Thank you for choosing Genelec! Fulfilling dreams by offering
people the most truthful sound reproduction possible has been
the source of our enthusiasm since 1978. There s already over
one million Genelec monitors around the world - welcome to
our story!
Genelec monitors are designed to last. They are hand-built
in Iisalmi, Finland, using certified sustainable methods. They
are individually tested and calibrated and have long support for
spare parts. They are designed for low power consumption, in
use and during automatic standby.
Please register your monitor at
http://www.community. genelec.com/.
By registering you receive an extended three-year warranty
for spare parts in addition of the standard two-year warranty for
parts and labour. For more information about our service and
technical support, please visit
http://www.genelec.com/customer-service.
System Characteristics
The Genelec W371A is an advanced low frequency loudspeaker
system with novel signal processing enabling variable acoustic
radiation of low-frequency audio.
The W371A is suitable for professional monitoring
applications calling for very high acoustic precision and
reliability. They combine with The Ones monitors, offering many
remarkable Genelec technologies to provide point source audio
benefits with directivity control over an extraordinarily wide
audio bandwidth.
The W371A offers steerable acoustic directivity at low
frequencies, enabling the user to select the low frequency
directivity characteristics optimal for the combination of his/her
listening room characteristics, and loudspeaker and listening
locations. The W371A is unique in that it enables a flat and
neutral frequency response at low frequencies in acoustically
challenging rooms when placed at locations typically resulting
in significant acoustic notching (cancellations) at certain
frequencies.
The W371A is not a simple traditional subwoofer. It is an
adaptive low frequency loudspeaker system, offering much
wider operating frequency range and much better envelopment
than subwoofers. Using the W371A can preserve stereo imaging
at the low frequencies.
The W371A is intended to be placed under or very near the
main monitor it is combined with. Frequently, W371A is used in
a free-standing position where the loudspeaker and the W371A
are placed at some distance from acoustically hard walls.
The W371A is comprised of two woofer units. The top woofer
unit is a closed box woofer system and the bottom unit is a bass
reflex ported woofer system. Each unit is driven by its dedicated
400 W amplifier and controlled by a digital signal processing
unit. For more details, see the functional block diagram in this
document.
The benefits of the W371A are fully realized after performing
an acoustic calibration with the monitor paired with it. This
calibration is provided using Genelec’s GLM software.
One W371A is used with one main monitor.
Using the Genelec GLM loudspeaker management software,
W371A output is matched with the monitor by taking acoustic
measurements at the listening location. After this, the W371A
becomes an integral extension of the monitor, expanding the
frequency range coverage and increasing the maximum SPL
and dynamic capacity of the monitor. W371A works with
Closed box
woofer system
Reflex box
woofer system
Figure 1. The W371A construction with a 8351B monitor
Genelec 8341A, 8351B and 8361A coaxial “The Ones” three-
way monitors, allowing ideal point-source monitoring also
at large listening distances, outside the traditional nearfield
monitoring range.
Packing Content
Each W371A is supplied with a GLM User Kit, one mains power
cable, one 5-meter GLM network cable and this operating
manual.
Operational Modes
The W371A can radiate low frequencies in several different
ways. The most suitable mode depends on application, room
and requirements for the size of the sweet spot.
The user can select and run the setup of W371A in all the
modes and audition to determine the preferred mode for his
situation.
To indicate the quality of the final alignment, GLM software
displays a flatness score and a correlation score after the
calibration. These scores can be used to gauge the best
choice for the operational mode given the system placement
in the room. However, subjective evaluation by listening to the
calibrated system is highly recommended in order to evaluate
the final setup choices.
The operating modes are:
Complementary mode where the two woofers operate
independently to implement a flat frequency response; this is
Figure 2. Connectors and controls on the back panel of the
W371A
Analogue in
Digital in
Link out
Link out
Figure 4. Functional block diagram of the W371A
Figure 3. Connector panel detail
GLM
Crossover Signal
processing
Phase
align
GLM
Crossover Signal
processing
Phase
align
Infrasound
protection
Infrasound
protection
Overload
protection
Overload
protection
Level
and
optional
gain
Level
and
optional
gain
Power
amplifier
Power
amplifier
Woofer
driver and
enclosure
Woofer
driver and
enclosure
Directive mode uses the two woofers simultaneously to
create continuous directivity matching with The One threeway coaxial monitoring loudspeaker; this mode enables the
system to maintain constant directivity down to very low bass
frequencies.
