MAINE ARMY NATIONAL GUARD
ARMED FORCES RESERVE CENTER
BRUNSWICK, MAINE
P.N. 230071
SECTION 275116 - PUBLIC ADDRESS AND MUSIC EQUIPMENT
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
1.3
This Section includes equipment for amplifying, distributing, and reproducing sound signals for
the Assembly Hall.
DEFINITIONS
A.
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.
B.
Zone: Separate group of loudspeakers and associated supply wiring that may be arranged for
selective switching between different channels.
C.
VU: Volume unit.
1.4
PERFORMANCE REQUIREMENTS
A.
Delegated Design: Design supports and seismic restraints for control consoles, equipment
cabinets and racks, and components, including comprehensive engineering analysis by a
qualified professional engineer, using performance requirements and design criteria indicated.
B.
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 and the unit will be fully operational
after the seismic event.”
1.5
SUBMITTALS
A.
Submittals shall comply with the requirements of the Construction Contract Clauses, Section
013000 "Submittal Procedures" and the individual sections specifying the work.
B.
Product Data: For the following:
1.
2.
3.
Preamplifiers.
Power amplifiers.
Hearing Assistance Equipment.
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4.
5.
6.
7.
8.
9.
10.
C.
P.N. 230071
Microphone.
Volume limiter/compressor.
Control console.
Equipment cabinet and rack.
Loudspeakers.
Noise-operated gain controller.
Microphone and headphone outlets.
Shop Drawings: Signed and sealed by a qualified professional engineer.
1.
2.
3.
4.
5.
6.
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.
Console layouts.
Control panels.
Speaker locations and aiming.
Wiring Diagrams: Power, signal, and control wiring. Include the following:
a.
b.
c.
Identify terminals to facilitate installation, operation, and maintenance.
Single-line diagram showing interconnection of components.
Cabling diagram showing cable routing.
D.
Provide conduit layouts to General Contractor for inclusion in project coordination drawings.
Include conduit size, and allowances for conduit supports.
E.
Provide equipment cut sheets to General Contractor for inclusion in project coordination
drawings. Include all equipment dimensions, noting manufacturer's clearance requirements, as
well as location and sizes of all equipment connections.
F.
Manufacturer Seismic Qualification Certification: Submit certification that public address and
music equipment, accessories, and components will withstand seismic forces defined in
Division 26 Section "Vibration and Seismic Controls for Electrical Systems." Include the
following:
1.
Basis for Certification: Indicate whether withstand certification is based on actual test of
assembled components or on calculation.
a.
b.
2.
3.
G.
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."
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 and the
unit will be fully operational after the seismic event."
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.
Qualification Data: For Installer.
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P.N. 230071
H.
Field quality-control test reports.
I.
Operation and Maintenance Data: For public address and music equipment to include in
operation and maintenance manuals.
1.6
QUALITY ASSURANCE
A.
Installer Qualifications: Manufacturer's authorized representative who is trained and approved
for installation of units required for this Project.
1.
Maintenance Proximity: Not more than one and one half hours normal travel time from
Installer's place of business to Project site.
B.
Source Limitations: Obtain public address and music equipment through a single source
authorized by manufacturer to distribute each product.
C.
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.
D.
Comply with NFPA 70.
E.
Comply with UL 50.
1.7
COORDINATION
A.
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.
B.
Coordinate installation of system and integration with intercom paging system and
Government’s audio visual equipment.
1.8
PROJECT CONDITIONS
A.
Environmental Limitations: Do not deliver or install wiring, speakers and connecting materials
until wet work in spaces is complete and dry, and temporary HVAC system is operating and
maintaining ambient temperature and humidity conditions at occupancy levels during the
remainder of the construction period.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
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:
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1.
2.
3.
4.
5.
2.2
P.N. 230071
Alpha Communications.
Altec Lansing Technologies, Inc.
Atlas Soundolier; Atlas Sound.
Dukane Corporation; Communications Systems Div.
Peavey Electronics Corporation.
FUNCTIONAL DESCRIPTION OF SYSTEM
A.
System Functions: Include the following:
1.
2.
Provide a -10dB balanced audio line level output from the pubic address system to each
local sound system amplifier for interface to the public address system.
General:
a.
Provide for a complete and satisfactory operating stand alone sound reinforcement
systems for the following areas: Assembly Hall West and Assembly Hall East for
the pickup, amplification, distribution and reproduction of voice and/or other audio
program material. Provide one combined Rack mounted system for the two
sections of the Assembly Hall. System shall be configured to work as follows:
1)
2)
3)
4)
b.
c.
2.3
Assembly Hall West sound system.
Assembly Hall East sound system.
Combined both sections of Assembly Hall.
Building intercom system interface for broadcast over sound system
speakers.
All equipment, except portable equipment, shall be held firmly in place. This shall
include all loudspeakers and amplifiers. Fastenings and supports shall be adequate
to support their loads with a safety factor of at least three.
