d&b audiotechnik A1 Mainframe F-Series User Manual
  1. Manuals
  2. Brands
  3. d&b audiotechnik Manuals
  4. Music Equipment
  5. A1 Mainframe F-Series
  6. User manual
d&b audiotechnik A1 Mainframe F-Series User Manual

d&b audiotechnik A1 Mainframe F-Series User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
A1 Mainframe
.-Series, M2, M1220
User Manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the A1 Mainframe F-Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for d&b audiotechnik A1 Mainframe F-Series

Summary of Contents for d&b audiotechnik A1 Mainframe F-Series

  • Page 1 A1 Mainframe .-Series, M2, M1220 User Manual...
  • Page 2 References in the manual This refers potentially WARNING! dangerous situation which may lead to personal injury. This refers potentially CAUTION! dangerous situation which may lead damage equipment. This refers to a situation which IMPORTANT! may cause the equipment to malfunction. Symbols on the equipment Please refer to the information in the operating manual.

  • Page 3: Safety Precautions

    Safety precautions Before you use our products, read the manual carefully and observe all the safety precautions. They will protect you and help to avoid equipment failures. Keep this manual in a safe place so that it is available for future reference. If you supply d&b products, please draw the attention your...
  • Page 4 Only carry out work specified in this manual and always disconnect WARNING! the mains power supply. All other work should be performed by trained service staff, especially in the following cases: - Mains power cable or plug has been damaged - Objects or liquids have entered the unit - The unit is not operating normally - The unit was dropped or the housing is damaged...
  • Page 5 Only use loudspeakers in the .-Series and the M2 and M1220 CAUTION! monitors with the A1 mainframe fitted with the correct controller modules. The contoller monitors cone excursion and voice coil temperature of the drivers. When loudspeakers are operated without the correct controller, in addition to losses in tone, there is a risk of damage to the components.
  • Page 6 Configuration switches Displays and controls These switches depend on the of mainframe These elements are described in type of loudspeaker. They are described individually for each system the section "A1 mainframe". in the section "Loudspeakers". 1220-CO OV HI L FC OV LO TEMP GR HI...

  • Page 7: Table Of Contents

    Contents Safety precautions Introduction ........... 1-1 1.1. System concept................. 1-1 1.2. d&b active systems design............1-2 1.3. Block diagram ................1-2 A1 mainframe ..........2-1 2.1. .eatures..................2-1 2.1.1. A1 power amplifiers ..............2-1 2.1.2. SenseDrive ................2-1 2.1.3. SpeakerID ................. 2-2 2.1.4.

  • Page 9: Introduction

    1. Introduction This user manual describes the facilities, functions and operation of d&b active controller loudspeaker systems and covers the operati- on of the A1 mainframe, controller modules and loudspeakers used in these systems. d&b publishes additional application and technical information not- es (TI).

  • Page 10: D&B Active Systems Design

    1.2. d&b active systems design Their are two types of d&b active loudspeaker system - active sub- woofers and full range, 2 way, active loudspeakers. Each type of active system is driven by an A1 mainframe fitted with a single, loudspeaker specific controller module.

  • Page 11: A1 Mainframe

    2. A1 mainframe The A1 mainframe is housed in a 3 rack unit high, 353 mm (13.9") deep, 19" rack mount enclosure. The A1 is designed to accept a sin- gle d&b active system controller module and includes power supplies, separate L.

  • Page 12: Speakerid

    2.1.3. SpeakerID A built-in SpeakerID circuit ensures that signal can only be connec- ted to a loudspeaker if it matches the controller module fitted to the mainframe. When the SpeakerID circuit senses that the correct loudspeaker is connected to the mainframe output then the internal power amplifier outputs are fed to the mainframe speaker output connector(s) and the green ID LED on the controller module front panel illuminates.

  • Page 13: Mains Overvoltage Protection

    2.1.5. Mains overvoltage protection To protect against mains overvoltage damage the A1 is fitted with FUSE T2A FAIL an efficient, self-resetting mains overvoltage protection circuit. As soon as the mains supply voltage exceeds 265 V (115 V for the FUSE T8A FAIL 100 V supply version) the overvoltage protection circuit responds and isolates the mainframe power supply from the mains supply...
  • Page 14 Remote operation using the d&b Remote Interface Bridge (RIB) The d&b RIB is housed in a 1 RU high, 19“ rack mount enclosure. Combinations of 1 to 12 mainframes (A1 or P1200A) up to 500 m away can be directly connected to a RIB I/O port by a twin wire bi-directional serial link.

