d & b audiotechnik B2-SUB User manual

B2-SUB
Manual (3.2 EN)

Symbols on the equipment
Please refer to the information in the operating manual.
WARNING!
Dangerous voltage!
Contents
Safety precautions...............................................................3
Information regarding use of loudspeakers...............................................3
B2-SUB..................................................................................4
Connections.........................................................................................................4
Operation with D12..........................................................................................5
Operation with A1............................................................................................6
Technical specifications.....................................................................................7
Manufacturer's declarations................................................8
EU conformity of loudspeakers (CE symbol)..............................................8
WEEE Declaration (Disposal)..........................................................................8
General Information
B2-SUB Manual
Version 3.2 EN, 03/2010, D2091.E .03
Copyright © 2008 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.
When reselling this product, handout this manual to the new customer.
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-Strasse 134, D-71522 Backnang, Germany
Telephone [phone], Fax [phone]
E-mail: [email protected], Internet: www.dbaudio.com

Safety precautions
Information regarding use of loudspeakers
WARNING! 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.
CAUTION! 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.
B2-SUB Manual (3.2 EN) Safety precautions - 1

B2-SUB
Fig. 1: B2-SUB
The B2-SUB is an actively driven subwoofer which uses a pair of 18" LF
drivers mounted in a bandpass horn cabinet.
The B2-SUB cabinet is constructed from marine plywood and has an
impact resistant paint finish. The front of the loudspeaker cabinet is fitted
with a rigid metal grill covered with a replaceable acoustically
transparent foam. The cabinet is equipped with catches at the top and
bottom to secure an optional transport lid E7911. It incorporates eight
steel handles and on the rear panel four heavy duty wheels.
NOTICE: Only operate B2-SUB loudspeakers with a correctly configured d&b
amplifier, otherwise there is a risk of damaging the loudspeaker
components.
Connections
1
2
3
4
5Sense Drive
n.c.
Fig. 2: Connector wiring
The B2-SUB cabinet is fitted with a single EP5 connector and uses the
pin assignments 3/4 and 5 (Pin 5: SenseDrive - D12 in conjunction with
5-wire cables). The B2-SUB can be supplied with a single NL4 or NL8
connector as an option.
Pin equivalents of EP5, NL4 and NL8 connectors are listed in the table
below.
The B2-SUB can be supplied with a single CACOM connector as an
option to drive the B2-SUB cabinet with the d&b A1 mainframe.
SenseDrive is also available when the B2-SUB is driven by the A1
mainframe.
EP5 1 2 3 4 5 (SenseDrive)
NL4 2+ 2– n.a.
NL8
(Z0056.600)
/ / 1+ 1– 3– (SenseDrive)
NL8
(Z0056.601)
4+ 4– 3– (SenseDrive)
B2-SUB Manual (3.2 EN) Page 4 of 8

Operation with D12
Select the controller setup B2-SUB.
This is available in "Dual Channel" and "Mix TOP/SUB" mode and
enables a single B2-SUB cabinet to be driven by the respective channel.
Controller settings
In standard mode the B2-SUB can be used as subwoofer for the d&b C-
and Q-Series systems (CUT mode). The upper cut-off frequency of
100 Hz (like Q-SUB) is lower than the cut-off frequency of an A1
mainframe with B2 Controller, which was tuned for the use with the d&b
F2 system.
INFRA
Selecting the INFRA switch restricts the B2 frequency response to a
narrow, 32 Hz – 68 Hz range (–5 dB). This transforms a B2 into an
infrabass system for use with d&b C- and Q-Series loudspeakers.
CSA
frontrear
Fig. 3: CSA Stack (Example)
CSA (Cardioid Subwoofer Array) is a method to combine three or
multiples of three subwoofer cabinets to form an array with exceptional
directivity at low frequencies.
A B2-SUB cabinet driven in CSA mode eliminates the energy radiated
to the rear of the two front radiating B2-SUB cabinets (CSA not
selected).
CSA decreases the low end diffuse sound field, significantly improving
the direct-to-diffuse energy ratio in the audience areas.
Please note that all other settings of the amplifiers driving a CSA have
to be identical (input signal, level, INFRA, EQ, delay). Do not use this
mode with any other configuration of B2-SUB systems.
Please refer to d&b TI 330 (d&b code D5330.E), which describes the
setup in detail. The TI can be downloaded from the d&b website at
www.dbaudio.com.
B2-SUB Manual (3.2 EN) Page 5 of 8