All switches, amplifier equipment and microphone outlets shall be clearly,
logically, and permanently marked using proper size engraved laminated plastic
name tags fastened with screws for a permanent type of adhesive. In order to
protect the Government and to insure the availability of warranty service and parts,
the installing supplier shall be a factory authorized representative for the products
they are supplying. A letter authorizing representation shall be supplied and
included in the submittals.
EQUIPMENT AND MATERIALS
A.
Coordinate features to form an integrated system. Match components and interconnections for
optimum performance of specified functions.
B.
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.
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2.4
P.N. 230071
MULTI-CHANNEL AMPLIFIERS, RACK MOUNTED
A.
The multi-channel amplifier shall provide eight individual channels of power amplification and
shall provide 150 watts/channel into 4 ohms, with channels bridgeable in pairs to provide 300
watts into 8 ohms. Channel inputs shall be line-level. The amplifier shall be CE marked, UL
listed and shall incorporate AES48-2005 Grounding & EMC practices. Provide equipment by
BIAMP or approved equal model.
B.
The unit shall be packaged in a rugged metal case, and shall operate from 120 volts AC, 60 Hz
power.
C.
The internal amplifier shall be capable of delivering pre-amp outputs.
D.
The amplifier shall be the product of a manufacturer with at least 10 years of experience in the
manufacturing of solid state amplifiers.
2.5
DIGITAL SIGNAL PROCESSOR (DSP)
A.
The DSP conference system shall provide minimum ten balanced mic/line inputs and minimum
six balanced mic/line outputs on plug-in barrier-strip connectors. Inputs and outputs shall be
analog, with internal 24-bit A/D & D/A converters operating at a sample rate of 48 kHz.
Internal processing shall be digital processing.
B.
DSP system components shall be connected using software provided on each hardware unit.
Available system components shall include (but not limited to) various forms of: mixers,
equalizers, filters, crossovers, dynamics/gain controls, routers, delays, remote controls, meters,
generators, and diagnostics. Ethernet communications shall be utilized for software control and
configuration. The DSP conference system shall be UL listed, The DSP conference system shall
be Nexia CS or approved equal.
2.6
CONTROL PANEL CONSOLE
A.
The control panel shall provide programmable remote control of volume and selection functions
for Audio equipment. The control shall be a PoE network appliance with a graphical display and
touch scroll wheel for menu navigation and selection. The connector shall be made using a
standard RJ-45 connector and Cat 6 wiring. The control panel shall be BIAMP Ethernet Device
or approved equal.
B.
Control panel shall be configured to control following input functions:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Building intercom.
Wireless Mic 1.
Wireless Mic 2.
IPOD/MP3 player.
Computer or CD Player.
Wired Mic 1.
Wired Mic 2.
Wired Mic 3.
Wired Mic 4.
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C.
Control panel shall be configured to control following output functions:
1.
2.
3.
2.7
P.N. 230071
Assembly West Preset.
Assembly East Preset.
Combine Both Sections Preset.
COMPONENTS
A.
Hearing Assistance Equipment:
1.
2.
Provide a system consisting of an FM transmitter, an antenna mounted on the equipment
rack, and portable battery-operated receivers with earphones and inductive couplers (the
latter for use with hearing aids with "T" switches). Provide frequencies separate and free
from interference with other FM systems. Provide all hearing assistance system
components from the same manufacturer.
Transmitter:
a.
Acceptable:
1)
2)
3)
b.
3.
Quantity: Three (3).
Transmitter Antenna: Mount antenna outside of equipment rack for optimum reception.
Provide with extension cable.
a.
Acceptable:
1)
2)
3)
b.
4.
Williams ANT 021 antenna w/ RG-59 extension cable.
Phonic Ear AT 564-1 or AT 565-1 as required by frequency w/ RG58/U extension cable.
Telex TW-A antenna w/ extension cable.
Quantity: Three (3).
Receiver: Provide complete with dual mini-earbud earphones.
a.
Acceptable:
1)
2)
3)
b.
5.
Williams PPA T35 and RPK 006 rack mounting kit.
Phonic Ear PE550T transmitter and AT575 rack mounting kit.
Telex ST200 transmitter and RM-D rack mounting kit.
Williams PPA R7 w/ Williams EAR 014.
Phonic Ear PE 300R w/ Phonic Ear 538-S.
Telex SR-100 w/ Telex DEB-2.
Quantity: Eighteen (18).
Neckloop Induction Coil.
a.
Acceptable:
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1)
2)
3)
b.
6.
Quantity: Three (3).
Acceptable:
1)
2)
3)
4)
b.
Quantity: Three (3).
Acceptable:
1)
2)
3)
b.
Quantity: One Hundred (100) replacement pads.
Acceptable:
1)
2)
3)
b.
B.
Williams EAR 015-10.
Phonic Ear AT538-SP.
Telex CCS-12.
Over-Ear Earphones
a.
9.
Altec 15356.
Sescom MI-18.
Sescom MI-100.