Null-steering modes use the two woofers simultaneously
to enable a directive mode where the direction of minimum
output (null) is set toward a problematic orientation in the
room – enabling this mode reduces back wall, side wall or floor
reflections.
Genelec Loudspeaker Manager™ (GLM™)
Software and GLM User Kit
The GLM software gets the most out of the W371A and tailorfits it to your room. Genelec recommends always using the GLM
software to set up a W371A.
GLM is available for download free of charge at www.
genelec.com/glm. Check in from time to time or consider using
the cloud-based version to take advantage of new features.
A GLM User Kit comprising the necessary hardware, including
the GLM Adapter and measuring microphone is needed for
setup as well as managing and operating the GLM network. The
GLM Kit is included with the W371A.
Smart Active Monitor (SAM™)
Genelec SAM technology can improve the reliability and accuracy
of monitoring. Smart Active Monitors have several parametric
notch and shelving filters that can be tuned automatically using
the Genelec Loudspeaker Manager (GLM) software to exactly
compensate for colorations generated by room acoustics. This
enables SAM monitors to sound neutral and achieve accurate
stereo imaging in all acoustical environments. The W371A
extends the SAM capability at low frequencies.
Audio Inputs
The audio inputs on the W371A integrate with all professional
environments, supporting balanced line-level analog audio and
AES/EBU digital audio. The maximum analog input level is +25
dBu (13.7 Vrms or 19.5 V peak). Set to the maximum sensitivity,
an analog input signal of -6 dBu produces a 100 dB SPL sound
level at one meter in free space. A -30 dBFS digital audio input
level produces a level of 100 dB SPL at one meter in free space.
Note that 0 dBFS refers to the largest possible digital input
value.
The ANALOG OUT male XLR connector carries an unaltered
copy of the analog input signal and is intended for connecting to
the paired main monitor when analog audio is used.
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Acoustic
axis
868 mm
34 3/16 in
Figure 5. Location and orientation of the acoustic axisFigure 6. Guidelines for placement of the W371A relative to the
monitors. Green area is recommended, yellow acceptable
The analog input is selected when the AES/EBU signal input
is not connected. The AES/EBU format digital audio input
is selected automatically when a valid digital audio signal is
present. Please note that this digital audio signal may be silent.
This automatic input selection can be overridden when the
W371A is controlled with the GLM network, enabling flexible
selection of either input.
The AES/EBU input supports two channels of audio in a
single cable. The DIGITAL OUT male XLR connector carries an
unaltered copy of the digital input signal and is intended to be
connected to the paired main monitor as well as to the next
W371A system.
Power Management
The W371A mains power input supports any mains voltage
globally (100-240 VAC, 50-60 Hz). It can be plugged in anywhere
in the world and will always deliver the maximum output power
to the drivers even when the mains voltage fluctuates. If mains
power is provided with a generator, inverter or lower-quality UPS
device, we recommend filtering out harmonics from the mains
power.
The energy saving function Intelligent Signal Sensing (ISS™)
puts the monitor automatically into a standby mode when no
input signal is present. The device then consumes less than
two Watts of power. Upon sensing an input signal, the monitor
automatically awakens. The standby time until entering the
power saving state can be configured using the GLM software.
When ISS is active, you can leave your monitors on at all times
and have the monitoring system immediately ready for action.
Placement of the W371A
The W371A enables free-standing placement. Ideally the
W371A is placed at the same location as the main monitor with
the main monitor on top of the W371A (see fig. 6). It is possible
to place the W371A behind or to the side of the main monitor.
4
Figure 7. Examples of routing cables using the provided
cable management clips. Do not run cables over the woofer
transducer.
Page 5
GLM Network
GLM Network
GLM Network
TERMINATOR
2920063
GLM
GLM Network
Figure 8. Cabling example for GLM management network; GLM network uses the provided 5-meter CAT cables
Analog InAnalog In
Analog Thru
Analog InAnalog InAnalog Thru
GLM Network
Figure 9. Cabling for analogue stereo audio
Digital InDigital In
Digital Thru
Figure 10. Cabling for AES/EBU digital audio
Digital Thru
Digital InDigital InDigital Thru
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Do not place the W371A very far from the monitor. Place the
W371A more than 10 cm (4 in) from the wall behind in order to
enable air flow for the amplifier and reflex port. Aim the acoustic
axis toward the listening position, similar to the monitor. As with
main monitor placement, left-right symmetrical placement in the
room is highly recommended.