  • Page 15: A1 Controls & Indicators

    2.2. A1 controls & indicators PWR - Power (green) On. when the mainframe is connected to the mains supply, swit- − ched on and ready for use. TEMP Off. The mainframe is not connected to or powered from the − PROT mains supply.

  • Page 16: Connections

    2.3. Connections INPUT INPUT and INPUT LINK The mainframe has a 3 pin XLR female input connector. Beneath and wired in parallel is a 3 pin male XLR connector to provide an input link - sometimes called a ‘pass-through’ connector - used to feed the input of the next device in the system signal chain.

  • Page 17: Mainframe Installation

    2.4. Mainframe installation P1200A mainframe enclosures are designed to fit a standard 19" equipment rack or cabinet. The front panel vent slot serves as a useful handle for lifting and moving mainframes in and out of racks. The front panel switches are flush-fitted and the level control(s) and mainframe power switch are recessed to protect them from accidental damage and unintentional adjustment.

  • Page 18: Power Consumption And Power Loss

    2.5. Power consumption and power loss Signal loss waveform The power required from the mains supply and the waste heat produced by the amplifiers power loss are variable figures Square wave 2150 2900 depending on the load impedance and the signal levels and characteristics (e.g.

  • Page 19: Technical Specifications

    2.6. Technical specifications Nominal output power..........700 / 200 watts - 8 ohms (THD+N < 0.1%, both channels driven)......1200 / 350 watts - 4 ohms .requency response (–1 dB) ............. 20 Hz - 50 Hz measured at rated output power, both channels driven Harmonic distortion (THD+N)..........

  • Page 21: Controller Modules

    3. Controller modules The different controller modules include all the signal processing electronics, front panel controls and indicators needed to control and operate a specific matching active loudspeaker system. Shown opposite is the 1220-CO used with the .1220 and M1220 loud- speakers.

  • Page 22: Controls & Indicators

    drivers in the .1220 and .2 speaker cabinets. Each signal path, .2-CO high & low, uses equalisers and limiters specifically adjusted to the electroaccoustic requirements of the different speaker designs. OV HI H. Level setting As well as an overall level control, both active system controllers, OV LO 1220 and .2, provide a front panel H.

  • Page 23: Level Control

    MUTE (red) This switch mutes the system output without having to alter any of the system level settings. The mute circuit acts by electronically disconnecting the mainframe power amplifier output. The red LED next to the MUTE switch illuminates to verify that the switch has been selected.

  • Page 25: Connections

    4. Loudspeakers d&b active systems consist of full range speaker cabinets fitted with separate high and low frequency drivers and actively driven by an A1 mainframe. A full range active system may be supplemented with additional active subwoofer systems. All of the full range cabinets feature CD dispersion. CD stands for ‘Constant Directivity’...
  • Page 26 A1 User Manual...

  • Page 27: Data Sheets For The Loudspeakers

    4.2. Data sheets for the loudspeakers On the following pages you will find data sheets for the d&b loudspeakers which can be operated with the A1 mainframe. The data sheets contain information about the loudspeakers and operation with their respective A1 controller settings. The following data sheets are a compilation of the individual data sheets for the d&b loudspeakers.
  • Page 29 .1220 The .1220 is a compact, actively driven, 2-way full-range loudspeaker which uses a 12" L. driver and 2" H. compression driver in an arrayable bass reflex cabinet. The H. driver is coupled to a 60° x 40° (h x v) constant directivity (CD) horn. The .1220 cabinet is constructed from marine plywood coated with an impact resistant paint.
  • Page 30 1220-CO - Controls & indicators Standard setting 1220-CO On the top left of the module front panel are three configuration OV HI switches. Yellow LEDs next to each switch illuminate when a switch is selected. With no configuration switches selected, the connected OV LO 1220 loudspeakers will operate as a main, front-of-house system GR HI...

