d&b audiotechnik 44S User manual

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44S

Manual 1.1 en

General information

44S Manual

Version: 1.1 en, 09/2020, D2632.EN .01

Keep this document with the product or in a safe place so that it is available for future reference.

When reselling this product, hand over this document to the new owner.

d&b audiotechnik GmbH & Co. KG Eugen-Adolff-Str. 134, D-71522 Backnang, Germany T +49-7191-9669-0, F +49-7191-95 00 00 docadmin@dbaudio.com, www.dbaudio.com

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

2 44S loudspeaker.................................................................. 5

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

2.2 Connections................................................................................ 6

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

3.2 WEEE Declaration (Disposal).................................................. 12

d&b 44S Manual 1.1 en 3

1 Safety precautions

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.

d&b 44S Manual 1.1 en4

2 44S loudspeaker

2.1 Product description

The 44S is a passive 2-way design housing two 4.5” neodymium LF drivers built into a bass-reflex design and two 1.25" HF dome tweeters mounted on a rotatable CD horn thus providing rotatable dispersion characteristics (h x v) of 90° x 30° and 30° x 90° respectively. The frequency response extends from 90 Hz to 17 kHz. The loudspeaker can be used as a stand-alone system or supplemented by actively driven d&b subwoofers.

The 44S is a highly directive ultra compact loudspeaker with an asymmetric cabinet shape. In horizontal orientation, the 44S can be used as a frontfill loudspeaker.

The enclosure is injection molded with an impact resistant paint finish. The front of the cabinet is protected by a rigid metal grill. Two M8 threaded inserts are incorporated in the back panel to connect to different rigging accessories.

Different brackets enable mounting to walls, under ceilings or balconies or any other suitable surfaces such as floors as a single unit (Z5423/Z5424) or in closely coupled clusters of two cabinets (Z5423 with Z5425). Using the swivel bracket (Z5426), it can be used as a main or fill system, flown or mounted on a high stand.

The optional d&b Z5427.501 44S Backbox is a solution for flush mounting the loudspeaker into ceilings or walls, either in horizontal or vertical position. The back box is just 140 mm high making it an ideal solution for in-stair mounting. Within the back box, the loudspeaker can be aligned by 20° in 5° increments.

Note: Please also refer to Þ Chapter2.5 "Technical specifications" Þ "Flush mounting" on page11, as well as to the Z5427.501 Mounting instructions which are supplied with the 44S Backbox.

d&b 44S Manual 1.1 en 5

Rigging examples

Z1650 44S loudspeaker with: Z5423 Mounting bracket 44S Z5425 Cluster bracket 44S

Z1650 44S loudspeaker with: Z5424 L-mount adapter 44S

Note: Please refer to the respective mounting instructions.

Z1650 44S loudspeaker with: Z5426 Swivel bracket 44S

Z1650.500 44S loudspeaker, Flushmount with: Z5427.501 44S Backbox Z5428.501 44S Backbox grill

2.2 Connections

The cabinet is fitted with a pair of NL4 M connectors and a 4-pin Phoenix Euroblock terminal block (cross-section up to 4 mm2/ AWG 11 - A corresponding 2-pin Phoenix plug is enclosed with the cabinet).

All four pins of both NL4 M connectors are wired in parallel. The cabinet uses the pin assignment 1+/1–. Pins 2+/2– are designated to actively driven subwoofers.

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

Phoenix

1: + 2: – 3: + 4: –

NL4 M 1+ 1– 2+ 2–

Connector wiring

d&b 44S Manual 1.1 en6

2.3 Operation

-5

0

5

10

-10

-15

-20

-25

-30 20

100 1k 10k

20k

NOTICE!

Only operate d&b loudspeakers with a correctly configured d&b amplifier, otherwise there is a risk of damaging the loudspeaker components and the system performance can not be achieved.

Applicable d&b amplifiers:

D6|D20|D80|10D|30D|40D

Amplifier output mode(s): Dual Channel or Mix TOP/SUB

Application Setup Cabinets per

amplifier channel

44S 44S 4

2.3.1 Controller settings

For acoustic adjustment the functions CUT, HFA and CPL can be selected.

