d&b Y8 User Manual

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Y8/Y12

Manual 1.1 en

General information

Y8/Y12 Manual

Version: 1.1 en, 08/2014, D2712.EN .01

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 +49-7191-9669-0, F +49-7191-95 00 00 docadmin@dbaudio.com, www.dbaudio.com

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

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

2. Y8/Y12 loudspeaker..................................................... 5

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

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

2.3. Operation.................................................................... 6

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

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

2.5. Technical specifications............................................... 9

3. Manufacturer's declarations.................................... 10

3.1.

EU conformity of loudspeakers (CE symbol)........... 10

3.1.1. WEEE Declaration (Disposal)............................... 10

d&b Y8/Y12 Manual 1.1 en 3

1. Safety precautions

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.

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2. Y8/Y12 loudspeaker

2.1. Product description

The Y8 line array module is intended for small to medium scale sound reinforcement applications. When the Y Flying frame is used, up to 24 cabinets can be flown in vertical columns producing a constant directivity dispersion pattern of 80° in the horizontal plane.

The Y12 line array module is acoustically and mechanically compatible with the Y8 providing a 120° horizontal dispersion.

The Y8/Y12 cabinets are passive 2-way designs, both housing 2 x 8" neodymium LF drivers, one 1.4" exit HF compression driver with a 3" diaphragm mounted to a dedicated wave shaping device and a passive crossover network.

The wave segments of each cabinet couple without gaps and sum up coherently. Splay angles between adjacent cabinets can be set in the range from 0° to 14° with a 1° resolution.

The two LF drivers are positioned in a dipolar arrangement providing an exceptional dispersion control even at lower frequencies with the nominal horizontal dispersion angle being maintained down to 500 Hz.

The frequency response extends from 54 Hz to above 19 kHz.

The cabinets are constructed from marine plywood and have an impact and weather protected PCP (Polyurea Cabinet Protection) finish. The fronts of the cabinets are protected by a rigid metal grill backed by an acoustically transparent foam. Each side panel incorporates a handle while two additional recessed grips are provided at the rear.

Y-Series rigging components and arrays

Y-Series arrays may consist of a combination of Y8 or Y12 loudspeakers and/or Y-SUB cardioid subwoofers.

Cabinets are mechanically connected using the rigging strands on both sides of the cabinet front and a central strand at the rear of the cabinet. All necessary rigging components are mounted to the cabinet and fold out or slide out when needed.

A detailed description of the Y-Series rigging components is given in the Y-Series Rigging manual which is provided with the Y Flying frame.

A detailed description of planning and designing Y arrays is given in the technical information "TI 385 d&b Line array design, d&b ArrayCalc" which is also provided with the Y Flying frame.

The d&b ArrayCalc simulation software can be downloaded from the d&b website at

www.dbaudio.com.

d&b Y8/Y12 Manual 1.1 en 5

passive

crossover

2.2. Connections

The cabinets are fitted with a pair of NLT4 F/M connectors. All four pins of both connectors are wired in parallel. The Y8 and Y12 loudspeakers use the pin assignments 1+/1–. Pins 2+/2– are designated to actively driven subwoofers. Using the male connector as the input, the female connector allows for direct connection to a second cabinet.

The cabinets can be supplied with NL4 M or EP5 connectors as an option.

Connector wiring

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

NLT4 F/M

NL4 M

1+ 1– 2+ 2– n.a.

EP5 1 2 3 4 5

2.3. Operation

NOTICE!

Only operate d&b loudspeakers with a correctly configured d&b amplifier, otherwise there is a risk of damaging the loudspeaker components.

The applicable amplifiers provide two setups ("Arc" or "Line") for the Y8 and Y12 loudspeakers. These are available in Dual Channel or Mix TOP/SUB mode.

Selecting the respective Y8 or Y12 setup enables up to two Y8 or Y12 cabinets to be driven by the respective amplifier channel.

