d&b 27S-SUB User Manual

Download

27S-SUB/27A-SUB Manual (1.2 EN)

General information

27S-SUB/27A-SUB Manual

Version: 1.2 EN, 12/2011, D2614.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.

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. 27S-SUB/27A-SUB loudspeaker............................... 5

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

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

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

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

2.4. Technical specifications............................................... 8

3. Manufacturer's Declarations...................................... 9

3.1. EU conformity of loudspeakers (CE symbol)............. 9

3.2. WEEE Declaration (Disposal)..................................... 9

d&b 27S-SUB/27A-SUB Manual (1.2 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.

d&b 27S-SUB/27A-SUB Manual (1.2 EN)4

2. 27S-SUB/27A-SUB loudspeaker

2.1. Product description

The 27S-SUB and 27A-SUB are compact high performance cardioid subwoofers for use with d&b xS-Series and xA-Series loudspeakers. The cabinets house two long excursion neodymium drivers in an integrated cardioid setup: a 15“ driver in a bassreflex design facing to the front and a 12” driver in a two chamber bandpass design radiating to the rear. The arrangement and tuning provide a cardioid dispersion pattern using a single amplifier channel.

The 27A-SUB incorporates the same acoustic components as the 27S-SUB, however, the cabinet is equipped with an integrated rigging system for the design of vertical arrays. The 27A-SUB can be combined with 10A and 10AL loudspeakers.

The frequency response extends from 40 Hz to 140/100 Hz.

The enclosures are constructed from marine plywood with an impact resistant black paint finish. The fronts of the cabinets are protected by a rigid metal grill backed by an acoustically transparent foam. The 27S-SUB is equipped with four rubber feet to prevent cabinet movement and protect the bottom panel against scratching.

Fig. 1: 27S-SUB/27A-SUB loudspeaker Rigging examples:

27S-SUB ceiling mounted with Z5410 Horizontal bracket 18S/27S. 10AL/27A-SUB array.

Fig. 2: Cardioid dispersion pattern

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

Cardioid dispersion

Cardioid dispersion avoids unwanted energy behind the system and greatly reduces the reverberant field at low frequencies providing highest accuracy in low frequency reproduction. 27S and 27A subwoofers can be used as stand-alone systems or in stacked or flown combinations with a minimum distance of 60 cm (2 ft) between adjacent cabinets or to side walls. When set up in front of walls, the minimum distance from the cabinet rear panel to the wall is 15 cm (0.5 ft).

27S-SUB rigging components

The 27S-SUB side panels are each equipped with a pair of M10 threads to accept the Z5410 Horizontal bracket 18S/27S. The threaded inserts are covered by dummy caps in cabinet color. The caps must be removed before mounting any accessories.

27A-SUB rigging components

27A-SUB cabinets are connected to form a vertical array each using the Z5418 Connector plates xA-SUB. Up to four 27A-SUB cabinets can be connected. When integrated at the top of a 10A or 10AL array, up to two 27A-SUB cabinets can be combined with up to six 10A/10AL cabinets.

d&b 27S-SUB/27A-SUB Manual (1.2 EN) 5

Vertical arrays are supported using the Z5414 Flying bar xA and the Z5413 Flying bar connector plates xA. For approved configurations as well as safety and mounting instructions, refer to the respective rigging manual.

Cabinet options

The weather resistant version (WR) is suitable for outdoor use (IP34, vertical aiming up to 0°). The cabinets have an impact and weather protected black PCP (Polyurea Cabinet Protection) finish.

2.2. Connections

The cabinets are fitted with a pair of NL4 connectors and a two pole screw terminal block (ST). All four pins of both NL4 connectors are wired in parallel. The cabinets use the pin assignments 2+/2–. Pins 1+/1– are designated to full range cabinets.

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).

