Genelec 9301B User manual

Genelec 9301B
Multichannel AES/EBU Interface
Operating Manual
9301B

Genelec 9301B Multichannel AES/EBU Interface
Introduction
Congratulations and thank you for
purchasing the Genelec 9301B multichannel
AES/EBU interface.
This manual addresses the setting up
and use of the Genelec 9301B multichannel
AES/EBU interface intended for 7300 series
subwoofers.
The 7300 series smart active monitoring
(SAM) subwoofers have one AES/EBU
input. The 9301B expands the digital audio
connectivity to 16 audio channels, for
example for 9.1.6 channels, when the low
frequency eects (LFE) channel is also used.
The energy-saving Intelligent Signal
Sensing (ISS) function puts the 9301B
automatically into a power-save state when
no input signal is present. The waiting time
until entering the ISS power save can be
congured using the GLM software. In the
power-save state the 9301B consumes less
than one watt of power. Upon sensing an
AES/EBU input signal the 9301B wakes up
to normal operating mode.
Each 9301B is supplied with
• a mains cable,
• one 5 m GLM network cable
• and an operating manual.
Installation
Before connecting up signal cables, we
recommend the mains power is switched o
in all devices.
Connections
The mains input supports a wide voltage
range (100-240 VAC, 50-60 Hz). If the
mains power is provided with a generator,
inverter or a low-quality UPS device, we
recommend filtering of the mains power
voltage harmonics.
The digital audio input connections
for AES/EBU digital audio use two DB25
connectors. If LFE signal is in use, the
channel and subframe carrying the LFE
channel is assigned in the GLM software
(See Figure 1 overleaf).
The digital audio output for the
monitors uses one DB25. This outputs
16 channels of AES/EBU format audio.
The output signals are bit-to-bit copies of
the input digital audio signals. Because of
this, the outputs retain the original signal
quality without any modication. When it is
used, the LFE signal is output in the same
channel and subframe in the digital output
DB25 connector. This means that the LFE
channel content is also available for devices
connected to this output.
The digital audio output for the
subwoofer uses one male XLR. This is
connected to using an AES/EBU cable and
carries in one AES/EBU subframe the sum
of all the main channel inputs and the LFE
channel (if used) in the second AES/EBU
subframe. Genelec Loudspeaker Manager
(GLM) software manages the 9301B to work
with 7300 series subwoofers.
The AES/EBU output on the 7300 series
subwoofers enables daisy-chaining onwards
to more SAM subwoofers to increase the low
frequency acoustic output capacity. When
more than one subwoofer is used this way,
GLM software manages aligning this complete
system of subwoofers with the monitors.
Two GLM Network connectors are
available for management using the Genelec
Loudspeaker Manager (GLM) software.
Functionality
All settings to 9301B are done using the GLM
management network and GLM software.
9301B provides bit-to-bit copy of the
input AES audio signals to AES outputs, and
therefore the output has the same sample
rate and format as the input audio data. Each
AES input carries two channels of audio.
The subwoofer link out is a scaled sum
of all the input audio channels and the
LFE channel. Before summing all the input
channels are sample rate converted to the
same sample rate at the summation point.
The LFE channel is assigned by GLM
software and handled separately.
Input cabling
The input cabling for the digital audio from the
audio source, such as a DAW, is done using
two standard DB25 to DB25 Tascam-format
digital audio pin-out cables, for example Avid
DB25 - XLR M+F AES/EBU 4. Using this
method allows the AES inputs to the DAW on

Figure 1. The principle of connecting the 9301B.
Figure 2. Functional block diagram of the 9301B
GLM ADAPTER
= AES/EBU DIGITA L CABLING
= GLM NETWORK CABLING
AUDIO SOURCE
MAINS INPUT
AES IN 14 AES IN 58 AES OUT 18
SUBWOOFER
LINK
AES OUT
DIGITAL
OUT
DIGITAL
IN
DIGITAL
IN
GLM
NETWORK
the DB25 connectors to be used .
Tascam-format DB25 is carrying four input
and four output cables of AES/EBU. In some
cases, the DAW needs to input digital audio
on the same DB25. In this case, two fan-out
cables with XLR connectors on one end and
a DB25 on the other enable also the inputs
to the DAW to be connected.
Output cabling
The audio output to monitors uses a DB25 to
8 x XLR male fan-out cable with the Tascam
analogue pin-out, for example an Avid
DB25-XLRM Digisnake 4. AES/EBU XLR-to-
XLR cables are needed to extend the signal
onwards to the the monitors.
Connector pin-outs
The input connector pin-out of the two DB25
audio input connectors follow the standard
Tascam digital audio pin-out shown in Figure
3.
Figure 3. Digital audio input cable
pin-out.
Figure 4. Digital audio output cable
pin-out.