  • Page 31: Dispersion Characteristics

    Dispersion characteristics The diagrams below show dispersion angle vs frequency plotted using lines of equal sound pressure (isobars) at -6 dB and -12 dB. The nominal 60° horizontal dispersion is maintained from 17 kHz down to 2 kHz. .1220 isobar diagram .1220 Data Sheet .1220...
  • Page 32 Technical specifications .1220 System data .requency response .1220 (–5 dB) ............60 Hz to 16 kHz Max. sound pressure (1 m)..................134 dB (SPLmax peak, test signal pink noise with crest factor 4) Input level for max. sound pressure..............+15 dBu Input level for 100 dB-SPL / 1 m................–13 dBu Polarity to controller INPUT (XLR pin 2: + / 3: –) ........L.: –...
  • Page 33 .1222 The .1222 is a compact, actively driven, 2-way full-range loudspeaker which uses a 12" L. driver and 2" H. compression driver in an arrayable bass reflex cabinet. The H. driver is coupled to a 60° x 40° (h x v) constant directivity (CD) horn. As an option the .1222 loudspeaker can be equipped with a 90°...
  • Page 34 1222 controller module switches 1222 Standard setting C U T With no configuration switches selected, the connected 1222 loud- H F C O V H I speakers will operate as a main, front-of-house system without subwoofer support. 1 2 2 0 O V L O CUT switch and indicator G R H I...
  • Page 35 Dispersion characteristics The diagrams below show dispersion angle vs frequency plotted using lines of equal sound pressure (isobars) at -6 dB and -12 dB. .1222 (60°x40°) isobar diagrams .1222 Data Sheet .1222...
  • Page 36 Technical specifications .1222 System data .requency response (–5 dB) ..............60 Hz to 16 kHz Max. sound pressure (1 m)..................134 dB (SPLmax peak, test signal pink noise with crest factor 4) Input level for max. sound pressure..............+18 dBu Input level for 100 dB-SPL / 1 m................–13 dBu Polarity to controller INPUT (XLR pin 2: + / 3: –) ........L.: –...
  • Page 37 M1220 The M1220 is a compact, actively driven, 2-way stage monitor which uses a 12" L. driver and 2" H. compression driver in an arrayable bass reflex cabinet. The H. driver is coupled to a 40° x 60°(h x v) constant directivity (CD) horn. Constructed from marine plywood coated with an impact resistant pain, the M1220 cabinet is fitted with recessed handles and a rigid steel grill with an acoustically transparent foam front.
  • Page 38 1220-CO Controls and indicators Standard setting 1220-CO On the top left of the module front panel are three configuration OV HI switches. Yellow LEDs next to each switch illuminate when a switch is selected. With no configuration switches selected, the connected OV LO 1220 loudspeakers will operate as a main, front-of-house system GR HI...
  • Page 39 Technical specifications M1220 System data .requency response M1220 (–5 dB, free field) .........70 Hz to 16 kHz .requency response M1220 (–5 dB, floor coupling) ......60 Hz to 16 kHz Max. sound pressure (1 m) ..................134 dB (SPLmax peak, test signal pink noise with crest factor 4) Input level for max.
  • Page 41 The M2 is a high performance 2-way active monitor system using two 12" L. drivers in an airflow-optimised bass-reflex cabinet. It contains a 1.4" H. driver using a compact but extremely strong neodymium magnet assembly, mounted on a low distortion horn optimized for monitor applications.
  • Page 42 M2-CO Controls and indicators CUT switch and indicator Set to CUT, a high pass filter with a 110 Hz cut-off frequency is inserted in the controller signal path. The yellow CUT LED illuminates. M2 is now configured for use with d&b C7-SUB active subwoofer.
  • Page 43 Dispersion characteristics The diagram below shows dispersion angle v. frequency plotted using lines of equal sound pressure (isobars) at –6 dB and –12 dB. The nominal 45° horizontal dispersion angle is maintained from 800 Hz to 10 kHz. M2 isobar diagram horizontal M2 isobar diagram vertical M2 Data sheet...
  • Page 44 .requency response The graph below shows the frequency response of the M2 system in floor monitor position, measured in a height of 1.7m (listening pos. in monitor operation) on axis: M2 frequency response, monitor operation Technical specifications M2 system data .requency response (–5 dB, free field) ..........56 Hz –...
  • Page 45 The .2 is an actively driven, 2-way full-range loudspeaker which uses a pair of 12" L./mid range drivers and a 2" H. compression driver in a horn loaded cabinet. The H. driver is coupled to a 60° x 40° (h x v) constant directivity (CD) horn. The .2 cabinet is constructed from marine plywood coated with an impact resistant paint.
  • Page 46 .2-CO Controller module - Controls & indicators Standard setting .2-CO A single configuration switch (CUT) is located on the top left of the module front panel. A yellow LED next to the switch illuminates OV HI when it is selected. With the configuration switch not selected, the OV LO .2 system is configured for speech and vocal reproduction without GR HI...
  • Page 47 Technical specifications .2 System data .requency responce (–5 dB) ..............80 Hz to 16 kHz Max. sound pressure (1 m) ..................136 dB (SPLmax peak, test signal pink noise with crest factor 4) Input level for max. sound pressure..............+11 dBu Input level for 100 dB-SPL / 1 m ................
  • Page 49 B1-SUB The B1-SUB is an actively driven subwoofer which uses a pair of 15" L. drivers mounted in a bass reflex cabinet. The cabinet is constructed from marine plywood coated with an impact resistant paint. .itted to the cabinet sides are recessed handles and rigging stud plates.
  • Page 50 B1-SUB cabinet dimensions in mm [inch] d&b audiotechnik AG, Eugen-Adolff-Str. 134, D-71522 Backnang, Germany, Phone +49-7191-9669-0, .ax +49-7191-95 00 00...
  • Page 51 B2-SUB The B2-SUB is an actively driven subwoofer which uses a pair of 18" L. drivers mounted in a bandpass horn cabinet. The cabinet is constructed from marine plywood coated with an impact resistant paint. .itted each side of the cabinet sides are four recessed handles and, on the rear panel, four heavy duty wheels.
  • Page 52 Using the C4-OUT socket to drive C4-SUBs Although the C4-SUB operates very effectively down to 50 Hz 5 dB), in some applications the ability to reproduce frequencies C4 OUT INPUT – below this cut-off frequency can be an advantage. Using the B2 subwoofer, not only provides the desired L.
  • Page 53 Technical specifications B2-SUB system data (standard/IN.RA) .requency response (–5 dB)........ 37 Hz to 125 Hz / 32 Hz to. 68 Hz Max. sound pressure (1 m, full space) ..........139 dB / 136 dB (SPLmax peak, test signal pink noise with crest factor 4) Input level for max.

