D&B SL-GSUB, SL-SUB User Manual

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SL-SUB/SL-GSUB
Manual 1.2 en

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General information

SL-SUB/SL-GSUB Manual

Version: 1.2 en, 05/2018, D2731.EN .01

Copyright © 2018 by d&b audiotechnik GmbH; all rights
reserved.

Keep this manual with the product or in a safe place
so that it is available for future reference.

We recommend you to regularly check the d&b website for the
latest version of this manual.

When reselling this product, hand over this manual to the new
owner.

If you supply d&b products, please draw the attention of your
customers to this manual. Enclose the relevant manuals with the
systems. If you require additional manuals for this purpose, you
can order them from d&b.

d&b audiotechnik GmbH
Eugen-Adolff-Str. 134, D-71522 Backnang, Germany
T [phone], F [phone]
[e-mail], www.dbaudio.com

1. Safety precautions............................................................. 4

1.1. Information regarding the use of loudspeakers....................... 4

1.2. d&b ArrayCalc........................................................................... 5

2. SL-SUB/SL-GSUB loudspeaker....................................... 6

2.1. Intended use............................................................................... 6

2.2. Connections............................................................................... 7

2.3. Operation................................................................................... 7

2.3.1. Controller settings................................................................... 7

2.4. Technical specifications............................................................. 8

3. Manufacturer's declarations.......................................... 9

3.1.

EU conformity of loudspeakers (CE symbol)........................... 9

3.1.1. WEEE Declaration (Disposal)................................................ 9

Contents

d&b SL-SUB/SL-GSUB Manual 1.2 en 3

1.1. Information regarding the use of loudspeakers

Potential risk of personal injury

Never stand in the immediate vicinity of loudspeakers driven at a
high level. Professional loudspeaker systems are capable of
causing a sound pressure level detrimental to human health.
Seemingly non-critical sound levels (from approx. 95 dB SPL) can
cause hearing damage if people are exposed to it over a long
period.

In order to prevent accidents when deploying loudspeakers on the
ground or when flown, please take note of the following:

▪ When setting up the loudspeakers or loudspeaker stands, make

sure they are standing on a firm surface. If you place several
systems on top of one another, use straps to secure them
against movement.

▪ Only use accessories which have been tested and approved by

d&b for assembly and mobile deployment. Pay attention to the
correct application and maximum load capacity of the
accessories as detailed in our specific "Mounting instructions" or
in our "Flying system and Rigging manuals".

▪ Ensure that all additional hardware, fixings and fasteners used

for installation or mobile deployment are of an appropriate size
and load safety factor. Pay attention to the manufacturers'
instructions and to the relevant safety guidelines.

▪ Regularly check the loudspeaker housings and accessories for

visible signs of wear and tear, and replace them when
necessary.

▪ Regularly check all load bearing bolts in the mounting devices.

Potential risk of material damage

Loudspeakers produce a static magnetic field even if they are not
connected or are not in use. Therefore make sure when erecting
and transporting loudspeakers that they are nowhere near
equipment and objects which may be impaired or damaged by an
external magnetic field. Generally speaking, a distance of 0.5 m
(1.5 ft) from magnetic data carriers (floppy disks, audio and video
tapes, bank cards, etc.) is sufficient; a distance of more than 1 m
(3 ft) may be necessary with computer and video monitors.

1. Safety precautions

d&b SL-SUB/SL-GSUB Manual 1.2 en4

1.2. d&b ArrayCalc

For both safety and acoustic reasons, d&b line arrays must be
designed using the d&b ArrayCalc simulation software. The
software is available as a native stand-alone application for both
Microsoft Windows and Mac OS X operating systems and can be
downloaded at www.dbaudio.com.

Detailed information on how to use and operate ArrayCalc is
provided by the Help system of the software. To access the Help
system, press F1 or select the Help button (

) from
the ArrayCalc toolbar. This will launch the HelpViewer which
provides an overview of the program as well as a search function
and direct access to the related topics.

In addition, ArrayCalc will provide you with typical array
configurations within the permitted load limits and will help you get
familiar with the mechanical load conditions and limitations.

We also recommend you to attend the regularly hosted d&b Line
array training seminars. Further information regarding the d&b
seminars and a seminar schedule can also be found on the d&b
website at

www.dbaudio.com.

d&b ArrayCalc

d&b SL-SUB/SL-GSUB Manual 1.2 en 5

2.1. Intended use

NOTICE!

Only operate d&b SL-Series loudspeakers with a correctly
configured d&b D80 amplifier, otherwise there is a risk of
damaging the loudspeaker components and the directional
characteristics of the system cannot be achieved.

Product description

The SL-SUB and SL-GSUB are the cardioid subwoofers for the SL­Series. They can be used to supplement GSL8 and GSL12
cabinets, either flown (SL-SUB) or ground stacked (SL-GSUB).

When the GSL Flying frame is used, SL-SUB cabinets can be flown
in columns of up to 14 cabinets.

Both cabinets are actively driven, 2-way bass-reflex designs
housing three long excursion neodymium 21“ drivers. Two drivers
face to the front while one driver radiates to the rear of the cabinet.

Front and rear drivers are driven by separate amplifier/processing
channels and operate in independent bass reflex chambers.
Through its cardioid dispersion pattern, this setup avoids unwanted
energy behind the system and greatly reduces the reverberant field
at low frequencies providing highest accuracy in low frequency
reproduction.

The frequency response extends from 30 Hz to 90/ 70 Hz.