The output connector pin-out of the one
DB25 is shown in Figure 4. This pin-out
is compatible with the Tascam analogue
output pin-out. However, we recommend
high quality AES/EBU digital audio cable to
be used for the output.
Controls And Adjustments
The 9301B front panel features the mains
power switch with power on light and active
connection indicator lights for all AES/EBU
inputs, each carrying two channels of audio.
The 9301B is completely set up using the
GLM software. See section ‘Use With GLM
Management Network’ for details.
When the power switch light is ashing
continuously, the 9301B settings are being
edited with the GLM software. When the
input cable lights are lit a valid AES/EBU
input has been detected. If the input cable
light is o, there is a problem with the AES/
EBU data or there is no valid AES/EBU input.
See Table 1 for a list of light functions.
Use With GLM™
Management Network
The 9301B is set up using the Genelec
Loudspeaker Manager GLM™ software using
the Genelec monitor management network.
More information about the GLM™ is available
in the SAM System Operating Manual.
System Configuration
The setup is easy and consists of the
following steps:
• Connect the digital audio inputs.
• Connect the digital audio output fan-
out cable with XLR-to-XLR cables to
each monitor. Use cables intended
for carrying AES/EBU digital audio.
Genelec discourages the use of standard
analogue microphone cables as this may
reduce system performance.
• Connect the SUBWOOFER LINK
output to the DIGITAL IN connector in a
subwoofer.
• Connect CAT5 (RJ45) cables between
the 9301B, every monitor and subwoofer.
Finally connect to the GLM Adapter
device (see Figure 1). The order of
connecting devices is not signicant.
Connect the GLM Adapter device to
computer USB connector.
• Install and run GLM software.
monitor Group is set to AES/EBU Digital,
activate 9301B devices in that group. At
the same time, ‘Digital Input Used With’
in all 7300 subwoofers turn to ‘9301B’
multichannel mode.
• Select the active AES/EBU cables.
• If you use the LFE signal, select the AES
cable and subframe carrying the LFE.
• Select the ‘+10 dB’ setting when the LFE
signal must be boosted in the subwoofer
by 10 dB relative to the main audio
channels.
If all 9301B devices are set to ‘Group O’
state, then the ‘Digital Input Used With’ in all
7300 series subwoofers switches to ‘Stereo’
mode to play normal AES/EBU digital stereo
digital audio input.
Table 1. Front panel indicator light functions
All your devices appear in the monitor
stack in the GLM software. When you keep
devices in the GLM monitor stack to the
honeycomb grid, you will eventually nd the
9301B in the product stack, drag and drop
it to an area on the Layout grid adjacent to
where the subwoofer will be placed (see
Figure 5).
In case you have multiple 9301B units,
observe that when you click with the mouse
on a 9301B icon, the front panel light on the
selected 9301B starts ashing. This can help
in identication.
In GLM software settings of the 9301B:
• Set the ‘Input Signal Type’ of the monitor
Group. If the ‘Input Signal Type’ of the
Indicator Colour, indication Meaning
Power switch Solid green Power on, normal operation
Blinking green GLM is adjusting 9301B
Green blink every 10 s 9301B in power save mode
No light No power, power o
Input signal indicator Solid green Valid digital audio is detected and
received
No light Valid input is not detected
Figure 5. 9301B setup panel in GLM software.

