User manual

C3 Data Sheet C3
CAUTION!
MF+ MF- HF+ HF- n.c.
EP5 1 2 3 4 5
NL4 1+ 1– 2+ 2–
EP5 and NL4 pin assignments
C3
The C3 is the line array module for the d&b C4 system. The C3
cabinet houses 2 x 10" mid-range drivers and 3 x 1.3" HF
compression drivers, producing a maximum sound pressure level
greater than 143 dB SPL. The 2-way active C3 loudspeaker is an
entirely hornloaded design which unlike other “line arrays” can be
arrayed not only vertically but also horizontally, and by employing
the distinctive 15° angled rear side panels and rigging accessories of
the C4 cabinet it extends even further the scalability of the C4
system. Utilising an identical horizontal dispersion of 35° (above 900
Hz) and with a 5° vertical HF dispersion per cabinet, the C3 is used
to build vertical columns producing a curved coherent wave front.
This enables the C3 to address distances above 30 metres in
different ways: starting as an extension module for a C4 array
where additional mid and high range is required in the far field, up
to a full line array approach using C4-TOP cabinets as near field
supplements.
The C3 is designed for use with two or more cabinets in a vertical
column and the use of single cabinets is therefore not recommended.
The frequency response of two cabinets with a 5° vertical splay
angle extends from 130 Hz to above 16 kHz in standard mode.
With full range music program at high SPLs, additional subwoofers
are required. The LFC mode extends the response for speech
reproduction down to 80 Hz with reduced SPLmax. The C3 is
designed to be flown in columns, which should be horizontally
arrayed at 30° to each other. The vertical dispersion is designed for
coupling angles of 1° to 5°, two C3s using the standard 23 link load
chains (5° vertical splay) will give a vertical coverage of 10°.
Utilizing an identical cabinet shape and rigging accessories as the
C4, the C3 can be directly integrated into the C4 system.
The C3 cabinet is constructed from marine plywood, fitted with steel
handles, MAN CF4 stud plate rigging points and has an impact
resistant paint finish. The front of the mid-range section of the
loudspeaker cabinet is protected by a rigid metal grill fitted with a
replaceable acoustically transparent foam, and the HF section is
fitted with a foam block in the horn throat. Catches are fitted to the
top and bottom of the cabinet for securing an optional transport lid
E7908. Mounted on the rear panel are ratchet strap guide plates
(kelping bars), an EP5 or NL4 connector, two hinge plates, and four
heavy duty wheels.
Only operate C3 loudspeakers with a d&b P1200A mainframe fitted
with a C3 controller module otherwise there is a risk of damaging
the loudspeaker components.
Connections
The C3 cabinet can be fitted with either one EP5 male or one NL4
connector. Pin equivalents of EP5 and NL4 connectors are listed in
the table on the left.
The C3 cabinet is a 2-way active design employing both channels of
the P1200A power amplifier, fitted with the C3 controller module.
Up to two C3 loudspeakers can be driven with one mainframe. To
avoid HF loss with long cable runs each cabinet must be connected
to one of the mainframe outputs using separate cables.