Design a/e note guide specification conventions color-highlighted text

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Rev 19JUN09 j:\Projects\Active\com-deca_design_criteria_revisions-04071\Guide Specifications\TJG Innformation



Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.



1.1.1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.1.2. Section 13853, Mass Notification System

1.1.3. Section 13851, Fire Alarm System


1.2.1. This Section includes equipment for amplifying, distributing, and reproducing sound signals.


Retain abbreviation and terms that remain after this Section has been edited.

1.3.1. Channels: Separate parallel signal paths, from sources to loudspeakers or loudspeaker zones, with separate amplification and switching that permit selection between paths for speaker alternative program signals.

1.3.2. Zone: Separate group of loudspeakers and associated supply wiring that may be arranged for selective switching between different channels.

1.3.3. VU: Volume unit.


1.4.1. Product Data: For the following:

Adjust list below to suit Project. Tape Cassette Deck CD Player Deck AM/FM Tuner Programmed Prerecorded Announcement Unit Preamplifiers. Power amplifiers. Microphone. Volume limiter/compressor. Mass Notification paging adapter. Telephone paging adapter. Tone generator. Equipment cabinet and rack. Monitor panel. Loudspeakers. Noise-operated gain controller for Sales Area Zone.

Retain first paragraph and subparagraphs below if products are required to withstand specific design loads and Architect either has delegated design responsibility to Contractor or wants to review structural data as another way to verify products' compliance with performance requirements. Professional engineer qualifications are specified in Division 1 Section "Quality Requirements."

1.4.2. Shop Drawings: Signed and sealed by a qualified professional engineer. Design Calculations: Calculate requirements for selecting seismic restraints for central control cabinets. Equipment Details: Detail equipment assemblies and indicate dimensions, weights, required clearances, method of field assembly, components, and location of each field connection.

Delete subparagraphs and associated subparagraphs below if not required. Control panels. Rack arrangements. Wiring Diagrams: Power, signal, and control wiring. Include the following:

a. Identify terminals to facilitate installation, operation, and maintenance.

b. Single-line diagram showing interconnection of components.

c. Cabling diagram showing cable routing.

Retain paragraph and subparagraphs below if required by seismic criteria applicable to Project. Coordinate with Division 16 Section "Seismic Controls for Electrical Work."

1.4.3. Manufacturer Seismic Qualification Certification: Submit certification that public address and music equipment, accessories, and components will withstand seismic forces defined in Division 16 Section "Seismic Controls for Electrical Work." Include the following: Basis for Certification: Indicate whether withstand certification is based on actual test of assembled components or on calculation.

a. The term "withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified." Dimensioned Outline Drawings of Equipment Unit: Identify center of gravity and locate and describe mounting and anchorage provisions. Detailed description of equipment anchorage devices on which the certification is based and their installation requirements.

Coordinate paragraph below with qualification requirements in Division 1 Section "Quality Requirements" and as supplemented in "Quality Assurance" Article.

1.4.4. Qualification Data: For Installer and testing agency.

Retain first paragraph below if Contractor is responsible for field quality-control testing.

1.4.5. Field quality-control test reports.

1.4.6. Operation and Maintenance Data: For public address and music equipment to include in emergency, operation, and maintenance manuals.


1.5.1. Installer Qualifications: Manufacturer's authorized representative who is trained and approved for installation of units required for this Project.

Revise subparagraph below to suit Project location. Maintenance Proximity: Not more than <Insert number> hours' normal travel time from Installer's place of business to Project site.

If an independent testing agency is required, see Division 1 Section "Quality Requirements" for general testing and inspecting agency qualification requirements. If additional control is needed, use first paragraph below to specify 29 CFR 1910.7 or other more specific criteria (e.g., NETA). 29 CFR 1910.7 defines a nationally recognized testing laboratory as it applies to testing and inspecting for safety, and lists, labels, or accepts equipment and materials that meet OSHA criteria.

Retain first paragraph and subparagraph below if Contractor selects testing agency.

1.5.2. Testing Agency Qualifications: An independent agency, with the experience and capability to conduct the testing indicated, that is a member company of the InterNational Electrical Testing Association or is a nationally recognized testing laboratory (NRTL) as defined by OSHA in 29 CFR 1910.7, and that is acceptable to authorities having jurisdiction. Testing Agency's Field Supervisor: Person currently certified by the InterNational Electrical Testing Association or the National Institute for Certification in Engineering Technologies to supervise on-site testing specified in Part 3.

