeaker is capable of producing sound
pressure levels in excess of 85 dB, which may cause permanent
hearing damage.
System
The Genelec 1238CF DSP Loudspeaker is designed for precise
monitoring of 24 bit/192 kHz AES/EBU digital audio signal or
line level analog audio signal. The 1238CF is fully compatible
with Genelec Loudspeaker Manager GLM™ and the proprietary
Genelec loudspeaker control network and Genelec 7271A DSP
Active Subwoofer, but can also be used independently of these.
The 1238CF features high SPL output and low colouration in
Figure 1. Connectors and
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1
ON
OFF
ON
OFF
dB
-2
-4
-8
-6
-12
0
-10
SWITCH
1
MANUAL
CTRL
-4dB
160Hz
ON+ON
OFF+OFF
-6dB -6dB -2dB
STOREDDESKTOP
-2dB -4dB
BASS
ROLL-OFF
BASS
TILT
-2dB -4dB
+2dB -4dB
TREBLE
TILT
ON
OFF
SYSTEMLVL.AES/EBUCH.
AB
WF COAX
DRIVERMUTE
SWITCH
2
-10 -20
dB
-30
SUMA ANDB
MADE IN FINLAND
1238CF DSP TRI-AMPLIFIED
MONITORING SYSTEM
MAGNETICALLYSHIELDED
SERIALNUMBER
MAINS INPUT 230 V~
50/60Hz 330 W
DIGITALIN
AES/EBU
www.genelec.com
292-1238T-6
ANALOG
IN
DIGITAL THRU
AES/EBU
12 V
REMOTE
STAND-ALONE USER
INTERFACE LEVEL CONTROL
STAND-ALONE USER
INTERFACE SWITCH
GROUPS 1 AND 2
GLM CONTROL
NETWORK
CONNECTORS
MAINS POWER
SWITCH
MAINS INPUT
CONNECTOR
ANALOG INPUT CONNECTOR
DIGITAL THRU CONNECTOR
DIGITAL INPUT CONNECTOR
12V REMOTE
CONNECTOR
controls on the back panel
of the 1238CF.
a small enclosure size. It is suitable for a wide variety of tasks,
such as near field monitoring, mobile vans, broadcast and TV
control rooms, surround sound systems and home studios. The
advanced Directivity Control Waveguide™ (DCW™) technology
provide excellent frequency balance even in difficult acoustic
environments.
Amplifiers
The amplifier unit is mounted in the rear of the loudspeaker enclosure. The unit incorporates special circuitry for driver thermal
overload protection. Variable input sensitivity allows accurate
level matching to console output section.
Using the Loudspeakers in Stand-Alone
Mode
The 1238CF accepts both analogue line level input signals and
AES/EBU formatted digital input signals.
When the loudspeakers are not connected to a Genelec loudspeaker control network, they operate in stand-alone mode.
However, settings made with the Genelec Loudspeaker Manager
software can be saved into each loudspeaker and applied even
when the network is disconnected by setting switch 1 “STORED/
MANUAL CONTROL” on switch group 2 of each loudspeaker to
position “STORED.”
This manual concentrates on using the loudspeakers without the
control network. All issues concerning use with the network are
explained in detail in the System Operating Manual provided with
the GLM™ Loudspeaker Manager software kit.
Connections
Each loudspeaker is supplied with a mains cable, one 5 m GLM
network cable and an operating manual. Before connecting up,
ensure that the mains switch is off.
“MAINS INPUT” Connector
Connect the mains supply to this connector.
“DIGITAL IN AES/EBU” Connector
Use this female XLR connector for AES/EBU formatted digital
audio input signals. This input is selected automatically when a
valid digital audio signal is present, and overrides the analogue
input.
Depending on the digital hardware, transmission of a 192 kHz
sample rate is achieved using a double speed, single channel/
cable interface. This is called dual-wire mode. In this case one
cable per channel is used and no channel selection is required.
Dual-wire mode is automatically detected by the input stage.
If the digital source device has a digital level monitor pot or
graphical volume fader that controls the digital level, it may be
advantageous to lower the level control either on the GLM software interface or the loudspeaker’s back panel controls rather
than the source device, which in turn will force the use of more of
the digital [bit] resolution in the volume control.
If the digital input is used, audio levels are referenced to 0 dBFS
(digital Full Scale, the largest level that may be represented in
the AES/EBU signal). Genelec DSP loudspeakers produce 100
dB SPL at 1 meter in free space for a digital input signal of –30
dB FS. It is advantageous to keep the digital level as high as
possible.
“DIGITAL THRU AES/EBU” Connector
This male XLR carries an unaltered copy of the digital signal fed
into the “DIGITAL IN AES/EBU” connector. It can be used for
daisy-chaining up to four loudspeakers together.
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