Dolby Laboratories DSR1260 Owner's Manual
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Dolby Laboratories DSR1260 Owner's Manual

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Dolby DSR1260/DSR1280
Owner's Manual
1 January 2022
8800294 Issue 1

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  • Page 1 Dolby DSR1260/DSR1280 Owner's Manual 1 January 2022 8800294 Issue 1...
  • Page 2 1275 Market Street San Francisco, CA 94103-1410 USA Telephone 415-558-0200 Fax 415-645-4000 http://www.dolby.com Trademarks Dolby and the double-D symbol are registered trademarks of Dolby Laboratories, Inc. The following are trademarks of Dolby Laboratories: Dialogue Intelligence Dolby Theatre ™ ® Dolby Dolby Vision ®...

  • Page 3: Table Of Contents

    Dolby DSR1260/DSR1280 design simulations..................9 General room placement........................11 General information about the Dolby DSR1260/DSR1280..............11 2.5.1 Placement of the Dolby DSR1260/DSR1280 on a wall or ceiling........... 11 2.5.2 Determining proper horizontal aiming for the side and rear surround loudspeakers....11 2.5.3 Side and rear surround vertical aiming..................

  • Page 4: Important Safety And Regulatory Information

    Dolby disclaims any liability, including damage or injury, for the use of mounting hardware supplied by any party other than Dolby. Any modification to Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...
  • Page 5 Caution: This symbol that appears on the unit and/or instruction manual is intended to alert the user to the presence of important safety operating and maintenance instructions. Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...
  • Page 6 For additional information regarding Waste Electrical and Electronic Equipment (WEEE) and product disposal go to http: dolby.com/us/en/about/environmental-commitment.html. Russian environmental regulations and compliance This product complies with Russia EAC RoHS requirements. Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 7: Introduction To The Dolby Speaker Dsr1260/Dsr1280

    The Dolby DSR1260, typically used for wall installations, features a 60° vertical dispersion pattern and an asymmetrical horizontal dispersion pattern of 60° at the top and 120° at the bottom.
  • Page 8 Introduction to the Dolby speaker DSR1260/DSR1280 • Dolby DSR1260/DSR1280 wire selection • Contacting Dolby Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 9: About This Documentation

    Figure 2: Dolby DSR1260 horn coverage 2.3 Dolby DSR1260/DSR1280 design simulations The Dolby DSR1260/DSR1280 uses GLL format files for software simulation modeling. The GLL files are used to simulate the DSR1260/DSR1280 in an acoustical simulation software. You can download the GLL files at https://professional.dolby.com/product/cinema-audio-products/DSR1280-...
  • Page 10 Dolby provides simulations for both speakers in both positions to meet the needs of an installation. Dolby DSR1260 GLL There are two GLL files for the DSR1260. The “DSR1260 Sidewall” is for sidewall simulations only. The zero- degree vertical aiming reference is the back of the enclosure, thus the polar has a built-in 15-degree downward angle from the transducers.

  • Page 11: General Room Placement

    2.5.1 Placement of the Dolby DSR1260/DSR1280 on a wall or ceiling The Dolby DSR1260/DSR1280 can be attached to a wall or ceiling. For 5.1 or Dolby Surround 7.1 rooms, you should follow common industry practices on speaker placement and aiming. For Dolby Atmos rooms, follow the Dolby Atmos Specification Guide, which can be found here: https://professional.dolby.com/siteassets/...

  • Page 12: Side And Rear Surround Vertical Aiming

    Introduction to the Dolby speaker DSR1260/DSR1280 For installations that utilize loudspeaker pairing, splaying the paired loudspeakers will improve sound coverage. For all loudspeaker pairs, we recommend these aiming parameters, based on the CLA: • Aim the forward paired loudspeaker to the near-side forward corner.

  • Page 13: Top Surround Position

    General information about the Dolby DSR1260/DSR1280 Figure 7: Side and rear vertical surround aiming example 2.5.4 Top surround position Top-surround loudspeakers must always be placed as left/right pairs, with the left loudspeaker and right loudspeaker at the same distance from the front wall.

