d & b audiotechnik V-GSUB User manual

VV-GSUB
Manual 1.2 en

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General information
V-GSUB Manual
Version: 1.2 en, 10/2016, D2723.EN .01
Copyright © 2016 by d&b audiotechnik GmbH; all rights
reserved.
Keep this document 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 document.
When reselling this product, hand over this document to the new
owner.
If you supply d&b products, please draw the attention of your
customers to this document. Enclose the relevant documents with
the systems. If you require additional documents for this purpose,
you can order them from d&b.
d&b audiotechnik GmbH
Eugen-Adolff-Straße, D-71522 Backnang, Germany
T [phone], F [phone]

1 Safety precautions.............................................................. 4
1.1 Information regarding the use of loudspeakers........................ 4
2 V-GSUB loudspeaker.......................................................... 5
2.1 Product description..................................................................... 5
2.2 Connections................................................................................ 6
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 V-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 V-GSUB Manual 1.2 en4

2.1 Product description
The V-GSUB is a compact high performance cardioid subwoofer
for use with d&b V-Point cabinets.
The V-GSUB houses two long excursion neodymium drivers in an
integrated cardioid setup: an 18“ driver in a bass-reflex design
facing to the front and a 12” driver in a two chamber bandpass
design radiating to the rear. The arrangement and tuning provide a
cardioid dispersion pattern using a single amplifier channel.
Its frequency response extends from 37 Hz to 115/95 Hz.
The cabinet is constructed from marine plywood and has an impact
and weather protected PCP (Polyurea Cabinet Protection) finish.
The front of the loudspeaker cabinet is protected by a rigid metal
grill backed by an acoustically transparent foam. Each side panel
incorporates two handles and mounted on the rear panel are four
heavy duty wheels. An M20 threaded flange in the top panel
accepts a loudspeaker stand for the deployment of TOP cabinets.
Two runners recessed in the bottom panel prevent cabinet
movement and protect the bottom panel against scratching.
Correspondingly shaped recesses in the top panel of the cabinet
prevent cabinet movement when stacking V-GSUBs.
In addition, the top panel has a recess in the form of the footprint
of a V-Point TOP cabinet to prevent cabinet movement when
stacking one V-Point TOP cabinet on V-GSUBs.
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.
V-GSUB loudspeaker
Cardioid dispersion pattern
2 V-GSUB loudspeaker
d&b V-GSUB Manual 1.2 en 5

2.2 Connections
The cabinet is fitted NLT4 F/M connectors. All four pins of both
connectors are wired in parallel. The V-GSUB uses the pin
assignments 2+/2–. Pins 1+/1– are designated to TOP cabinets.
Using one as the input, the second connector allows for direct
connection to a second cabinet.
The cabinet can be supplied with NL4 M or EP5 connectors as an
option.
Pin equivalents of the connector options are listed in the table
below.
NLT4 F/M
NL4 M 1+ 1– 2+ 2– n.a.
EP5 1 2 3 4 5 (SenseDrive
front)
d&b LoadMatch
Starting with the D80 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.
d&b SenseDrive
The SenseDrive feature within D12 amplifiers enables electrical
compensation for the properties of the loudspeaker cable used.
SenseDrive requires an additional sense wire. SenseDrive is
therefore only available with EP5 connectors and 5-wire cabling
for applicable loudspeakers.
Note: When the D12 is operated in "Mix TOP/SUB mode",
the SenseDrive function is only available at the output B
connector.
NLT4 F/M, NL4 M and EP5 connector wiring
d&b V-GSUB Manual 1.2 en6

2.3 Operation
NOTICE!
Only operate d&b loudspeakers with a correctly configured d&b
amplifier, otherwise there is a risk of damaging the loudspeaker
components.
Applicable d&b amplifiers:
D80/D20/D12/30D.
Application Setup Cabinets per
channel
V-GSUB V-SUB 2
Within applicable d&b amplifiers, the controller setup is available
in Dual Channel or Mix TOP/SUB mode.
2.3.1 Controller settings
For acoustic adjustment the 100 Hz mode can be selected.
100 Hz mode
With the 100 Hz mode selected, the upper operating frequency of
the system is reduced from 115 Hz to 95 Hz.
It can be used when actively driven V-GSUBs are used to
supplement V-Point cabinets operated in full range mode. The
100 Hz mode can also be used to compensate for the effect of
close coupling between the V-GSUB and V-Point cabinets operated
in CUT mode.
d&b V-GSUB Manual 1.2 en 7

2.4 Technical specifications
V-GSUB system data
Frequency response (–5 dB standard) 37 Hz - 115 Hz
Frequency response (–5 dB 100 Hz mode) 37 Hz - 95 Hz
Max. sound pressure (1 m, free field)
with D12/D20/30D 133 dB
with D80 137 dB
(SPLmax peak, pink noise test signal with crest factor of 4)
V-GSUB loudspeaker
Nominal impedance 8 ohms
Power handling capacity (RMS/peak 10 ms) 800/3200 W
Components 1 x 18“ driver
1 x 12“ driver
Connections 2 x NLT4 F/M
optional 2 x NL4 M or 2 x EP5
Pin assignment NLT4 F/M and NL4 M: 2+ / 2–
EP5: 3: + / 4: –
Weight 61 kg (135 lb)
V-GSUB cabinet dimensions in mm [inch]
V-GSUB frequency response, standard and 100 Hz mode
d&b V-GSUB Manual 1.2 en8

3.1 EU conformity of loudspeakers (CE symbol)
This declaration applies to:
d&b V-GSUB loudspeaker, Z0519
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 V-GSUB Manual 1.2 en 9

D2723.EN .01, 10/2016 © d&b audiotechnik GmbH
www.dbaudio.com