The cabinets are constructed from marine plywood and have an
impact and weather protected PCP (Polyurea Cabinet Protection)
finish. The front and rear of the cabinets are protected by rigid
metal grills. Each side panel incorporates four handles and
mounted on the rear panel are four heavy duty wheels.
Two runners extend from the rear to the front panel of each cabinet
protecting the bottom panel against scratching.
Two correspondingly shaped recesses are incorporated in the top
panel of each cabinet to accept these runners and prevent cabinet
movement when stacking SL-GSUBs or SL-SUBs.

The SL-SUB cabinet incorporates front and rear rigging strands
while the SL-GSUB comes without any rigging components and is
intended for ground stack purposes.

Cardioid dispersion

Cardioid dispersion avoids unwanted energy behind the system
and greatly reduces the excitation of the reverberant field at low
frequencies providing the greatest accuracy of low frequency
reproduction. The subwoofers can be used as stand-alone solutions
or in stacked combinations with a minimum distance of 60 cm (2 ft)
between adjacent cabinets or between the subwoofers and a side
wall. When positioned in front of walls, the minimum distance to
rear walls is maintained by the wheels mounted at the rear of the
cabinet.

Cardioid dispersion pattern

2. SL-SUB/SL-GSUB loudspeaker

d&b SL-SUB/SL-GSUB Manual 1.2 en6

SL-Series rigging components and arrays

Cabinets are mechanically connected using the rigging strands on
both sides of the cabinet front and a central strand at the rear of
the cabinet. All necessary rigging components are mounted on the
cabinet and fold out or slide out when needed.

A detailed description of the SL-Series rigging components is given
in the SL-Series Rigging manual.

2.2. Connections

The cabinets are fitted with a single NLT4 F connector using the pin
assignment 1+/1– for the front drivers and pins 2+/2– for the
rear driver.

d&b LoadMatch

With the d&b four channel amplifier platform, the LoadMatch
function enables the amplifier to electrically compensate for the
properties of the loudspeaker cable used without the need for an
additional sense wire. For applicable loudspeakers, LoadMatch is
therefore independent of the connector type used.

2.3. Operation

Amplifier output mode(s): 2-Way Active

Application Setup Cabinets per

pair of amplifier
channels

SL-SUB SL-SUB

SL-SUB AP

1

SL-GSUB SL-SUB 1

In its standard mode the SL-SUB/SL-GSUB can be used as
subwoofer for applicable d&b loudspeaker systems operated in
CUT mode. The two channels of the system are tuned to create a
cardioid dispersion pattern thus providing maximum rejection to the
rear. It can be used in flown or stacked combinations with a
minimum distance of 60 cm (2 ft) between adjacent columns of
cabinets.

AP setup

In connection with d&b ArrayProcessing (AP), the AP setup
contains the AP data that are generated in the ArrayCalc
simulation software and transferred to the applicable amplifiers via
the d&b Remote network (OCA/AES70) using R1.

As soon as the data have been sent to the amplifiers, the AP setup
will be automatically activated.

2.3.1. Controller settings

INFRA mode

With the INFRA mode selected, the upper operating frequency of
the system is reduced from 90 Hz to 70 Hz. The SL-SUB/SL-GSUB
can now be used to supplement applicable d&b loudspeaker
systems operated in full range mode.

NLT4 F connector wiring

d&b SL-SUB/SL-GSUB Manual 1.2 en 7

2.4. Technical specifications

System data

Frequency response (–5 dB standard) 30 Hz - 90 Hz
Frequency response (–5 dB INFRA mode) 30 Hz - 70 Hz
Max. sound pressure (1 m, free field) 144 dB

(SPLmax: Broadband signal IEC 60268)

Loudspeaker data

Nominal impedance front/rear 3/6 ohms
Power handling capacity front (RMS/peak 10 ms) 1000/4000 W
Power handling capacity rear (RMS/peak 10 ms) 500/2000 W
Components 3 x 21" driver
Connections 1 x NLT4 F
Pin assignment

NLT4 F: 1+: Front+/ 1–: Front– / 2+: Rear+/ 2–: Rear–
Weight SL-SUB 138 kg (304 lb)
Weight SL-GSUB 132 kg (291 lb)

SL-SUB cabinet dimensions in mm [inch]*
*The same dimensions apply to the SL-GSUB

SL-SUB/SL-GSUB frequency response, standard and INFRA mode

d&b SL-SUB/SL-GSUB Manual 1.2 en8

3.1. EU conformity of loudspeakers (CE symbol)

This declaration applies to:

d&b SL-SUB loudspeaker, Z0760

d&b SL-GSUB loudspeaker, Z0761

manufactured by d&b audiotechnik GmbH.

All production versions of these types are included, provided they
correspond to the original technical version and have not been
subject to any later design or electromechanical modifications.

We herewith declare that said products are in conformity with the
provisions of the respective EC directives including all applicable
amendments.

A detailed declaration is available on request and can be ordered
from d&b or downloaded from the d&b website at

www.dbaudio.com.

3.1.1. WEEE Declaration (Disposal)

Electrical and electronic equipment must be disposed of separately
from normal waste at the end of its operational lifetime.

Please dispose of this product according to the respective national
regulations or contractual agreements. If there are any further
questions concerning the disposal of this product, please contact
d&b audiotechnik.

3. Manufacturer's declarations

d&b SL-SUB/SL-GSUB Manual 1.2 en 9

D2731.EN .01, 05/2018 © d&b audiotechnik GmbH

www.dbaudio.com