  • Page 55: System Operation

    5. System operation 5.1. Setting up/stacking the loudspeakers To get the best out of any high quality loudspeaker system it must be properly set up. Care and attention needs to be paid to the po- sition of the loudspeaker cabinets relative to each other and also to how they are angled and aimed towards the audience.

  • Page 56: Stacking Subwoofers

    stances (the distances between the sources in the array are so small that any combing effect would only occur at relatively high fre- quencies) than with how closely defined and controlled the driver dispersion patterns are. Once more, the design of the active sy- stems cabinets, in particular the use of CD horns, largely eliminates these problems and simplifies the creation of effective loudspeaker arrays - placing .1220 cabinets with their rear side panels butted...

  • Page 57: Wiring

    5.2. Wiring We recommend the use of good quality cables with a minimum 1.5 mm conductor size - 2.5 mm is preferable. d&b can supply MC8 CA-COM terminated cables (8 x 2.5 mm ) in various lengths. Especially for long cable runs, we recommend using d&b MC1220 cable.

  • Page 58: Level Setting For Mixed Systems

    5.3. Level setting for mixed systems A mixed system is one which uses a mixture of full range cabinets and subwoofers. If equal numbers of full range cabinets and sub- woofers are used then the correct balance and crossover frequen- cy between the full range and subwoofer systems is assured provi- ded the recommended controller module level settings are used.

  • Page 59: Troubleshooting

    6. Troubleshooting n o so u n d P O W E R sw itch o n ? tu rn P O W E R sw itc h o n P O W E R L E D fla sh in g o ff o ff ID L E D...

  • Page 61: Publications List

    7. Publications list A number of publications with supplementary information on our products are available. These publications are listed below along with their respective catalogue numbers. If you are interested in re- ceiving any of the listed publications then simply fill in the order form on the last page of the User Manual, send it to d&b and we will send you the requested information by return of post.

  • Page 63: Eu Declaration Of Conformity (Ce Symbol)

    8. EU declaration of conformity (CE symbol) EU conformity of loudspeakers This declaration applies to loudspeakers manufactured by d&b au- diotechnik AG and includes the types listed in the table below: Type Typ No. .1220 Z0051/Z0052 − .1222 Z0055 − M1220 Z0054 −...
  • Page 64 EU conformity of mainframes This declaration applies to the A1 mainframe manufactured by d&b audiotechnik AG consisting of the amplifier unit including the instal- led controller module. Type Type No. Z0070, version .10 and − higher Controller modules Z0080 - Z0085, all −...
  • Page 65 A1 User Manual (4.0 E) Insert this page into an envelope or fax machine and send it to: d&b audiotechnik AG Eugen-Adolff-Straße 134 D-71522 Backnang Germany .ax +49-7191-95 00 00 My address: Please send me the following information: Title Number I think the manual is informative yes, very I think the manual is well laid out...
  • Page 66 d&b audiotechnik AG, Eugen-Adolff-Str. 134, D-71522 Backnang, Germany, Phone +49-7191-9669-0, .ax +49-7191-95 00 00...

This manual is also suitable for:

M2M1220

Table of Contents