CUT mode

Set to CUT, the cabinet low frequency level is reduced. The cabinet is now configured for use with applicable, actively driven d&b subwoofers.

HFA mode

In HFA mode (High Frequency Attenuation), the HF response of the system is rolled off. HFA provides a natural, balanced frequency response when a unit is placed close to listeners in near field or delay use.

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.

Frequency response correction in HFA mode* *schematic diagram

CPL function

The CPL (Coupling) function compensates for the different acoustic properties depending on whether the loudspeaker is freely positioned or flush-mounted.

At attenuation values of up to –5, CPL begins gradually around 1 kHz and reaches the maximum attenuation below 200 Hz. At higher values of up to –9, the filter corner frequency gradually shifts to higher frequencies while an attenuation of 5 dB is maintained.

Positive CPL values create an adjustable low frequency boost (0 to +5 dB) at around 90 Hz and can be set when the system is used in

Frequency response correction of the CPL function* *schematic diagram

d&b 44S Manual 1.1 en 7

full range mode without subwoofers.

2.4 Dispersion characteristics

The following graphs show dispersion angle over frequency of a single cabinet plotted using lines of equal sound pressure (isobars) at –6 dB and –12 dB.

44S Isobar diagram horizontal

44S Isobar diagram vertical

d&b 44S Manual 1.1 en8

Altering the HF horn dispersion

The HF horn can be rotated through 90° to allow an HF dispersion (h x v) of either 90° x 30° or 30° x 90°.

To rotate the HF horn, proceed as follows:

Tools required: Allen hex key 2.5 mm.

1. Place the cabinet on its back panel.

2. Depending on the cabinet variant, first undo the four Allen hex screws holding the front grill and remove the front grill.

3. Undo the four Allen hex screws of the HF horn.

4. Carefully pull out the HF horn and turn it clockwise by 90°.

5. Refit the horn as follows:

1. Make sure the gasket [G] is seated properly.

2. Refit the horn and tighten the screws with a maximum

torque of 2 N×m.

6. Recheck your work and refit the front grill.

d&b 44S Manual 1.1 en 9

44S frequency response, standard and CUT modes

2.5 Technical specifications

System data

Frequency response (–5 dB standard) 90 Hz - 17 kHz Frequency response (–5 dB CUT mode) 150 Hz - 17 kHz Max. sound pressure (1 m, free field) with D80|D20|30D|40D 123 dB with D6|10D 121 dB

(SPLmax peak, pink noise test signal with crest factor of 4)

Loudspeaker data

Nominal impedance 16 ohms Power handling capacity (RMS/peak 10 ms) 150/500 W Dispersion angle (h x v) 90° x 30° Components 2 x 4.5“ driver with neodymium magnet

2 x 1.25“ dome tweeter mounted on CD horn

Passive crossover network Connections 4-pin Phoenix Euroblock and 2 x NL4 M Pin assignment Phoenix: 1: + / 2: – / 3: + / 4: –

NL4 M: 1+/1– Weight loudspeaker 3.6 kg (8 lb) Dead weight Backbox 2.6 kg (5.7 lb) Weight loudspeaker with Backbox 6.2 kg (13.7 lb)

44S cabinet dimensions in mm [inch]

d&b 44S Manual 1.1 en10

Flush mounting



Z5427.501 44S Backbox front view, dimensions in mm [inch]

Z5428.501 44S Backbox side view and max. wall thickness, dimensions in mm [inch]

Z5427.501 44S Backbox cut out dimensions in mm [inch]

Z5428.501 44S Backbox grill (cover grill), dimensions in mm [inch]

Note: Please also refer to the Z5427.501 Mounting instructions, which are supplied with the 44S Backbox

d&b 44S Manual 1.1 en 11

3 Manufacturer's declarations

3.1 EU conformity of loudspeakers (CE symbol)

This declaration applies to:

d&b Z1650 44S loudspeaker

manufactured by d&b audiotechnik GmbH & Co. KG.

All product variants 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.

3.2 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.

WEEE-Reg.-Nr. DE: 13421928

d&b 44S Manual 1.1 en12

www.dbaudio.com