Genelec 7380A Service Manual

7300 Series

Operating Manual
Genelec 7380A

Smart Active Subwoofer

Genelec 7380A Smart Active Subwoofer

Introduction

Thank you for choosing a Genelec product!

Fullling our customers' dreams by oering

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!

All Genelec monitors are designed, hand
assembled and individually tested at our
factory in Iisalmi, Finland. Our products are
designed to last for decades and we take
care that our customers receive excellent
support and technical services throughout
the lifetime of the products.

Please register your monitor at http://
www.community.genelec.com/. You will
receive an extended 5 year warranty for
spare parts. More information about our
service and technical support: http://www.
genelec.com/customer-service.

System Description

The Genelec 7380A SAM subwoofer
integrates easily into environments based on
analog or digital interfacing. The 7380A even
introduces outstanding GLM™ features to the
lower octaves of monitoring systems based

on main speakers from a dierent vendor.

The 7380A is designed for precise monitoring
of multichannel analog audio signals and
stereo AES/EBU signals. Multichannel AES/
EBU signals can be monitored by using the
9301A multichannel digital audio interface
device connected to the subwoofer.

The subwoofer can be fully set up
using the controls built into the unit. The
7380A can also be precisely calibrated to
the monitoring room acoustics using the
Genelec Loudspeaker Manager (GLM)
computer software. The GLM software
runs on Mac OS and Windows computers
and enables detailed acoustic calibration
permanently inside the subwoofer. It is
also possible to use the GLM software as
a monitoring management system for more
than 30 SAM monitors and subwoofers.

In its power save mode, the 7380A
consumes less than 2 W of power. Energy
saving Intelligent Signal Sensing (ISS) can
automatically put the subwoofer into a
power save mode when audio has been
absent for a selected time. Upon sensing an
input signal, the subwoofer wakes up to full
operation. The time before entering the ISS

power save mode can be congured using

the GLM software. When the ISS is active
you can have your monitoring system ready
for action at all times.

Package content

Each subwoofer is supplied with a mains
cable, one 5 m GLM network cable and an
operating manual.

Genelec Loudspeaker

Manager™ (GLM™) Software

And GLM User Kit

The GLM software gets the most out of

7380A and tailor-ts it to your room. GLM

is available for download free of charge at
www.genelec.com/glm. Check in from time
to time to take advantage of new features,
or consider using the cloud-based version.

A GLM User Kit comprising the necessary
hardware, including the GLM Adapter and
measuring microphone is needed for building
and operating the GLM network. This kit can

be purchased at certied Genelec dealers.

Connections

Before connecting signal cables, switch the

subwoofer and monitors o.

Analog inputs 1 to 7

The 7380A SAM subwoofer accepts
balanced XLR inputs. These are the outputs
typically provided in a console or a monitor
controller. The maximum balanced audio
signal level is +24 dBu.

LFE In

A dedicated XLR input is provided for the
analog LFE signal. The bandwidth for a signal
fed to the LFE input is 120 Hz. The LFE input
sensitivity can be set the same as for the
main channels or at +10 dB relative to the
main channels. This feature is set using the
+10 dB DIP Switch or in the GLM software.

AES/EBU input

One AES/EBU digital audio XLR input is
available on the 7380A subwoofer. This can
take a stereo digital audio signal.

Multichannel digital audio monitoring is
possible with the 9301A interface device.
The 9301A connects to the digital audio input
in the 7380A subwoofer and expands the
number of digital audio inputs to four XLR
digital audio inputs. This supports a 7.1 audio
system, including an LFE channel.

Analog Output 1 to 7

Analog balanced XLR connectors connect
the subwoofer to monitors.

The 7380A SAM subwoofer supports two
bass management methods. Depending on
the chosen bass management method, these

analog outputs carry either unltered copy of

the inputs (SAM distributed crossover) or a

high-pass ltered signal (xed crossover).

