d & b audiotechnik C690 User manual

C6/C690
Manual
(3.0E)

General Information
C6/C690 Manual
Version 3.0E, 10/2003, D2077.E.03
© by d&b audiotec nik AG 2003; all rig ts reserved.
T e information contained in t is manual as been carefully
c ecked for accuracy, at t e time of going to press, owever no
guarantee is given wit respect to t e correctness.
d&b audiotec nik AG accepts no responsibility for any errors or
inaccuracies t at may appear in t is manual or t e products and
software described in it.
Tec nical specifications, dimensions, weig ts and properties do not
represent guaranteed qualities.
As manufacterers we reserve t e rig t to make alterations and
modifications wit in t e framework of legal provisions, as well as
c anges aimed at improving quality.
d&b audiotec nik AG
Eugen-Adolff-Strasse 134, D-71522 Backnang, Germany
Telep one [phone], Fax [phone]
E-mail: [email protected], Internet: www.dbaudio.com
References in the manual
WAR I G!
This refers to a potentially dangerous situation
which may lead to personal injury.
CAUTIO !
This refers to a potentially dangerous situation
which may lead to damage to the equipment.
IMPORTA T!
This refers to a situation which may cause the
equipment to malfunction.
Symbols on the equipment
Please refer to the information in the operating
manual.
WAR I G!
Dangerous voltage!

C6/C690 Manual (3.0E) Page 3 of 8
C6/C690 Manual (3.0E) Safety instructions
Safety precautions
Before you use our products, read the manual
carefully and observe all the safety precautions.
They will protect you and help to avoid equipment
failures.
Keep this manual in a safe place so that it is
available for future reference.
If you supply d&b products, please draw the
attention of your customers to these safety
guidelines. Enclose the relevant manuals with the
systems. If you require additional manuals for this
purpose, you can order them from d&b.
Information regarding use of loudspeakers
WAR I G!
Never stand in t e immediate vicinity of loudspeakers driven at a
ig level. Professional loudspeaker systems are capable of causing
a sound pressure level detrimental to uman ealt . Seemingly non-
critical sound levels (from approx. 95 dB SPL) can cause earing
damage if people are exposed to it over a long period.
In order to prevent accidents w en deploying loudspeakers on t e
ground or w en flown, please take note of t e following:
W en setting up t e loudspeakers or loudspeaker stands, make sure
t ey are standing on a firm surface. If you place several systems on
top of one anot er, use straps to secure t em against movement.
Only use accessories w ic ave been tested and approved by d&b
for assembly and mobile deployment. Pay attention to t e correct
application and maximum load capacity of t e accessories as
detailed in our specific “Mounting instructions” or in our "Flying
system and Rigging manuals”.
Ensure t at all additional ardware, fixings and fasteners used for
installation or mobile deployment are of an appropriate size and
load safety factor. Pay attention to t e manufacturers instructions
and to t e relevant safety guidelines.
Regularly c eck t e loudspeaker ousings and accessories for visible
signs of wear and tear, and replace t em w en necessary.
Regularly c eck all load bearing bolts in t e mounting devices.
CAUTIO !
Loudspeakers produce a static magnetic field even if t ey are not
connected or are not in use. T erefore make sure w en erecting
and transporting loudspeakers t at t ey are now ere near
equipment and objects w ic 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 t an 1 m
(3 ft) may be necessary wit computer and video monitors.