Guarantee
Genelec guarantees the 9301B for ve years
against manufacturing faults or defects
altering performance. Refer to the reseller
for full sales and guarantee terms.
Safety Considerations
The 9301B has been designed in accordance
with international safety standards. To ensure
safe operation, the following warnings and
precautions must be observed:
• Servicing and adjustment must only be
performed by Genelec certied service
personnel.
• The enclosure must not be opened.
• Do not use this product with a mains
cable or mains outlet having no protective
earth (potential equalizing) connection as
doing so may result in personal injury.
• To prevent re or electric shock, do not
expose the unit to water or moisture.
• Do not place objects lled with liquid,
such as vases, on the 9301B or near it.
• The 9301B is not completely
disconnected from the mains power
unless the mains cable is removed from
the device or the mains outlet.
Compliance to FCC Rules
This device complies with part 15 of the FCC
Rules. Operation is subject to the following
two conditions:
• 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.
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 o
and on, the user is encouraged to try and
correct the interference by one or more of
the following measures:
• Reorient or relocate the receiving
antenna.
• Increase the separation between the
equipment and receiver.
• Connect the equipment into an outlet on
a circuit dierent from that to which the
receiver is connected.
• Consult the dealer or an experienced
radio/TV technician for help.
• Modications not expressly approved
by the manufacturer can void the user’s
authority to operate the equipment under
FCC rules.
Indicator Colour, indication Meaning
Power switch Solid green Power on, normal operation
Blinking green GLM is adjusting 9301B
Green blink every 10 s 9301B in power save mode
No light No power, power o
Input signal indicator Solid green Valid digital audio is detected and
received
No light Valid input is not detected
Acoustic Calibration
To acoustically calibrate your setup, place
the Genelec measurement microphone on a
microphone stand and put the microphone
at the listening location pointing upwards
with the microphone top at the listener’s ear
height. Then, follow instructions in the GLM
software to calibrate your monitors and
subwoofers.
Genelec recommends using the GLM
software and having the GLM network
connected.
When you do not wish to have the
computer connected after calibration,
you have the option to save the acoustic
calibration into monitors, subwoofers, and
9301B units. This enables the calibration
with the GLM network disconnected. The
settings can be stored into the 9301B using
GLM software menu item ‘Store | Store the
Current Group Settings...’. Note that the
monitors and subwoofers have a switch
selecting the use of the stored settings,
and this switch must be set ON to operate
the system without computer and GLM
network. Removing the GLM network cable
and powering down and up the 9301B and
monitors enables the stored settings.
Returning to factory settings
The room settings stored in a 9301B can
be erased by keeping the power switch
depressed for more than 10 seconds. This
returns the 9301B to factory settings. After
this, GLM software should be used to
recongure the system.
Operating Environment
The 9301B is designed for indoor use only.
The permissible ambient temperature is
15-35 degrees Celsius (50-95°F) and relative
humidity 20% to 80% (noncondensing).
When the product has been stored or
transported in cool environment and is taken
into a warm room, wait 30-60 minutes before
opening packing to prevent condensation.
Sufficient cooling must be ensured. No
minimum clearance is needed.
Maintenance
There are no user serviceable parts inside
the 9301B. Maintenance or repair must
only be done by Genelec-certied service
personnel.

SPECIFICATIONS
Weight 2 kg (4.4 lbs)
Dimensions:
Height
Width
Depth
44 mm (1 11/16 in)
466 mm (18 3/8 in)
211 mm (8 5/16 in)
Mains voltage 100...240 VAC (50...60 Hz)
Mains tolerance +/- 10 %
Power consumption
ISS power saving mode
Idle
Full operation
1 W
1 W
2 W
Digital audio input connectors 4 XLR female
Digital audio input impedance 110 Ohm
Digital audio output connectors 5 XLR male
Digital audio format AES/EBU (AES3-2003)
Can also be used with S/P-DIF and AES3id
signals when impedance converters are
used
Digital audio word length Minimum 16 bits, maximum 24 bits.
Fixed point, AES/EBU format
Digital audio sample rate Minimum 32 kHz, maximum 192 kHz.
Supports single-wire AES/EBU audio,
does not support dual wire AES/EBU audio

Genelec 9301B Multichannel AES/EBU Interface
Genelec Document D0206R001. Copyright Genelec Oy 10.2022. All data subject to change without prior notice www.genelec.com
International enquiries:
Genelec, Olvitie 5
FIN-74100, Iisalmi, Finland
Phone [phone]
Fax [phone]
Email [email protected]
In the U.S. please contact:
Genelec, Inc., 7 Tech Circle
Natick, MA 01760, USA
Phone [phone]
Fax [phone]
Email [email protected]
In China please contact:
Beijing Genelec Audio Co.Ltd
Room 101, Building B33,
Universal Business Park,
No.10 Jiuxianqiao Road,
Chaoyang District,
100015 Beijing, China
Phone [phone]
[phone]
Email [email protected]
In Sweden please contact
Genelec Sverige
Tureholmsvägen 12
125 35 Älvsjö
Sweden
Phone [phone]
Email [email protected]
In Japan, please contact:
Genelec Japan Inc.
2-22-21 Akasaka, Minato-ku
07-0052, Tokyo
Phone [phone]
[email protected]
Email [email protected]