Arc and Line setups

The selection of Arc or Line depends on the curvature of the array. Both setups may be used within one array.

The Arc setup is intended for line array loudspeakers when used in curved array sections.

The Line setup is used for long throw array sections with three or more consecutive splay settings of 0°, 1° or 2°. Compared to the Arc setup, the mid/high range is reduced to compensate for the extended nearfield.

The transition from Line to Arc configuration within the array is made according to the splay progression but may allow for certain deviations due to the wiring of the cabinets in groups of up to two.

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2.3.1. Controller settings

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

CUT circuit

Set to CUT, the low frequency level of the cabinets is reduced. The Y8/Y12 array is now configured for use with the d&b Y-SUB or J-SUB subwoofers.

CPL circuit

The CPL (Coupling) circuit compensates for coupling effects between the cabinets of an array. CPL begins gradually around 2 kHz, with the maximum attenuation below 100 Hz. As coupling effects increase with the length of the line array, the CPL circuit can be set to dB attenuation values between 0 and –9. With higher attenuation values the corner frequency of the filter shifts towards lower values.

Positive CPL values create an adjustable low frequency boost (0 to +5 dB) and can be set when the system is used in full range mode without subwoofers.

Frequency response correction of CPL circuit

Frequency response correction of HFC circuit

Note: Make sure that all cabinets within the line array are

operated with the same CPL setting.

HFC circuit

Selecting the HFC (High Frequency Compensation) circuit compensates for the loss of high frequency energy due to air absorption when loudspeakers are used to cover far field listening positions.

The HFC circuit has two settings (HFC1 and HFC2) for different distances the cabinets need to cover. The settings should be used selectively; HFC1 for cabinets covering distances larger than 25 m (82 ft) and HFC2 for those covering distances larger than 50 m (164 ft).

The compensation is adjusted for a typical relative humidity of 40 %. With lower humidity the absorption by air increases therefore the distances where the respective HFC setting provides a correct equalization are shorter than indicated above.

Using the HFC function provides the correct sound balance between close and remote audience areas, whilst all amplifiers driving the array can be fed with the same signal.

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2.4. Dispersion characteristics

The graphs below show the horizontal dispersion angle over frequency plotted using lines of equal sound pressure (isobars) at –6 dB and –12 dB. The nominal dispersion is maintained above 600 Hz, while a useful horizontal dispersion control is achieved down to 500 Hz.

Isobar diagram Y8 horizontal

Isobar diagram Y12 horizontal

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Y8 frequency response, standard and CUT modes

Y12 frequency response, standard and CUT modes

2.5. Technical specifications Y8/Y12 system data

Frequency response (–5 dB standard) 54 Hz - 19 kHz Frequency response (–5 dB CUT mode) 100 Hz - 19 kHz Max. sound pressure (1 m, free field) Y8 with D80/D12/D6 139 dB/137 dB/134 dB Y12 with D80/D12/D6 139 dB/137 dB/134 dB

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

Y8/Y12 loudspeaker

Nominal impedance Power handling capacity (RMS/peak 10 ms) 400/1600 W Nominal dispersion angle (horizontal) Y8 80° Nominal dispersion angle (horizontal) Y12 120° Splay angle setting 0° ...14°

Components 2 x 8“ driver

1 x 1.4” exit compression driver

Passive crossover network

Connections 2 x NLT4 F/M

optional 2 x NL4 M or EP5

Pin assignment NLT4 F/M and NL4 M: 1+/1–

Weight 20 kg (44 lb)

8 ohms

1° increment

EP5: 1: + / 2: –

Y8/Y12 cabinet dimensions in mm [inch]

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3. Manufacturer's declarations

3.1. EU conformity of loudspeakers (CE symbol)

This declaration applies to:

d&b Y8 loudspeaker, Z0707

d&b Y12 loudspeaker, Z0708

manufactured by d&b audiotechnik GmbH.

All production versions of these types 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.

3.1.1. 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.

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www.dbaudio.com