d&b audiotechnik 24S, 24S-D User Manual

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24S/24S-D
Manual 1.1 en

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General information

24S/24S-D Manual

Version: 1.1 en, 10/2016, D2624.EN .01

Copyright © 2016 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
owner.

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. 24S/24S-D loudspeaker................................................ 5

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

2.2. Connections............................................................................. 5

2.3. Operation................................................................................ 7

2.3.1. Controller settings................................................................ 7

2.4. Dispersion characteristics........................................................ 8

2.5. Technical specifications........................................................ 10

3. Manufacturer's declarations..................................... 12

3.1.

EU conformity of loudspeakers (CE symbol)....................... 12

3.1.1. WEEE Declaration (Disposal)........................................... 12

Contents

d&b 24S/24S-D 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 24S/24S-D Manual 1.1 en4

2.1. Product description

The 24S and 24S-D are high performance 2-way loudspeakers
employing two 12" neodymium LF driver in a bass-reflex enclosure
and different HF sections for a wide range of installed sound
applications. Both models are lightweight passive designs using a

1.4" exit neodymium driver and large horns for accurate pattern
control. They provide rotatable dispersion characteristics of (h x v)
75° x 45° (24S) or 110° x 45° (24S-D).

The two 12" LF drivers are positioned in a dipolar arrangement
providing exceptional vertical dispersion control even at lower
frequencies.

Specially designed ports with optimized flow characteristics
provide a considerably improved, efficient low frequency
reproduction.

With a frequency response extending from 55 Hz to above
18 kHz, the cabinets can be used as full range systems or
supplemented by different subwoofers of the xS- or xA-Series.

The enclosures are constructed from marine plywood with an
impact resistant paint finish. The fronts of the cabinets are protected
by a rigid metal grill backed by an acoustically transparent foam.

The cabinets are Ball Impact Resistant according to DIN 18032-3.

Cabinet options

The weather resistant version (WR) is suitable for outdoor use
(IP34, vertical aiming up to +15°). The cabinets have an impact
and weather protected black PCP (Polyurea Cabinet Protection)
finish.

Rigging components

The top, bottom, side and rear panels of the cabinets are each
equipped with a pair of M10 threaded inserts to connect to
different rigging accessories such as:

– Z5553 Flying bracket 24S
– Z5554 Horizontal bracket 24S
– Z5384 VP Flying adapter
– Z5551 VP Flying adapter link

2.2. Connections

The cabinets are fitted with an NL4 M connector using the pin
assignment 1+/1– and a two pole screw terminal block (ST).

Cabinets with the weather resistant option (WR) are equipped with
a fixed input cable (PG type, H07-RN-F, 2 x 2.5 mm2 (AWG 13),
standard length 5.5 m (18 ft).

Pin equivalents of the applicable connector options are listed in the
table below.

NL4 M

1+ 1– 2+ (n.c.) 2– (n.c.)

ST + – n.a. n.a.

PG Brown (+) Blue (–) n.a. n.a.

24S/24S-D loudspeaker
Rigging examples:

24S/24S-D flown with Z5553 Flying bracket 24S.
24S/24S-D ceiling mounted with Z5554 Horizontal bracket 24S.
24S/24S-D array with Z5384 VP Flying adapter/Z5551 VP Flying adapter link.

passive

crossover

2. 24S/24S-D loudspeaker

d&b 24S/24S-D Manual 1.1 en 5