The xed crossover is set to 85 Hz. The

SAM distributed crossover method allows
the subwoofer crossover to be adjusted in
the GLM software from 50 Hz to 100 Hz.

See chapter "Bass Management" for
details.

LFE Out

The analog LFE Out is a copy of the signal
at the analog LFE In. Typically, the LFE Out
is used in connecting to the LFE In of the
next subwoofer when multiple subwoofers
are used together.

Link Out

The sum of the analog inputs 1 to 7 is
available at the analog Link Out. The Link Out
is used in connecting to the next subwoofer
when subwoofers are used together while
using analog signals. See chapter "Using
Multiple Subwoofers."

Link In

The analog Link In accepts the signal from
the analog Link Out. The Link In input is used
when multiple subwoofers are used together
while using analog signals. When the Link In
is connected, the analog inputs 1 to 7 should
not be connected.

See chapter "Using Multiple Subwoofers."

OUT1 / Test 1

The analog OUT1 / Test 1 output XLR passes
a test tone for aligning the phase of the
subwoofer with a monitor.

This test tone has a frequency of 85 Hz
when the 7380A SAM subwoofer is set up
using the controls built into the subwoofer.
The test tone is enabled with the DIP Switch
labeled Test Tone. For more details on the
use of this output, see the section ‘Manual
Phase Alignment Method’.

OUT2 / Test 2

This analog output XLR is reserved for future
use.

IN/OUT

SWITCH

BYPASS
SWITCH

CONNECTOR

MAINS

INPUT

CONTROL

SWITCHES

ROTARY

LEVEL

ADJUSTMENT

Figure 1. Connector panel of the 7380A.

AES/EBU Out

The AES/EBU Out is a bit-to-bit copy of
the digital audio signal on the AES/EBU IN.
This output can be used for digital sharing
of the audio between subwoofers in the
case where multiple subwoofers are used.
This output can also be used for distributing
a stereo digital audio signal to monitors.
This can create a 2.1 digital audio stereo
monitoring system.

Bypass

The Bypass input accepts a 6.3 mm tip-ring­sleeve (TRS) or tip-sleeve (TS) plug. This
plug supports a contact open/close switch
device. Connecting the TIP to the SLEEVE
activates the bass management bypass.
When the bass management bypass is
active, the subwoofer only reproduces the
LFE signal and the outputs bypassed to the
monitors are exact copies of the inputs.

The Bypass switch is intended to be used
when the subwoofer is set up using the
controls built in the subwoofer.

The GLM software control enables also

bypassing the bass management and oers

a wider set of controls and adjustments.
When the GLM is used, the TRS bypass
control is not needed.

7380ASMARTACTIVE SUBWOOFER

THISDEVICE COMPLIES

MAINSINPUT

WITHFCCPART15AND
CANADIANICES-003RADIO

50/60Hz600W

FREQUENCYCLASSBEMISSION

100- 240V~

REQUIREMENTS.REFERTO
OPERATINGMANUALFORFULL
INFORMATION.

WARNING

ELECTRICSHOCK HAZARD.DONOTOPEN.DONOT
SUBJECTTO WATERORMOISTURE. NOUSER
SERVICEABLEPARTSINSIDE.REFERSERVICINGTO
QUALIFIEDPERSONNEL.USE EARTHEDMAINS
CONNECTIONONLY.

AVERTISSEMENT

RISQUEDE CHOCÉLECTRIQUE.NEPASOUVRIR. NEPAS
EXPOSERÀL'EAUOUL'HUMIDITÉ. AUCUNCOMPOSANTÀ
L'INTÉRIEURREMPLAÇABLEPARL'UTILISATEUR.ADRESSER
TOUTERÉPARATIONÀUNPERSONNELQUALIFIÉ.
CETAPPAREILDOITÊTRERACCORDÉÀLATERRE.

LAITEONLIITETTÄVÄSUOJAKOSKETTIMILLA
VARUSTETTUUNPISTORASIAAN.
APPARATETMÅTILKOPLES JORDETSTIKKONTAKT.
APPARATENSKALLANSLUTAS TILLJORDATUTTAG.