1.5.3. Source Limitations: Obtain public address and music equipment through a single source authorized by manufacturer to distribute each product.

1.5.4. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

1.5.5. Comply with NFPA 70.

1.5.6. Comply with NFPA 72 requirements for speech intelligibility.

1.5.7. Comply with UL 50.


Edit this Article to delete or add types of construction that penetrate or are supported by ceilings.

1.6.1. Coordinate layout and installation of system components and suspension system with other construction that penetrates ceilings or is supported by them, including light fixtures, HVAC equipment, fire-suppression system, and partition assemblies.



See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers and products.

2.1.1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: Alpha Communications. Altec Lansing Technologies, Inc. Atlas Soundolier; Atlas Sound. Bogen Communications International, Inc. Dukane Corporation; Communications Systems Div. Electro-Voice, Inc. Executone Information Systems, Inc. Federal Signal Corporation; Electrical Products Division. Peavey Electronics Corporation. Rauland-Borg Corporation. Whelen Engineering Company, Inc.


Descriptions below are offered as examples only. Revise this Article to convey design intent to Contractor and Installer.

2.2.1. System Functions: Include the following:

Delete functions in subparagraphs below that are not required and edit remaining descriptions to suit Project; add other functions as required. Providing [three] separate zones unless otherwise noted or shown on drawings. Selectively connecting separate zones to different signal channels. Selectively amplifying sound among various microphone outlets and other inputs. Recording and playing in-store promotional announcements at programmed times. Communicating simultaneously to all zones regardless of zone or channel switch settings. Paging to all zones, by dialing an extension from any local telephone instrument and speaking into the telephone. Priority transmission of Mass Notification signals to all zones. Producing a program-signal tone that is amplified and sounded over all speakers, overriding signals currently being distributed. Reproducing high-quality sound that is free of noise and distortion at all loudspeakers at all times during equipment operation including standby mode with inputs off; and output free of nonuniform coverage of amplified sound.


2.3.1. Coordinate features to form an integrated system. Match components and interconnections for optimum performance of specified functions.

2.3.2. Equipment: Modular type using solid-state components, fully rated for continuous duty, unless otherwise indicated. Select equipment for normal operation on input power usually supplied at 110 to 130 V, 60 Hz.

2.3.3. Waterproof Equipment: Loudspeakers listed and labeled for duty outdoors or in damp locations.


2.4.1. Comply with TIA/EIA SE-101-A; either separately mounted or as an integral part of power amplifier.

2.4.2. Output Power: Plus 4 dB above 1 mW at matched power-amplifier load.

2.4.3. Total Harmonic Distortion: Less than 1 percent.

2.4.4. Frequency Response: Within plus or minus 2 dB from 20 to 20,000 Hz.

2.4.5. Input Jacks: Minimum of two. One matched for low-impedance microphone; the other matchable to cassette deck, CD player, or radio tuner signals without external adapters.

2.4.6. Minimum Noise Level: Minus 55 dB below rated output.

2.4.7. Controls: On/off, input levels, and master gain.


2.5.1. Comply with TIA/EIA SE-101-A.

Revise first paragraph below to suit Project.

2.5.2. Mounting: Rack mounted.

2.5.3. Output: 70-V balanced line.

2.5.4. Frequency Response: Within plus or minus 2 dB from 50 to 12,000 Hz.

2.5.5. Minimum Signal-to-Noise Ratio: 60 dB, at rated output.

2.5.6. Total Harmonic Distortion: Less than 3 percent at rated power output from 50 to 12,000 Hz.

2.5.7. Output Regulation: Less than 2 dB from full to no load.

2.5.8. Controls: On/off, input levels, and low-cut filter.

2.5.9. Input Sensitivity: Matched to preamplifier and providing full-rated output with sound-pressure level of less than 10 dynes/sq. cm impinging on speaker microphone or handset transmitter.


Parameters listed in this Article are typical values. Performance and product characteristics vary among manufacturers. Revise to suit Project.

2.6.1. Microphone: Comply with TIA/EIA SE-105. Type: Dynamic, with cardioid polar or omnidirectional characteristic. Impedance: 150 ohms. Frequency Response: Uniform, 50 to 14,000 Hz. Output Level: Minus 58 dB minimum. Finish: Satin chrome. Cable: C25J. Mounting: Desk stand with integral-locking, press-to-talk switch. Quantity of Microphones: One. Quantity of Desk Stands: One.

