d b audiotechnik V-GSUB High Performance Cardioid Subwoofer User Manual
- June 9, 2024
- d b audiotechnik
Table of Contents
d b audiotechnik V-GSUB High Performance Cardioid Subwoofer User Manual
Safety precautions
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 deployment. Pay attention to the correct application and maximum load capacity of the accessories as detailed in our specific “Mounting instructions” or in our “Rigging manuals”.
- Ensure that all additional hardware, fixings and fasteners used for 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 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.
V-GSUB loudspeaker
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.
Cardioid dispersion pattern
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 Load Match 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, Load Match is therefore independent of the connector type used.
d &b SenseDrive
The Sense Drive feature within D12 amplifiers enables electrical compensation
for the properties of the loudspeaker cable used. Sense Drive requires an
additional sense wire. Sense Drive is therefore only available with EP5
connectors and 5-wire cabling for applicable loudspeakers.
NLT4 F/M, NL4 M and EP5 connector wiring
Note: When the D12 is operated in “Mix TOP/SUB mode”, the Sense Drive function is only available at the output B connector.
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/D40/D20/D12.
Amplifier output mode(s): Dual Channel or Mix TOP/SUB
Application| Setup| Cabinets per channel
V-GSUB| V-SUB| 2 *****
- When using the D40/40D amplifiers and maximum output is required, it is recommended to only drive one V-GSUB per amplifier channel. Two V-GSUBs in parallel per channel are possible, but this is only recommended for applications with reduced output demand.
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 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 subwoofer and V-Point cabinets operated in CUT mode.
With T-Series cabinets the standard mode is recommended.
Technical specifications
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 D20/D12 133 dB
- with D80/D40 137 dB (SPLmax peak, pink noise test signal with crest factor of 4)
Loudspeaker data
- 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 frequency response, standard and 100 Hz mode
Dimension
Manufacturer’s declarations
Conformity of loudspeakers
This declaration applies to:
d &b Z0519 V-GSUB loudspeaker
by d&b audiotechnik GmbH & Co. KG.
All product variants 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 directives including all applicable amendments.
Detailed and applicable declarations are 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.
WEEE-Reg.-Nr. DE: 13421928
General information
V-GSUB Manual
Version: 1.3 en, 09/2022, D2723.EN .01
Copyright © 2022 by d&b audiotechnik GmbH & Co. KG; 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 & Co. KG
Eugen-Adolff-Str. 134, D-71522 Backnang, Germany
T +49-7191-9669-0, F +49-7191-95 00 00
http://www.dbaudio.com/