C6/C690 Manual (3.0E) Page 4 of 8
C6
T e C6 loudspeaker is a full range, two-way bass-reflex enclosure
fitted wit a 12" LF driver passively connected to a 2" HF
compression driver w ic is coupled to a 60
° x 40 ° CD orn.
T e C6 cabinet is constructed from marine plywood and as an
impact resistant paint finis . T e front of t e loudspeaker cabinet is
fitted wit a rigid metal grill covered wit a replaceable
acoustically transparent foam. T e cabinet top plate as an integral
andle and four M10 t readed inserts for mounting brackets and
rigging. T e L s aped metal plate at t e bottom of t e cabinet also
incorporates a andle, four M10 t readed inserts and a socket to
accept a loudspeaker stand.
Version C690
T e C690 as a wider orizontal and vertical dispersion t an t e
C6, t e only difference being t e 90
° x 50 ° CD orn.
CAUTIO !
Only operate C6/C690 cabinets wit a d&b D12 or E-PAC
amplifier in C6 mode or a P1200A mainframe fitted wit a C6
controller module, ot erwise t ere is a risk of damaging t e
loudspeaker components.
Connections
1
2
3
4
5
1
2
3
4
5
passive
crossover
Connector wiring
T e C6/C690 cabinets are fitted wit a pair of EP5 connectors. All
pins of bot connectors are wired in parallel. T e C6 uses t e pin
assignments 1/2. Pins 3/4 and 5 are designated to d&b active
subwoofers.
Using one connector as t e input, t e second connector allows for
direct connection to additional cabinets.
T e C6/C690 can be supplied wit NL4 output connectors as an
option using t e pin assignment 1+/1–. Pins 2+/2– are designated
to d&b active subwoofers.
Pin equivalents of EP5 and NL4 connectors are listed in t e table
below.
EP5
1 2 3 4 5 (SenseDrive SUB)
L4
1+ 1– 2+ 2– n.c.
EP5 and L4 pin assignments

C6/C690 Manual (3.0E) Page 5 of 8
Operation with D12
Selecting C6 mode in t e D12 enables up to two C6/C690
cabinets to be driven by eac c annel. In applications wit low
continuous levels and low ambient temperatures up to t ree
cabinets per c annel may be connected.
W en t e D12 is operated in "Mix TOP/SUB" mode t e C6/C690
cabinet and a respective active subwoofer can be linked toget er
locally and fed by a single 4-wire cable from eit er amplifier
output connector.
IMPORTA T!
To apply SenseDrive for t e subwoofer, EP5 connectors and 5-wire
cables ave to be used. W en operated in "Mix TOP/SUB" mode
t e subwoofer as to be fed from t e output B connector of t e
D12 amplifier.
Controller settings
For acoustic adjustment t e settings CUT, HFA and CPL can be
selected.
CUT
Set to CUT, a ig pass filter wit a 110 Hz cut off frequency is
inserted in t e controller signal pat . T e C6/C690 is now
configured for use wit d&b active subwoofers.
HFA circuit
-5
0
5
10
-10
-15
-20
-25
-30
20 100 1k 10k
20k
Frequency response of HFA circuit
In HFA mode (Hig Frequency Attenuation), t e HF response of t e
C6/C690 is rolled off. T e HFA provides a natural, balanced
frequency response w en a unit is placed close to listeners in near
field or delay use.
Hig Frequency Attenuation begins gradually at 1 kHz, dropping
by approximately 3 dB at 10 kHz. T is roll off mimics t e decline in
frequency response experienced w en listening to a system from a
distance in a typically reverberant room or auditorium.
CPL circuit
Frequency response of CPL circuit
T e CPL (Coupling) circuit compensates for coupling effects
between t e cabinets w en building closely coupled arrays. CPL
begins gradually at 1 kHz, wit maximum attenuation below
250 Hz, providing a balanced frequency response w en C6/C690
cabinets are used in arrays of two or more. T e function of t e CPL
circuit in t e D12 amplifier is s own in t e diagram opposite and
can be set in dB attenuation values between –9 and 0, or a positive
CPL value w ic creates an adjustable low frequency boost around
65 Hz (0 to +5 dB).