2.6.2. AM/FM Tuner: Rack-mounted, with manual and signal-seeking tuning for the standard AM and FM broadcast bands. Sensitivity and audio quality commensurate with that of the remainder of the sound system.

2.6.3. Cassette Deck: Rack mounted, auto-reverse cassette tape deck, capable of recording and playing standard audio cassettes at 1-7/8 i.p.s. tape speed. Audio quality commensurate with the remainder of the sound system.

2.6.4. CD Player Deck: Rack mounted, five-cd changer for playing audio compact discs. Audio quality commensurate with the remainder of the sound system.

2.6.5. Programmed Prerecorded Promotional Announcement Unit: Rack mounted digital recorder for recording promotional announcements from microphone or downloading from cassette tape input; capable of programmed playback of selected announcements from non-volatile memory at predetermined times over the Music/PA system, fading the background music during the announcements. Audio quality commensurate with the remainder of the sound system.

Delete paragraph and subparagraphs below for small, simple systems.

2.6.6. Volume Limiter/Compressor: Equip each zone with a volume limiter/compressor. Install in central equipment cabinet. Arrange to provide a constant input to power amplifiers. Frequency Response: 45 to 15,000 Hz, plus or minus 1 dB minimum. Signal Reduction Ratio: At least a 10:1 and 5:1 selectable capability. Distortion: 1 percent, maximum. Rated Output: Minimum of plus 14 dB. Inputs: Minimum of two inputs with variable front-panel gain controls and VU or dB meter for input adjustment.

Delete paragraph and subparagraphs below if not required or revise to suit Project. Console can vary from small switch and pilot-light panel to large, complex unit. Coordinate with Drawings for identification of items to be mounted and for console mounting provision, e.g., desk, counter, wall, etc.

2.6.7. Control Console: Contained within equipment rack, providing switching and control of all input sources, and gain and program controls for all zones. Provide a monitor speaker and circuit-closing headphone jack with switching and volume control, to monitor program or volume adjustments.

2.6.8. Mass Notification Paging Adapter: Arranged to accept alert tones and voice messages from the mass notification system panel, muting all other inputs, and distributing to all zones simultaneously. Adapter shall adjust gain and frequency response for maximum speech intelligibility to comply with NFPA 72 requirements for emergency voice transmissions.

2.6.9. Telephone Paging Adapter: Arranged to accept voice signals from telephone extension dialing access and to automatically provide amplifier input and program override for preselected zones. Minimum Frequency Response: Flat, 200 to 2500 Hz. Impedance Matching: Adapter matches telephone line to public address equipment input.

Delete paragraph and subparagraphs below if not required.

2.6.10. Tone Generator: For clock and program interface. Signals Produced: Minimum of seven distinct, audible signal types including wail, warble, high/low, alarm, repeating chimes, single-stroke chime, and tone. Pitch Control: Chimes and tone. Volume Control: All outputs. Activation-Switch Network: Establishes priority and hierarchy of output signals produced by different activation setups.

2.6.11. Equipment Rack: Comply with TIA/EIA-310-D. House amplifiers and auxiliary equipment in standard TIA/EIA 19-inch racks. Group items of same function together, either vertically or side by side, and arrange controls symmetrically. Power-Supply Connections: Approved plugs and receptacles. Arrange all inputs, outputs, interconnections, and test points so they are accessible at rear of rack for maintenance and testing, with each item removable from rack without disturbing other items or connections. Blank Panels: Cover empty space in equipment racks so entire front of rack is occupied by panels. Enclosure Panels: Ventilated rear and sides and solid top. Use louvers in panels to ensure adequate ventilation. Finish: Uniform, baked-enamel factory finish over rust-inhibiting primer. Power-Control Panel: On front of equipment housing, with master power on/off switch and pilot light; and with socket for 5-A cartridge fuse for rack equipment power. Service Light: At top rear of rack with an adjacent control switch. Vertical Plug Strip: Grounded receptacles, 12 inches o.c. the full height of rack, to supply rack-mounted equipment. Maintenance Receptacles: Duplex convenience outlets supplied independent of vertical plug strip and located in front and bottom rear of rack. Spare Capacity: [20] <Insert value> percent spare space capacity in rack for future equipment.

Delete paragraph and subparagraphs below if not required.

2.6.12. Monitor Panel: Mounted above amplifiers. Equip with VU or dB meter, speaker with volume control, and multiple-position rotary selector switch. Connect selector switch and volume control to permit selective monitoring of output of each separate power amplifier via VU or dB meter and speaker.

