d&b audiotechnik xC 24C-E, XC 24C User Manual

24C / 24C-E
Manual 1.1 en

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General information

24C / 24C-E Manual

Version: 1.1 en, 02/2014, D2618.EN .01

Copyright © 2014 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
T [phone], F [phone]
[e-mail], www.dbaudio.com

1. Safety precautions......................................................... 4

1.1. Information regarding the use of loudspeakers......... 4

2. 24C / 24C-E cardioid column loudspeaker........... 5

2.1. Product description...................................................... 5

2.1.1. 24C cardioid column loudspeaker......................... 5

2.1.2. 24C-E cardioid column extender............................ 5

2.1.3. Cardioid dispersion................................................. 6

2.1.4. Dispersion characteristics........................................ 7

2.1.5. Directivity index (Di)................................................ 7

2.1.6. Aiming of the beam................................................. 8

2.2. Connections................................................................. 9

2.3. Operation.................................................................... 9

2.3.1. Controller settings.................................................. 10

2.4. Technical specifications............................................ 11

3. Attaching the 24C-E extender.................................. 13

4. Manufacturer's declarations.................................... 15

4.1.

EU conformity of loudspeakers (CE symbol)........... 15

4.2. WEEE Declaration (Disposal).................................. 15

Contents

d&b 24C / 24C-E Manual 1.1 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 24C / 24C-E Manual 1.1 en4

2.1. Product description

2.1.1. 24C cardioid column loudspeaker

The 24C is a passive 2-way column loudspeaker housing six 4”
neodymium drivers and an HF array comprising six 1.1” dome
tweeters.

The 4" drivers are arranged in a unique cardioid setup radiating
through waveguide elements at the front and damped ports at the
rear of the cabinet. This design provides a constant directivity
pattern of 90° in the horizontal plane with a broadbad attenuation
to the rear of an average of approx. 18 dB.

In the vertical plane, the beam produced by the low-mid drivers is
tilted downwards by –5° and provides significant directivity down
to 370 Hz.

The HF array has a nominal vertical dispersion of 20° and its main
axis can be adjusted continuously between 0° and –14° (when
using ArrayCalc adjustment in 1° increments).

The loudspeaker cabinets are based on an extruded aluminum
profile with a metal grill protecting the front of the loudspeaker.
Two continuous rails (8 mm T-slot profiles) are provided at the rear
for attaching a wall mount bracket.

2.1.2. 24C-E cardioid column extender

The 24C-E is a passive column extension to be attached directly to
the 24C. The cabinet houses six 4” neodymium drivers, providing
an extension of vertical directivity down by a further octave to
190 Hz.

The acoustic design is based on the same principles as the 24C,
thus offering the same cardioid dispersion pattern in the horizontal
plane. The extender is electrically connected through the 24C
without the need for an additional amplifier channel.

Note: The 24C-E loudspeaker is not intended to be operated
as a stand-alone system.

2. 24C / 24C-E cardioid column loudspeaker

d&b 24C / 24C-E Manual 1.1 en 5