  • Page 14: Selecting Brackets And Yokes

    This section can assist you in selecting the correct wire gauge. Typically, no more than 0.5 dB ( or 11%) of power should be lost in the cabling. The Dolby DSR1260/DSR1280 input plates accept an American wire gauge (AWG) of 18 AWG to 6 AWG (1 mm2-16 mm2).
  • Page 15 Contacting Dolby • Call: Americas: +1-415-645-4900 Europe/Middle East/Africa (EMEA): +44-33-0808-7700 Asia-Pacific (APAC): +86-400-692-6780 Japan: +81-3-4520-9798 Access documentation Visit customer.dolby.com. Submit feedback about this documentation Send an email to documentation@dolby.com Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 16: Assembling, Installing, And Aiming The Dolby Dsr1260/Dsr1280

    Assembling, installing, and aiming the Dolby DSR1260/DSR1280 The following sections provide instructions on how to assemble, install, and aim the DSR1260/ DSR1280. In the sections below, tools are required to complete the tasks. Please refer to each section for more details on required tools.

  • Page 17: Horn Rotation On The Dolby Dsr1260/Dsr1280

    3.1 Horn rotation on the Dolby DSR1260/DSR1280 The Dolby DSR1260/DSR1280 uses a standard four-hole mount bracket, which attaches to the back of the speaker for wall or ceiling installation, or a yoke, which is commonly used for sidewall installations. Please select mounting brackets and yokes that are compliant with section 2.6.

  • Page 18: Rotating The Horn On The Dolby Dsr1260/Dsr1280

    Dolby provides arrows at the top of the horn to indicate the correct orientation for installation of the of the speaker. The arrows should always be pointing toward the ceiling. Figure 12: Dolby DSR1260/DSR1280 directional arrows on horn 3.1.1 Rotating the horn on the Dolby DSR1260/DSR1280...
  • Page 19 Figure 14: Horn rotated 90 degrees with arrows facing up (Dolby DSR1260 shown for reference) 6. Place the horn back on the cabinet face, and then insert the eight Phillips-head screws.

  • Page 20: Installing Brackets

    10. Insert the remaining eight screws while pushing lightly on the grille, and then tighten to 2.5 Nm. 3.2 Installing brackets You must select a bracket that can support the weight of the Dolby DSR1260/DSR1280. The rear panel has an industry-standard hole pattern and will accept a variety of brackets for mounting and aiming.

  • Page 21: Installing A Yoke

    Installing a yoke Figure 16: Top bracket holes used to install the bracket 4. Add washers to the M6 bolts (included in the Dolby DSR1260/DSR1280 packaging), and then attach the bracket with the M6-washer combination. 5. Tighten the M6 bolts to the brackets to 2.5 Nm.

  • Page 22: Aiming The Dolby Dsr1260/Dsr1280 Using A Laser

    Figure 17: Dolby DSR1260/DSR1280 with yoke installed 3.4 Aiming the Dolby DSR1260/DSR1280 using a laser A laser can be used for accuracy when aiming the Dolby DSR1260/DSR1280. Instructions to aim vertically and horizontally are provided in this section. 3.4.1 Using a laser for horizontal aiming Place a laser pointer as described here to determine the correct horizontal position of the speaker.

  • Page 23: Using A Laser For Vertical Aiming

    2. Keep the laser level with the top of the speaker. You may find that there is some side-to-side drift, but this will not affect determining the vertical angle. 3. Angle the Dolby DSR1260/DSR1280 vertically until the laser is directed at the specified aiming point. Figure 19: Placement of laser for vertical aiming 3.5 Installing the safety cable...
  • Page 24 Attention: The eyebolt must have a threaded shaft at least 27 mm long to properly engage with the DSR1260/DSR1280 threaded inserts. Based on the weight of the Dolby DSR1260/DSR1280 (55 lb. [25kg]), all installer-supplied safety rigging hardware must have a minimum 5:1 safety factor, or greater if a higher requirement is mandated per local laws.

  • Page 25: Connecting The Dolby Dsr1260/Dsr1280

    Consult building plans and a licensed professional engineer, and follow all local laws for overhead mounting. 3.6 Connecting the Dolby DSR1260/DSR1280 This section provides information on how to connect the Dolby DSR1260/DSR1280 to your amplification system using installer-provided speaker cabling. About this task To be sure speakers work correctly, you must connect all electrical components properly.
  • Page 26 Note: In 5.1 and Dolby Surround 7.1 installations, it may be preferable to daisy-chain (series/ parallel) several DSR1260 or DSR1280 loudspeakers. This can be achieved by twisting wire pairs and inserting into the input connector per steps 3 and 4. When daisy-chaining loudspeakers, verify that the driving amplifier is rated to handle the resulting load impedance of the combined daisy- chained loudspeakers.