Operation with A1
GR
ISP
OV
INFR A
MUTE
B2-CO
I D
-12dB
- 6 + 6
0
Fig. 4: Controls on B2-SUB
controller module
OUTPUT PIN ASSIGNMENT
A LOW OUT +
B LOW OUT -
C SPEAKER ID
D SPEAKER ID
E SENSE DRIVE +
F SENSE DRIVE -
G nc
H nc
B2 INPUT
INPUT LINK
C4 OUT
Fig. 5: B2-SUB controller rear panel
One B2-SUB cabinet can be driven by a single A1 mainframe fitted with
a B2-SUB controller module.
In standard mode the A1/B2 system is dedicated for the use with d&b
F2 systems.
INFRA
The INFRA setting is available. The characteristics of the INFRA setting
are explained in the previous section "Operation with D12 - Controller
settings".
Controller module rear panel
A single 8 pin CACOM output socket is fitted to the module rear panel.
An additional balanced XLR output marked C4-OUT is also provided on
the module rear panel. The C4-OUT signal can be used to drive C4-
SUB controller inputs when a B2 is used as an infrabass system for C4-
SUBs. In case of a power or mainframe failure, a bypass relay in the B2
controller module connects the pins of the C4-OUT socket directly to
those of the module INPUT socket allowing the continued operation of
the C4-SUB and TOP cabinets.
B2-SUB Manual (3.2 EN) Page 6 of 8

Technical specifications
Fig. 6: B2-SUB frequency response,
standard and INFRA mode
B2-SUB system data (standard/INFRA)
Frequency response (–5 dB) D12..........................37 Hz - 100 Hz / 32 Hz - 68 Hz
Frequency response (–5 dB) A1.............................37 Hz - 125 Hz / 32 Hz - 68 Hz
Max. sound pressure (1 m, full space) D12 or A1..........................139 dB / 136 dB
(SPLmax peak, test signal pink noise with crest factor 4)
Input level for 100 dB SPL / 1 m....................................................–20 dBu / –19 dBu
B2-SUB subwoofer
Nominal impedance..................................................................................................4 ohms
Power handling capacity (RMS / peak 10 ms)....................................600 / 2400 W
Connections................................................................................................................1 x EP5
optional.................................................................................................1 x NL4 or 1 x NL8
Pin assignments.......................................................EP5: 3/4 and 5 (Pin 5: SenseDrive)
.............................................................................................................................NL4: 2+/2–
..............................................................NL8 (Z0056.600): 1+/1– (Pin 3–: SenseDrive)
..............................................................NL8 (Z0056.601): 4+/4– (Pin 3–: SenseDrive)
optional....................................................................................................1 x CACOM (A1)
Pin assignments printed on the controller module rear panel
Weight.........................................................................................................102 kg (225 lb)
Fig. 7: B2-SUB cabinet dimensions in mm [inch]
B2-SUB Manual (3.2 EN) Page 7 of 8

Manufacturer's declarations
EU conformity of loudspeakers (CE symbol)
This declaration applies to
- B2-SUB Z0056
manufactured by d&b audiotechnik GmbH.
All production versions of this type 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.
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.
D2091.E .03, 03/2010 © d&b audiotechnik GmbH
d&b audiotechnik GmbH, Eugen-Adolff-Str. 134, D-71522 Backnang, Germany, Phone [phone], Fax [phone]