Cabling the W371A and The One Monitor
The W371A offers cable management clips to ensure that cables
are kept away from the drivers and electronics in order to avoid
rattling noises. M4x10 mm screws are provided. Use a size 20
Torx screwdriver. The correct tightening torque is 2 Nm. Do not
overtighten the screws.
ColourIndication
Solid greenNormal state, normal operation
Blinking greenGLM is interrogating the monitor
Blinking green every 10 sec. Monitor is in an ISS power saving sleep
state
Blinking redPower amplier overload protection is
active (audio is modied because of
protection)
Solid redMonitor is muted
Solid yellowMonitor is not in the active (playing)
group
Blinking yellowOverheat protection is active (audio is
modied because of protection)
Setup Using The GLM™ Control Network
A system of W371A and SAM series active monitors can only be
configured and calibrated using GLM software, running on PC
or MAC. You can find a detailed description of the setup and the
use in the GLM System Operating Manual.
The GLM software and the proprietary Genelec monitor
control network offer automated acoustic equalization and
alignment for any reproduction system from mono and stereo to
very complex 3D immersive audio setups, including also one or
more subwoofers. GLM includes AutoCal, an expert algorithm
for automatically measuring and calibrating monitoring systems,
built using data collected from thousands of professional
listening rooms.
Setup with the GLM User Kit consists of the following steps:
• Connect a CAT5 (RJ45) cable between each monitor and
adaptive woofer system and finally to the control network
input of the GLM Adapter device (see Figure 8).
• Connect the GLM Adapter device to a computer USB
connector.
• Using a microphone stand, place the Genelec
measurement microphone at the listening location with the
microphone pointing upwards and the microphone top at
the height of the engineer’s ear. The microphone is a part of
the GLM User Kit.
• Connect the microphone cable to the microphone input
in the GLM Adapter device.
• Download the GLM software from the Genelec web site
(www.genelec.com). Install the GLM software and follow
the instructions in the software to measure and set up your
monitors.
• If you do not plan to use a computer for daily control of
the monitors, use the GLM software to write the settings
into the monitors (use Menu tab Group > “Store Group
Settings…”).
The GLM network may be used for monitor control during
daily use, such as switching between sets of loudspeakers,
soloing and muting audio channels, invoking calibrated playback
levels and so on. In that case, the computer remains connected
to the GLM network with the GLM software running.
The settings can also be permanently stored inside all
monitors when the calibration and the setup is intended to remain
fixed. Then, the computer is only needed during the setup.
The CONTROL NETWORK RJ-45 connectors and standard
CAT cables are used for the GLM network. The GLM control
network is not Ethernet LAN compatible. Do not connect to an
Ethernet LAN.
Table 1. Monitor front panel light indications summary
Tips for Calibration and Use
A system combines the W371A and a monitor that typically sits
on top of W371A.
The acoustic calibration is divided into two parts. First,
monitors are measured and calibrated. Once you Confirm the
monitor calibration these values are stored into monitors and
become the references for the W371A calibration procedure.
Select the W371A calibration and follow instructions to pair and
calibrate W371A woofers.
To understand the full benefit of W371A woofers, you may
want to create an additional Group to play the monitors alone,
without W371A woofers. To do this, Duplicate your Group, and
in the Group define page, title this duplicate Group suitably, for
example “Monitors Only”. Remove the W371A woofers from this
Group by double-clicking each W371A icon so it turns yellow.
Confirm Group and then follow instructions to calibrate.
To save all calibrations, once calibrations are done, Confirm
Calibration and Save Setup.
Building Monitoring Systems
Manual editing of the automatically generated acoustic
calibrations is not required but instructions for manual editing
are presented here to demonstrate the flexibility of GLM. In order
to manually edit the acoustic settings, you may want to take a
copy of the automatic settings and then edit the copy. In the
Group tab, the menu item Duplicate Group copies the current
setup including all the calibration settings. To adjust settings in
individual monitors, double-click on a monitor icon on the main
GLM page to enter the Acoustic Editor.
