Q7 Manual 2.4EN(1)
Q7
Manual (2.4 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
Q7 .........................................................................................4
Connections.........................................................................................................4
Operation with D6 or D12.............................................................................5
Operation with E-PAC......................................................................................5
Dispersion characteristics.................................................................................6
Technical specifications.....................................................................................7
Altering the HF horn dispersion.....................................................................8
Arraying Q7 cabinets.......................................................................................8
Manufacturer's declarations................................................9
EU conformity of loudspeakers (CE symbol)..............................................9
WEEE Declaration (Disposal)..........................................................................9
General Information
Q7 Manual
Version 2.4 EN, 03/2008, D2041.E.02
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, hand over 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 +49-7191-9669-0, Fax +49-7191-95 00 00
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 noncritical 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!
Q7 Manual
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.
(2.4 EN)
Safety precautions - 1
Q7
The Q7 is a 75° x 40° passive two-way loudspeaker. It houses 2 x 10"
LF drivers and a 1.3" HF compression driver with a rotatable CD horn
and a passive crossover network. Its frequency response extends from
60 Hz to above 17 kHz. The two 10“ neodymium LF drivers are
positioned in a dipolar arrangement providing exceptional vertical
dispersion control even at lower frequencies.
The Q7 cabinet is constructed from marine plywood and has an impact
resistant paint finish. The front of the loudspeaker cabinet is protected
by a rigid metal grill, covered with a replaceable acoustically
transparent foam. The cabinet incorporates a pair of handles.
The Q7 cabinet is fitted with four types of rigging devices:
- Eight sockets in the front grill and rear edge bar that accept the
Z5153 Locking pins 8 mm to connect the array links.
Fig. 1: Q7 loudspeaker
- A quick lock adapter plate on one side of the cabinet that accepts the
Z5150 Q Swivel bracket or the Z5156 Q Flying adapter.
- Five sockets that accept the Z5048 Flying pin 10 mm to support
single cabinets and to secure the aiming of an array.
- Four M10 threaded inserts to accept the Z5020 Flying adapter 02,
Z5025 Flying adapter 03 or Z5043 MAX Horizontal bracket.
NOTICE:
Only operate Q7 loudspeakers with a correctly configured d&b
amplifier, otherwise there is a risk of damaging the loudspeaker
components.
Connections
1
2
3
4
5
passive
crossover
1
2
3
4
5
The Q7 cabinet is fitted with a pair of EP5 connectors. All five pins of
both connectors are wired in parallel. The Q7 uses the pin assignments
1/2. Pins 3/4 and 5 are designated to Q-SUB active subwoofers, where
pin 5 is used for SenseDrive (only available when using a D12 amplifier
and 5-wire cabling). Using the male connector as the input, the female
connector allows for direct connection to additional loudspeakers.
The Q7 can be supplied with NL4 output connectors as an option. Pin
equivalents of EP5 and NL4 connectors are listed in the table below.
Fig. 2: Connector wiring
Q7 Manual
EP5
1
2
3
4
5
NL4
1+
1–
2+
2–
n.a.
(2.4 EN)
Page 4 of 10
Operation with D6 or D12
Select the controller setup Q7.
Within the D12 amplifier this is available in "Dual Channel" and "Mix
TOP/SUB" mode.
Up to a total of two Q7 loudspeakers can be driven by each D6 or D12
amplifier channel.
In applications with low continuous levels and low ambient temperatures
up to three cabinets can be connected to a D12 channel.
Controller settings
For acoustic adjustment the functions CUT, HFA and CPL can be
selected.
CUT circuit
Set to CUT, the Q7 low frequency level is reduced. The Q7 is now
configured for use with the Q-SUB or d&b C-Series subwoofers.
HFA circuit
In HFA mode (High Frequency Attenuation), the HF response of the Q7
system is rolled off. The HFA circuit provides a natural, balanced
frequency response when a unit is placed close to listeners in near field
or delay use.
10
5
0
-5
High frequency attenuation begins gradually at 1 kHz, dropping by
approximately 3 dB at 10 kHz. This roll-off mimics the decline in
frequency response experienced when listening to a system from a
distance in a typically reverberant room or auditorium.
-10
-15
-20
-25
-30
20
100
1k
10k
20k
Fig. 3: Frequency response correction of
HFA circuit
CPL circuit
The CPL (Coupling) circuit compensates for coupling effects between the
cabinets when building closely coupled arrays. CPL begins gradually at
1 kHz, with maximum attenuation below 400 Hz, providing a balanced
frequency response when Q7 cabinets are used in arrays of two or
more. The function of the CPL circuit is shown in the diagram opposite
and can be set in dB attenuation values between –9 and 0, or a positive
CPL value which creates an adjustable low frequency boost around
65 Hz (0 to +5 dB).
Fig. 4: Frequency response correction of
CPL circuit
Operation with E-PAC
Selecting Q7 mode enables the E-PAC to drive one Q7 loudspeaker.