BASSROLL-OFF

PHASE
DIGITALLFE
LFECHANNEL
LFE+10 dB

LEVEL
TESTTONE
ISS
STORED

INPUTdBu
PRODUCING
100dB SPL(1 m)

RESETTO
FACTORY
SETTINGS:
PUSHBUTTON
FOR10SEC

MADEIN FINLANDwww.genelec.com

BYPASS

ANALOGANALOGANALOG

-4dB

-8dB

-90°

-180°

ON/OFF

A/B

-10dB

-20dB

ONOFF

-2

-4

-6

0

+2

+12

+4

+8

IN 6

IN 3

IN 1IN2

IN 7

OUT 6OUT 7

IN 4

OUT 3OUT 4

OUT1
TEST 1

TEST 2

OUT2

LFEIN

OUT

IN 5

LFE OUT

OUT 5

IN

DIGITAL

POWER

COMPUTER
RUNNING
GLMSOFTWARE

GLM ADAPTER

USB CABLE

SUBWOOFER

MONITORS

Figure 2. GLM Network cabling. Audio cabling not shown.

LINKIN

LINK OUT

GLM NETWORK

GLM

TERMINATOR

SERIAL

NUMBER

MICROPHONE

PLACED IN

THE LISTENING

POSITION

292-0063

GLM NETWORK
CABLE

ANALOG IN/OUT
CONNECTORS

AES/EBU
CONNECTORS

GLM NETWORK
CONNECTORS

GLM Management Network

All controls and calibration features included
in the 7380A SAM subwoofer can be set using
the Genelec Loudspeaker Manager (GLM)
software. Two GLM Network connectors are
provided on the subwoofer for computer
control. These connectors accept CAT5 or
higher cable (RJ45 connector). Standard CAT
cables can be used.

The GLM management network runs a
proprietary protocol. This is not an Ethernet
connection, do not connect to an Ethernet
network.

Mains Power Input

The main power connection supports a
wide mains voltage range (100-240 VAC,
50-60 Hz). This enables the 7380A SAM
subwoofer to be plugged in anywhere
globally. When the mains power is provided
with a generator, inverter, or certain lower-

quality UPS devices, we recommend ltering

power to remove harmonics and ensuring
the voltage supply is stable.

Bass Management

Bass management divides the input audio
signal into low frequency and high frequency
content at the subwoofer crossover frequency.
The signal content below the crossover
frequency is reproduced by the subwoofer.
The signal content above the crossover
frequency is reproduced by the monitors.

The 7380A supports two bass
management methods: the centralized bass
management method and the distributed
bass management method.

Centralized bass management

The centralized bass management method
uses fixed 85 Hz crossover filters in the
analog output channels in the 7380A SAM
subwoofer for the signal feeds going to

monitors. All analog signal cables are rst

routed to the subwoofer's IN connectors

and then from the OUT connectors to the
respective main monitors. The outgoing
signal has the low frequencies removed.

The fixed highpass filters inside the
subwoofer can be used when using the in-built
controls or with GLM software-based control.
However, we recommend the much more

exible distributed bass management method.

Distributed bass management

In the distributed bass management method
the monitors and the subwoofer receive

full banwidth audio signal and the ltering

is done separately inside each monitor
and subwoofer. The lowpass and highpass
filters are set in synchrony by the GLM
management network. This method is only
available in systems where GLM computer
management is used and with monitors
supporting this method. The subwoofer
crossover frequency can be adjusted from
50 Hz to 100 Hz.

The distributed bass management
supports three different signal cabling

congurations:

• All channels are routed through the

subwoofer's IN/OUT connectors to the

respective monitors.

• Y-cables split each signal to the

subwoofer's IN connector and the

monitor's input.

• Signal sources with dual outputs for each

channel, one going to the subwoofer, the

other going to the monitor.