Confirm each Acoustic Editor window at the bottom right of
each page when you are done. This returns you to the main
GLM page.
After having manually edited the acoustic setting in the
monitors, you will need to recalibrate the W371A woofers in the
current Group.
From the Group tab select Edit Group. At this stage, you can
edit the Group name to indicate your changes. Then, ensure
the W371A woofers are included in the Group. Add the W371A
woofers into the Group by double-clicking on yellow W371A
icons making them green. After doing this Confirm Group.
This brings you to the AutoCal page for monitor loudspeaker
calibration. Because you manually edited the acoustics, you
do not want to re-calibrate. Press Skip AutoCal. This will carry
forward the edited monitor loudspeaker calibration values to the
W371A calibration.
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Then, follow the instructions on the Woofer Cal page to pair
W371A with a monitor, choose the W371A Mode you wish to
use, select the crossover frequency range (or use the default)
and finally double-click the microphone icon. This launches the
calibration process for W371A. Frequency sweeps are audible
on the W371A, one woofer at a time, followed by the main
monitor sweep. After this, the calculation process starts. The
progress of the calculation is shown on the GLM page.
This section is only needed when you wish to manually edit
the monitor loudspeaker acoustic calibrations before calibrating
the W371A woofers to work with the loudspeakers. Normally,
this process is not necessary.
Front Panel Light
Normally, the light on the front panel is green, indicating normal
operational mode. Red and yellow colours are used to indicate
special situations. See Table 1.
Maintenance
There are no user serviceable parts inside the monitor.
Maintenance or repair must only be done by Genelec certified
service personnel. The monitor enclosure must not be opened.
Opening the monitor may lead to loss of the individual monitor
factory calibration and damage to components.
Evaluating Modes
To evaluate different W371A directive mode options, go to the
Group tab and select Duplicate Group. Then, in the duplicated
Group, double-click the microphone icon to re-run AutoCal.
Press Skip AutoCal. After this, on the Woofer Cal page, doubleclick on the microphone icon to re-run the W371A calibration
selecting your desired directivity options.
For example, you may wish to have four Groups for testing:
monitor alone, monitor + W371A in the Complementary Mode,
monitor + W371A in the Directive Mode, monitor + W371A in
one of the Null Steering Modes. When auditioning, notice that
it can take a relatively long time (up to a week) before all the
qualities of each mode may be fully appreciated.
Frequency Response Trim
The calibration procedure provides state-of-the-art flat frequency
response suited for critical reference listening. Depending
on the application and your previous listening experience, a
slightly downwards tilted system frequency response may be
considered relevant by certain users. The frequency response
of each monitor Group may easily be tilted using the Sound
Character Profiler found under the Group menuin GLM. When
the monitoring loudspeakers are used without having a computer
connected, select the Store settings after trimming to make the
trimming permanent. Re-storing the setup file in a computer
saves your trimming for the situation where a computer running
GLM is used in daily work.
Selecting Crossover Regions
W371A calibration enables selecting the crossover frequency
ranges. Your selections of the ranges are affected by room
acoustics, W371A and listening locations. You may want to
avoid notches in the monitor response. The default crossover
range is 150-250 Hz. You can select a higher range up to 300
Hz and no narrower than 50 Hz wide. The measurement curves
and subjective evaluations may guide your preferences as well
as your choice of the W371A operating mode. When the W371A
is positioned behind a large console obscuring the upper front
woofer, a low crossover range below 250 Hz is advisable.
Safety Considerations
Although the W371A has been designed in accordance with
international safety standards, to ensure safe operation and
to maintain the monitor under safe operating conditions, the
following warnings and precautions must be observed:
• Servicing and adjustment must only be performed by
certified Genelec service personnel. The monitor 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 monitor 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 monitor loudspeaker or the mains outlet.
• Free flow of air behind and around the monitor is
necessary to maintain sufficient cooling. Do not obstruct
airflow around the monitor.
WARNING!
The W371A is capable of producing sound pressure levels in
excess of 85 dB, which may cause hearing damage. Sound
exposure level integrated over an 8 hour working day should
be limited to 80 dB(A) to reduce the risk of permanent hearing
damage. For each 3 dB increase in the sound exposure the
acoustic energy is doubled, and the exposure time should be
halved to maintain the same risk level.