LO IMP mode configures the E-PAC to drive a maximum of two Q7
loudspeakers with a 6 dB reduction in input level to the loudspeakers.
For acoustic adjustment the functions CUT and CPL can be selected. The
characteristics of the CUT and CPL settings are explained in the previous
section "Operation with D6 or D12 - Controller settings".
The E-PAC CPL circuit creates a 3 dB attenuation corresponding with
the –3 dB curve shown in Fig. 4.
Q7 Manual
(2.4 EN)
Page 5 of 10
Dispersion characteristics
The graphs below show dispersion angle over frequency of a single Q7
cabinet plotted using lines of equal sound pressure (isobars) at –6 dB
and –12 dB.
Fig. 5: Isobar diagram Q7 horizontal,
standard set up
Fig. 6: Isobar diagram Q7 vertical,
standard set up
Fig. 7: Isobar diagram Q7 horizontal,
horizontal set up with the horn rotated
Fig. 8: Isobar diagram Q7 vertical,
horizontal set up with the horn rotated
Q7 Manual
(2.4 EN)
Page 6 of 10
Technical specifications
Q7 system data
Frequency response (–5 dB standard).................................................60 Hz ... 17 kHz
Frequency response (–5 dB CUT mode)...........................................100 Hz ... 17 kHz
Max. sound pressure (single cabinet, 1 m, free field) with D12.....................138 dB
Max. sound pressure (single cabinet, 1 m, free field) with D6.......................134 dB
(SPLmax peak, pink noise test signal with crest factor of 4)
Input level (100 dB-SPL/1 m)...............................................................................–17 dBu
15°
204.5 [8.05"]
308 [12.13"]
Fig. 9: Q7 frequency response, standard
and CUT settings
Q7 loudspeaker
Nominal impedance..................................................................................................8 ohms
Power handling capacity (RMS / peak 10 ms).......................................400/1600 W
Nominal dispersion angle (hor. x vert.)...........................................................75° x 40°
Components...................................................................................................2 x 10” driver
.........................................................................................................1.3” compression driver
....................................................................................................Passive crossover network
Connections................................................................................................................2 x EP5
...................................................................................................................(optional 2 x NL4)
Pin assignments.......................................................................................................EP5: 1/2
..............................................................................................................................NL4: 1+/1–
Weight...............................................................................................................22 kg (49 lb)
410 [16.14"]
580 [22.83"]
Fig. 10: Q7 cabinet dimensions in mm [inch]
Q7 Manual
(2.4 EN)
Page 7 of 10
Altering the HF horn dispersion
The Q7 HF horn has a square flange allowing it to rotate through 90°.
It can easily be accessed through an aperture in the front grill.
CAUTION !
Potential risk of personal injury due to falling objects.
The HF horn of the Q7 cabinets up to serial No.:
Z050700000374 with EP5 connectors
Z050700000217 with NL4 connectors
is not equipped with a safety wire against falling out.
- Ensure that all four self-locking screws are replaced and
properly tightened. Otherwise there is a risk of the horn and
the driver falling out of the front of the cabinet.
- Before setting up Q7 loudspeakers always ensure that the
horn is mounted correctly.
Tools required: 3 mm Allen key (Torque wrench).
Fig. 11: Q7 horn dispersion label
1.
Undo the four countersunk Allen screws of the horn.
2.
Rotate the horn through 90° - Fig. 11.
3.
Refit the horn and tighten the four screws of the horn to a
torque of 2 Nm.
Arraying Q7 cabinets
Horizontal array of Q7 cabinets
The horizontal angle between adjacent Q7 cabinets can be set to
between 40° and 60°. The most even energy distribution is achieved
with 50°.
Vertical array of Q7 cabinets
The vertical angle between adjacent Q7 cabinets can be set to between
20° and 40°. The most even energy distribution is achieved with 35°.
Smaller angles between the cabinets will give a smaller coverage area
but will produce higher sound pressure on the center axis of the array.
Q7 used in line array columns with Q1s and Q-SUBs
The Q7 with the horn rotated can be positioned at the bottom of a Q1
line array column to extend the near field coverage horizontally and
vertically, if required. When the standard Q1 array links are used to
connect the Q7 cabinet the splay should be set to a maximum of 14°.
Q7 Manual
(2.4 EN)
Page 8 of 10
Manufacturer's declarations
EU conformity of loudspeakers (CE symbol)
This declaration applies to
- Q7 loudspeaker
Z0507
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.
Q7 Manual
(2.4 EN)
Page 9 of 10
D2041.E.02, 03/2008 © d&b audiotechnik GmbH
d&b audiotechnik GmbH, Eugen-Adolff-Str. 134, D-71522 Backnang, Germany, Phone +49-7191-9669-0, Fax +49-7191-95 00 00
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