Coordinate paragraph and subparagraphs below with Drawings.

2.6.13. Cone-Type Loudspeakers: Comply with TIA/EIA SE-103. Minimum Axial Sensitivity: TIA/EIA pressure rating of 45 dB. Frequency Response: Within plus or minus 3 dB from 50 to 15,000 Hz. Size: 8 inches with 1-inch voice coil and minimum 5-oz. ceramic magnet. Minimum Dispersion Angle: 100 degrees. Rated Output Level: 10 W. Matching Transformer: Comply with TIA/EIA-160. Full-power rated with four TIA/EIA standard taps. Maximum insertion loss of 0.5 dB. Surface-Mounting Units: Ceiling, wall, or pendant mounting, as indicated, in steel back boxes, acoustically dampened. Front face of at least 0.0478-inch steel and whole assembly rust proofed[, primed and finished in white baked enamel] [ and shop primed for field painting].

Revise finish description above and below to suit aesthetic requirements. Flush-Ceiling-Mounting Units: In steel back boxes, acoustically dampened. Metal ceiling grille with white baked enamel.

Device below is specified as a sample. Revise to suit Project and manufacturer's standard equipment. Coordinate with Drawings.

2.6.14. Horn-Type Loudspeakers: Comply with TIA/EIA SE-103. Type: Single-horn units, double-reentrant design, with minimum full-range power rating of 15 W. Waterproof design approved for wet locations, when used in refrigerated processing or storage rooms subject to washdown, or in other locations subject to wet conditions. Matching Transformer: Comply with TIA/EIA-160. Full-power rated with four TIA/EIA standard taps. Maximum insertion loss of 0.5 dB. Frequency Response: Within plus or minus 3 dB from 250 to 12,000 Hz. Dispersion Angle: 130 by 110 degrees. Mounting: Integral bracket.

Delete paragraph and subparagraphs below if volume attenuator stations are not used in the project.

2.6.15. Volume Attenuator Station: Wall-plate-mounted autotransformer type with paging priority feature. Wattage Rating: 10 W, unless otherwise indicated. Attenuation per Step: 3 dB, with positive off position. Insertion Loss: 0.4 dB maximum. Attenuation Bypass Relay: Single pole, double throw. Connected to operate and bypass attenuation when all-call, paging, program signal, or prerecorded message features are used. Relay returns to normal position at end of priority transmission. Label: "PA Volume."

Edit two paragraphs below to suit Project.

2.6.16. Microphone Outlet: Three-pole, polarized, locking-type, microphone receptacles in single-gang boxes. Equip wall outlets with brushed stainless-steel device plates.

2.6.17. Conductors and Cables: Jacketed, twisted pair and twisted multipair, untinned solid copper. Insulation for Wire in Conduit: Thermoplastic, not less than 1/32 inch thick. Microphone Cables: Neoprene jacketed, not less than 2/64 inch thick, over shield with filled interstices. Shield No. 34 AWG tinned, soft-copper strands formed into a braid or approved equivalent foil. Shielding coverage on conductors is not less than 60 percent. Plenum Cable: Listed and labeled for plenum installation.



3.1.1. Wiring Method: Install wiring in raceways except within consoles, desks, and counters. Conceal cables and raceways except in unfinished spaces.

Revise remaining paragraphs below to suit Project.

3.1.2. Wiring within Enclosures: Bundle, lace, and train conductors to terminal points with no excess. Use lacing bars in cabinets.

3.1.3. Control-Circuit Wiring: Install number and size of conductors as recommended by system manufacturer for control functions indicated.

3.1.4. Separation of Wires: Separate speaker-microphone, line-level, speaker-level, and power wiring runs. Install in separate raceways or, where exposed or in same enclosure, separate conductors at least 12 inches for speaker microphones and adjacent parallel power and telephone wiring. Separate other intercommunication equipment conductors as recommended by equipment manufacturer.

3.1.5. Splices, Taps, and Terminations: Arrange on numbered terminal strips in junction, pull, and outlet boxes; terminal cabinets; and equipment enclosures.

3.1.6. Match input and output impedances and signal levels at signal interfaces. Provide matching networks where required.

3.1.7. Identification of Conductors and Cables: Color-code conductors and apply wire and cable marking tape to designate wires and cables so they identify media in coordination with system wiring diagrams.

3.1.8. Wall-Mounting Outlets: Flush mounted.

3.1.9. Conductor Sizing: Unless otherwise indicated, size speaker circuit conductors from racks to loudspeaker outlets not smaller than No. 18 AWG and conductors from microphone receptacles to amplifiers not smaller than No. 22 AWG.