C6/C690 Manual (3.0E) Page 6 of 8
Operation with E-PAC
REMOTE
LO IMP
DELAY ON
CUT
HFA
SPKR
21345687
ON
E-PAC Configuration for C6
(E-PAC version 2)
To drive C6/C690 cabinets t e E-PAC as to be configured to C6
mode.
For an E-PAC version 2, t e configuration is selected by setting t e
appropriate DIP switc es on t e rear panel.
For an E-PAC version 3, t e configuration is set via t e encoder in
conjunction wit t e LCD. Selecting C6 mode enables one C6/C690
cabinet to be driven at an output power of 300 Watts. LO IMP
mode allows t e E-PAC to drive two C6/C690 cabinets wit a 6 dB
reduction of input level to t e loudspeakers.
T e CUT and HFA settings are available. T e c aracteristics of t e
CUT and HFA settings are explained under t e previous section
"Operation wit D12 - Controller settings".
T e settings MON and 160 Hz are not available wit t e E-PAC.
Operation with P1200A
C6
CUT
GRISP
MUTE
OVL
-12 dB
-6 +6
0
MON
160Hz
Controls on C6
controller module
Up to two C6/C690 cabinets can be driven by eac P1200A power
amplifier c annel fitted wit a C6 controller module.
Fitting one C6 and one subwoofer controller module allows a single
mainframe to drive two C6/C690 and two active subwoofer
cabinets. All cabinets can be linked toget er locally and fed by a
single 4-wire cable from eit er mainframe output connector.
T e CUT, MON and 160 Hz settings are available. T e
c aracteristics of t e CUT setting is explained under t e previous
section "Operation wit D12 - Controller settings".
MO switch and indicator
If t e MON switc is selected t e low frequency level is reduced by
3 dB. T is setting reduces t e low frequency energy gained from
t e coupling effect of floor placement.
160 Hz setting (CUT and MO switches both selected)
If t e 160 Hz mode is selected, a ig pass filter is inserted in t e
controller signal pat . T e crossover frequency of 160 Hz is ig er
t an in CUT mode and t us increases t e available eadroom in
t e C6/C690. T e 160 Hz setting can be selected w en t e C6/
C690 is operated wit a d&b subwoofer.
Dispersion characteristics
T e diagrams below s ow dispersion angle vs frequency plotted
using lines of equal sound pressure (isobars) at –6 dB and –12 dB.
T e nominal 60
° orizontal dispersion is maintained from 20 kHz
down to 2 kHz.
C6 isobar diagrams

C6/C690 Manual (3.0E) Page 7 of 8
Technical specifications
C6 (C690) system data
Frequency response (–5 dB)......................................................................70 Hz - 17 kHz
Max. sound pressure (1 m, free field) wit D12........................................134 (133) dB
Max. sound pressure (1 m, free field) wit E-PAC ...................................131 (130) dB
Max. sound pressure (1 m, free field) wit P1200A.................................133 (132) dB
(SPLmax peak, pink noise test signal wit crest factor of 4)
Input level (100 dB SPL / 1 m).................................................................... –14 (–13) dBu
Polarity to controller INPUT (XLR pin 2: + / 3: –) ...................................LF: + / HF: –
C6 (C690) loudspeaker
Nominal impedance................................................................................................... 8 o ms
Power andling capacity (RMS / peak 10 ms)........................................ 200 / 800 W
Nominal dispersion angle ( or. x vert.) .......................................60
° x 40 ° (90 ° x 50 ° )
Connections ..................................................................................................................2 x EP5
Pin assignments ...................................................................................................................1/2
optional.........................................................................................................................2 x NL4
Pin assignments .......................................................................................................... 1+ / 1–
Weig t .................................................................................................................28 kg (62 lb)
-5
0
5
10
-10
-15
-20
-25
-30
20 100 1k 10k 20k
STANDARD
CUT
160 Hz
C6 frequency response, standard, CUT and 160 Hz switch settings
C6/C690 wiring diagram
C6/C690 cabinet dimensions in mm [inch]

C6/C690 Manual (3.0E) Page 8 of 8
d&b audiotechnik AG, Eugen-Adolff-Str. 134, D-71522 Backnang, Germany, Phone [phone], Fax [phone]
EU declaration of conformity (CE symbol)
EU conformity of loudspeakers
T is declaration applies to loudspeakers manufactured by d&b
audiotec nik AG and includes t e types listed in t e table below:
− C6/C690 Z2252
All production versions of t ese types are included, provided t ey
correspond to t e original tec nical version and ave not been
subject to any later design or electromec anical modifications.
We herewith declare that said products are in
conformity with the provisions of the following EC
directives including all applicable amendments:
− 89/336 Electromagnetic Compatibility
The following standards have been applied:
− DI E 55013:08-1991
− DI E 55020:05-1995
− DI E 50082-1:03-1993