Use With GLM Control

Network

The 7380A SAM subwoofer is fully
compatible with Genelec Loudspeaker
Manager GLM software, the proprietary
Genelec monitor management network, and
all Genelec SAM monitors.

Managing the 7380A SAM subwoofer
using GLM software control unleashes
the full power of room compensation in
the 7380A SAM subwoofer, enabling 20

parametric room compensation lters. This

powerful room compensation functionality
is only available when the GLM is used.
Detailed information on the use with the
GLM network is presented in the GLM
System Operating Manual.

System setup

The 7380A SAM subwoofer reaches its full
potential when set up and calibrated using
the GLM software. Genelec Loudspeaker
Manager GLM and the proprietary Genelec

monitor management network oer

• automated acoustic equalization

individually for every monitor and
subwoofer

• automated level alignment

• distance (acoustic time-of-ight)

calibration

• aligning of the subwoofers for bass
management

for any reproduction system from stereo

to complex 3D immersive setups, including
one or more subwoofers. GLM setup is fast
and accurate. It can precisely address the
typical narrow-band low frequency modal
resonances and radiation loads of a room
and offers precise frequency response
compensations. The settings can be
controlled with a computer or the settings
can be permanently stored in the monitors
and subwoofers, to make the setup available
at all times even when the computer is not in
use. Genelec recommends setting up SAM
monitoring systems using the GLM. You

can nd a detailed description of the setup

process and the use of GLM in the GLM
System Operating Manual.

The setup using GLM is fast and consists of
the following steps:

• Connect a CAT5 (RJ45) cable between

each monitor (and subwoofer) and nally

to the control network input of the GLM
Adapter device (see Figure 1).

• Connect the GLM Adapter device to
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 GLM Adapter device to the
computer USB port using cable included
in the GLM User Kit.

• Download the GLM software at the
Genelec web site (www.genelec.com).

• Install the GLM software and follow the
instructions in the software to measure
and set up your system.

• If you plan to not use a computer for
controlling the subwoofer, use the GLM

software to write the setting into the
subwoofer (use menu item “Store | Store
the Current Group Settings…”).

After storing the acoustic settings using
the GLM software, when the GLM network is
disconnected, the settings are retrieved and
activated by setting the STORED switch to
the ON position.

With GLM software active and controlling
the 7380A SAM subwoofer, the use of analog
and digital inputs is controlled by the GLM
software entirely. In the software ‘Input Type’

in the ‘Group’ denition sets this. The GLM

software allows you to select and switch
between the analog and digital audio inputs.

When using the in-built settings (stand­alone manual mode), an AES/EBU digital
audio signal will override analog signal.
This means, if a valid digital audio clock is
detected, the digital audio is selected over
the analog audio.

When the GLM acoustic settings have
been stored in the 7380A SAM subwoofer
and are active, the input is selected by the
‘Group’ settings in the GLM software when
the settings are stored.

Setup Without GLM

Cabling

This subwoofer oers a xed 85 Hz analog

crossover filter. The fixed crossover filter
is pre-selected when the subwoofer is
delivered from the factory. All analog outputs

on the subwoofer are highpass ltered in this

mode of operation.

When using this method, run each signal
cable first to the subwoofer. Then, run a
cable from the respective output to a monitor.
When using the LFE signal, run the LFE
signal to the subwoofer LFE in connector.
No computer access to the subwoofer is
needed to use this crossover mode.

Stand-Alone Controls

Please note that there is a slight delay before

the controls listed below take eect. This is

normal.

The BASS ROLL-OFF controls
compensate for the very low frequency boost
caused by the boundary loading, reducing
the 20 Hz level in 4 dB steps. Individual
controls add together, applying both controls
adds to a total of 12 dB attenuation. Setting
both switches to the "OFF" position obtains

a at response.

The PHASE switches adjust the subwoofer
phase. This enables the subwoofer to be
put in phase with a selected main monitor.