  • Page 27: Dolby Dsr1260/Dsr1280 Specifications

    Dolby DSR1260/DSR1280 specifications Dolby DSR1260/DSR1280 specifications The Dolby DSR1260/DSR1280 specifications are listed in this chapter. The list below is an outline of this chapter: • Dolby DSR1260 specifications • Dolby DSR1280 specifications • Dolby DSR1260/DSR1280 dimensions Dolby DSR1260/DSR1280 Owner's Manual...

  • Page 28: Dolby Dsr1260 Specifications

    Dolby DSR1260/DSR1280 specifications 4.1 Dolby DSR1260 specifications The Dolby DSR1260 specifications are listed here: Table 1: Dolby DSR1260 specifications Specification Technical data Notes Frequency range 55 Hz - 20 kHz +3dB/-6dB in half space conditions using required DSP Usable LF response...

  • Page 29: Dolby Dsr1280 Specifications

    Dolby DSR1280 specifications Table 1: Dolby DSR1260 specifications (continued) Specification Technical data Notes Whole Space Measured acoustic peak 136 dB Measured peak SPL over 5 seconds at SPL @ 1 meter rated Vrms using 12dB crest pink noise with required HPF...
  • Page 30 SPL @ 1 meter rated Vrms using 12dB crest pink noise with required HPF Weight 55 lb. (25 kg) Note: These specifications provide typical values and do not represent absolute limits. Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 31: Dolby Dsr1260/Dsr1280 Dimensions

    Dolby DSR1260/DSR1280 dimensions 4.3 Dolby DSR1260/DSR1280 dimensions The dimensions of the Dolby DSR1260/DSR1280 and its components are described here. Figure 24: Dimensions Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...
  • Page 32 Dolby DSR1260/DSR1280 specifications Figure 25: Dimensions Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 33: Dolby Dsr1260/Dsr1280 Signal Processing

    Dolby DSR1260/DSR1280 signal processing Dolby DSR1260/DSR1280 signal processing The Dolby DSR1260/DSR1280 digital signal processing is subject to a variety of requirements. The list below is an outline of this chapter: • Dolby DSR1260 signal processing • Dolby DSR1280 signal processing...

  • Page 34: Dolby Dsr1260 Signal Processing

    Dolby DSR1260/DSR1280 signal processing 5.1 Dolby DSR1260 signal processing The Dolby DSR1260 digital signal processing requirements are listed here: Table 3: Dolby DSR1260 high-pass & low-pass filtration requirements High-pass filter Low-pass filter 50Hz 24dB (4th order Butterworth) None Table 4: Dolby DSR1260 parametric equalization requirements...
  • Page 35 The Dolby CP850 and CP950 cinema processors use constant- bandwidth parametric EQ filters. Table 8: Dolby DSR1280 limiter requirements RMS limiting in Vrms Attack time in ms Release time in ms Peak stop in Vpk 64.8 Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 36: System Limiters

    System limiters System limiters You can use the RMS limiter in the DSP to set the system limiters. The list below is an outline of this chapter: • Setting system limiters Dolby DSR1260/DSR1280 Owner's Manual 8800294 Issue 1 1 January 2022...

  • Page 37: Setting System Limiters

    Caution: Loudspeaker damage as a result of exceeding the power handling specifications defined in Dolby DSR1260/DSR1280 specifications is not covered under the warranty. Caution: Hearing damage can occur by prolonged exposure to excessive sound pressure level (SPL);...

  • Page 38: Documentation Revision History

    Documentation revision history Documentation revision history The documentation revision history lists the date, issue number, and description of all publications of Dolby DSR1260/DSR1280 Owner's Manual . Date Issue Description 01 January 2022 Issue 1 Initial release Dolby DSR1260/DSR1280 Owner's Manual...
  • Page 39 Dolby Laboratories, Inc. 1275 Market Street, San Francisco, CA 94103-1410 USA. 2022 Dolby Laboratories. All rights reserved. Dolby and the double-D symbol are registered trademarks of Dolby Laboratories. © All other trademarks remain the property of their respective owners.

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