3.1.10. Weatherproof Equipment: For units that are mounted outdoors, in damp locations, or where exposed to weather, install consistent with requirements of weatherproof rating.

3.1.11. Speaker-Line Matching Transformer Connections: Make initial connections using tap settings indicated on Drawings.

3.1.12. Connect wiring according to Division 16 Section "Conductors and Cables."


Revise this Article to suit system requirements. Include grounding electrodes for special applications only.

3.2.1. Ground cable shields and equipment to eliminate shock hazard and to minimize ground loops, common-mode returns, noise pickup, cross talk, and other impairments.

3.2.2. Signal Ground Terminal: Locate at main equipment cabinet. Isolate from power system and equipment grounding.


Retain paragraph below to require a factory-authorized service representative to perform, or assist Contractor with, field inspections, tests, and adjustments. Retain one of two options to suit Project; delete both to require only an inspection before field testing.

3.3.1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust field-assembled components and equipment installation, including connections. Report results in writing.

3.3.2. Perform the following field tests and inspections and prepare test reports:

Retain subparagraphs below with either of last two paragraphs above. Edit to suit Project. Schedule tests with at least seven days' advance notice of test performance. After installing public address and music equipment and after electrical circuitry has been energized, test for compliance with requirements. Operational Test: Perform tests that include originating program and page messages at microphone outlets, preamplifier program inputs, Mass Notification inputs, and other inputs. Verify proper routing and volume levels and that system is free of noise and distortion. Signal-to-Noise Ratio Test: Measure signal-to-noise ratio of complete system at normal gain settings as follows:

a. Disconnect microphone at connector or jack closest to it and replace it in the circuit with a signal generator using a 1000-Hz signal. Replace all other microphones at corresponding connectors with dummy loads, each equal in impedance to microphone it replaces. Measure signal-to-noise ratio.

b. Repeat test for each separately controlled zone of loudspeakers.

c. Minimum acceptance ratio is 50 dB. Distortion Test: Measure distortion at normal gain settings and rated power. Feed signals at frequencies of 50, 200, 400, 1000, 3000, 8000, and 12,000 Hz into each preamplifier channel. For each frequency, measure distortion in the paging and all-call amplifier outputs. Maximum acceptable distortion at any frequency is 3 percent total harmonics. Acoustic Coverage Test: Feed pink noise into system using octaves centered at 500 and 4000 Hz. Use sound-level meter with octave-band filters to measure level at five locations in each zone. For spaces with seated audiences, maximum permissible variation in level is plus or minus 2 dB. In addition, the levels between locations in the same zone and between locations in adjacent zones must not vary more than plus or minus 3 dB. Power Output Test: Measure electrical power output of each power amplifier at normal gain settings of 50, 1000, and 12,000 Hz. Maximum variation in power output at these frequencies must not exceed plus or minus 1 dB. Signal Ground Test: Measure and report ground resistance at pubic address equipment signal ground. Comply with testing requirements specified in Division 16 Section "Grounding and Bonding."

3.3.3. Retesting: Correct deficiencies, revising tap settings of speaker-line matching transformers where necessary to optimize volume and uniformity of sound levels, and retest. Prepare a written record of tests.

3.3.4. Inspection: Verify that units and controls are properly labeled and interconnecting wires and terminals are identified. Prepare a list of final tap settings of paging speaker-line matching transformers.


Delete first paragraph below if factory-authorized service representative is not required.

3.4.1. Engage a factory-authorized service representative to perform startup service.

3.4.2. Verify that electrical wiring installation complies with manufacturer's submittal and installation requirements.

3.4.3. Complete installation and startup checks according to manufacturer's written instructions.


Delete this Article if Owner contracts separately for this service. Consider including a provision for submitting a continuing maintenance agreement proposal.

3.5.1. On-Site Assistance: Engage a factory-authorized service representative to provide on-site assistance in adjusting sound levels, resetting transformer taps, and adjusting controls to meet occupancy conditions.

3.5.2. Occupancy Adjustments: When requested within 12 months of date of Substantial Completion, provide on-site assistance in adjusting system to suit actual occupied conditions. Provide up to two visits to site outside normal occupancy hours for this purpose, without additional cost.


3.6.1. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain public address and music equipment. Refer to Division 1 Section "Phase Turnover and Contract Closeout."


June 2010


16726 -

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