Guarantee
The Genelec W371A is guaranteed for two years against
manufacturing faults or defects altering performance. In
addition to this, you can get additional three years of guarantee
that covers spare part costs by registering your product at www.
genelec.com. Refer to the reseller for full sales and guarantee
terms.
Operating Environment
This product is designed for indoor use only. The permissible
ambient temperature is 15-35 degrees Celsius (50-95°F) and
relative humidity 20% to 80% (non-condensing). To prevent
condensation of humidity, after the product has been stored
or transported in a cool environment and is then taken into a
warm room, wait 0.5-1 hours before opening the packaging and
connecting to the mains power.
Sufficient cooling around the W371A must be ensured. The
minimum clearance behind and on both sides of the monitor is 10
cm (4 in). The product is not designed to be installed in a recess.
Compliance to FCC Rules
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
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to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
try to 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.
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.
Specifications
SYSTEM SPECIFICATIONSW371A
Lower cut-off frequency -6 dB (anechoic, continued directivity mode)23 Hz*
Upper cut-off frequency -6 dB (anechoic, continued directivity mode)500 Hz**
Accuracy of frequency response (anechoic, continued directivity mode)± 3 dB (25 Hz - 450 Hz)
DriversFront 356 mm (14 in), Rear 305 mm (12 in)
Harmonic distortion at 1 m on axis in half space, 30 to 100 Hz2nd ≤ 3% @ 100 dB SPL
Harmonic distortion at 1 m on axis in half space, >100 Hz< 0.5% @ 95 dB SPL
Maximum short term sine wave SPL output averaged 30 Hz to 100 Hz, measured in half space at 1 meter≥117 dB SPL
Maximum short term sine wave SPL output averaged 100 Hz to 500 Hz, measured in half space at 1 meter120 dB SPL
Maximum peak SPL output with pink noise, measured in half space at 1 meter. (Long term output is limited
by driver unit protection circuitry)
Self generated noise level in free space at 1 m on axis (A-weighted)≤15 dBA
Weight61 kg (134 lb)
Dimensions
Height without feet
Height with feet
Width
Depth
* In-room LF roll-off -6 dB target is 19 Hz
** HF roll-off is determined by operating mode and in-room responses. Values from 150 Hz to 300 Hz are possible
3rd ≤ 2% @ 100 dB SPL
≥123 dB SPL
1100 mm (43 5/16 in)
1108 mm (43 5/8 in)
400 mm (15 3/4 in)
400 mm (15 3/4 in)
Analogue input sensitivity (100 dB SPL at 1 m)-6 dBu
Adjustment range+48 dBu to -6 dBu
Digital signal input connector XLR female 110 OhmAES/EBU Single wire
Digital signal output / Thru connector XLR male 110 OhmAES/EBU Single wire
Digital audio input
Word length
Sample rate
Digital input sensitivity (100 dB SPL at 1 m)
Digital input maximum attenuation
Positive input gain selection (via GLM)
Control network
Type
Connection and cable
System calibration
Input/output connections1 x analog XLR input / 1 x analog thru, 1 x
pin 3 inverting
16 - 24 bits
32 - 192 kHz
-30 dBFS
48 dB
(+6, +12, +18 dB)
Proprietary GLM network
2 RJ45, standard CAT5 cable or later
AutoCal
XLR digital AES/EBU input / 1 x digital thru
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0°
60°
15°
30°
45°
70
75
80
85
90
95
dB SPL
10
AMPLIFIER SECTIONW371A
Short-term amplifier output power (Long-term output power is limited by driver unit protection circuitry)400 + 400 W
Amplifier system THD at nominal output<0.01 %
Mains voltage100-240 VAC 50/60 Hz
Power consumption
Standby, ISS active
Idle
Full output, peak
<2 W
40 W
600 W
100
200
20
50
500
1k2k
5k
10k
Frequency Hz
20k
Figure 11. Frequency response of W371A on the acoustical axis
and at 15, 30, 45 and 60 degree off-axis angles on the horizontal
plane - Continued Directivity Mode
Figure 12. Horizontal directivity of W371A. Continued Directivity
Mode
Figure 13. Horizontal directivity of W371A. Null Steering Mode reduction back wall
Figure 14. Horizontal directivity of W371A. Null Steering Mode reduction side wall