Fig. 3: Connector wiring

Fig. 4: Cover plate and rubber grommet

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

NL4

1+ 1– 2+ 2–

n.a. n.a. + –

n.a. n.a. Brown (+) Blue (–)

Fixed cable connection

The 27S-SUB and 27A-SUB loudspeakers are each supplied with a cover plate [1] and a rubber grommet feed through [2]. For indoor operation, these items can be used to hide the connector panel, if required. For unprotected outdoor operation, the connector panel must be covered, i.e. both items must be used to achieve an IP degree of protection of IP34.

To install the fixed cable connection, proceed as follows:

Tools required: Philips screw driver (#PH2).

1. Prepare the rubber grommet and the connection cable.

2. Remove the knockout opening in the cover plate and attach the rubber grommet correspondingly.

3. Insert the connection cable through the rubber grommet and connect the cable wires to the screw terminal. Þ Observe the correct polarity!

4. Undo the four screws of the connector panel.

5. Push the cover plate towards the connector panel until it fits into place.

6. Finally fix the cover plate together with the connector panel using the four screws.

d&b 27S-SUB/27A-SUB Manual (1.2 EN)6

Fig. 5: Installing the fixed cable connection

NL4 connection with cover plate

The two NL4 connector sockets of the cabinet's connector panel are located in a recess to allow the use of the cover plate [1] together with NL4 cable connectors, as shown in the graphic opposite.

Fig. 6: NL4 cable connection with cover plate [1]

Note: Neutrik NL4FC type connectors must be used for this

option.

The cover plate is equipped with two knockout openings to allow daisy chaining of the loudspeaker.

To use the NL4 connection, proceed in the same manner as described above in the section entitled Þ "Fixed cable connection" on page 6.

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.

Operation with D6 or D12

Select the controller setup 27S-SUB for 27S or 27A subwoofers.

Within the D12 amplifier it is available in "Dual Channel" and "Mix TOP/SUB" mode. For combinations with full range systems fed by a single 4-wire cable "Mix TOP/SUB" mode must be selected.

Up to a total of two 27S-SUB or 27A-SUB loudspeakers can be driven by each channel of the D6 or D12 amplifiers.

2.3.1. Controller settings

For acoustic adjustment the 100 Hz function can be selected.

100 Hz circuit

If the 100 Hz circuit is selected, the upper operating frequency of the system is reduced from 140 Hz to 100 Hz.

d&b 27S-SUB/27A-SUB Manual (1.2 EN) 7

Fig. 7: 27S-SUB/27A-SUB frequency response, standard and 100 Hz mode

2.4. Technical specifications

27S-SUB/27A-SUB system data

Frequency response (–5 dB standard) Frequency response (–5 dB 100 Hz mode) 40 Hz - 100 Hz Max. sound pressure (single cabinet, 1 m, free field) with D6 128 dB with D12 131 dB

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

40 Hz - 140 Hz

27S-SUB/27A-SUB loudspeaker

Nominal impedance Power handling capacity (RMS/peak 10 ms) 500/2000 W Components 1 x 15“ driver

Connections 2 x NL4

1 x screw terminal (ST - up to 4 mm2/AWG 11)

Optional fixed cable (PG):

H07-RN-F, 2 x 2.5 mm2 (AWG 13), 5.5 m (18 ft)

Pin assignment NL4: 2+/2–

Fixed cable (PG): brown + / blue –

Weight 41 kg (90 lb)

6 ohms

1 x 12“ driver

Fig. 8: 27S-SUB cabinet dimensions in mm [inch]

Fig. 9: 27A-SUB cabinet dimensions in mm [inch]

d&b 27S-SUB/27A-SUB Manual (1.2 EN)8

3. Manufacturer's Declarations

3.1. EU conformity of loudspeakers (CE symbol)

This declaration applies to:

d&b 27S-SUB loudspeaker, Z1580

d&b 27A-SUB loudspeaker, Z1581

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.

3.2. 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.

d&b 27S-SUB/27A-SUB Manual (1.2 EN) 9

www.dbaudio.com