Triad A67J.
Replacement Cushions: Acceptable replacement cushions:
a.
8.
Williams NKL 001.
Phonic Ear AT-163-B.
Telex NL-4S.
600 ohm 1:1 Impedance Ratio Transformer: Install at transmitter audio input.
a.
7.
P.N. 230071
Williams EAR 008.
Phonic Ear.
Telex Equivalent.
Quantity: Fifteen (15).
Provide one (1) wall mounted lockable equipment rack for hearing assistance equipment
to be located in Room 110.
Equipment Cabinet: Comply with TIA/EIA-310-D. House amplifiers and auxiliary equipment
at each location.
1.
Cabinet Housing: Construct of 0.0478-inch steel, minimum, with front- and rear-locking
doors and standard TIA/EIA 19-inch racks. Arrange for wall mounting as indicated.
Sized to house all equipment indicated plus spare capacity. Include 20 percent minimum
spare capacity for future equipment over and above space required for future CD player.
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2.
3.
C.
Power Provisions: Install a single switch in cabinet to supply cabinet power distribution
system and electrical outlets, uniformly spaced, to accommodate ac-power cords for each
item of equipment.
Ventilation: A low-noise fan for forced-air cabinet ventilation. Equip fan with a filtered
input vent and connect to operate from 105- to 130-V ac, 60 Hz; separately fused and
switchable; arranged to be powered when main cabinet power switch is on.
Loudspeakers:
1.
The main sound reinforcement loudspeakers shall be a self contained, wide range device with
a wide coverage pattern. The frequency range shall be 65 Hz to 18,000 Hz, + 3dB. Dispersion
of 90 (or 120) x 60 degrees. The speaker shall have a sensitivity of 97 dB, 1 Watt at 1 meter,
or more. Speaker shall include a heavy duty 12” woofer and extended range 2” titanium HF
driver. Enclosure made of multi-ply hardwood and all hardware shall be steel or aluminum.
Provide equipment by Renkus-Heinz Inc. or approved equal. Provide minimum of eight (8).
a.
b.
D.
Frequency Response: 20 to 20,000 Hz, plus or minus 1 dB.
Level Adjustment Range: 20 dB minimum.
Maximum Distortion: 1 percent.
Control: Permits adjustment of sensing level of device.
Conductors and Cables: Jacketed, twisted pair and twisted multipair, untinned solid copper.
1.
2.
3.
F.
Each unit shall be provided with a manufacturer supplied hanging kit for every
speaker.
Locations and quantity of units to be calculated by the speaker manufacturer for
proper coverage of the space and providing the highest articulation.
Noise-Operated Gain Controller: Units continuously sense space noise level and automatically
adjust signal level to local speakers.
1.
2.
3.
4.
E.
P.N. 230071
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.
Accessories For All Local Sound:
1.
2.
3.
Override relay & hardware required at each local sound system amplifier to allow all
public address announcements to mute the local sound system audio for the duration of
the announcements. Provide – one ( 1 ).
Flush Wall Microphone outlets shall be Soundolier S501-13C with C3F type connectors.
Quantity of outlets shall be as indicated on the drawings. Cable shall be as specified
herein.
The microphone shall be Peavey PVM 38i or approved equal dynamic cardioid
microphone. Provide two ( 2 ).
a.
The frequency response shall be 40-16,000 Hz, with an output level at 1000hz as
follows: open circuit voltage, - 75db (0.178mV) (0db=1V/microbar); power level,
-55db (0db=1mW10/microbars). Front to back ratio shall be 25db. An impedance
of 250 ohms shall be provided.
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b.
c.
4.
5.
6.
G.
The microphone shall be equipped with a three-pin XLR type connector and a
5/8"-27 thread quick release stand adapter. The case shall incorporate a low
profile SPST slide switch which shall line short in the "off" position. A screw
adjustable switch lock shall be provided.
The microphone shall be supplied with a detachable 25-foot heavy duty twoconductor shielded cable with a black A3F connector at the microphone. The
overall size of the microphone shall not exceed 1 23/32" in diameter, and 7 5/16"
in length, nor shall it weigh more than 9.5 ounces. Provide with every microphone.
Microphone Desk Stand shall be an Atlas DS-7. Provide one (1).
Microphone Floor Stand shall be an Atlas MS12C. Provide one (1).
Microphone Gooseneck Adapter shall be Atlas GN-19. Provide one (1).
CD Player unit with IR remote control and a built-in input source select switch: Pasco
#PAD500
1.
2.
2.8
P.N. 230071
System shall be installed with additional equipment as required to provide recording
capabilities from any microphone location in the system and also play all media outputs
on associated system speakers.
Rack Mount Kit: Pasco #PRM510.
FIRE ALARM SYSTEM INTERFACE
A.
Voice evacuation signal from fire alarm control panel shall override public address system
signal.
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Wiring Method: Install wiring in raceways except within consoles, cabinets, desks, and
counters. Use plenum cable in environmental air spaces including plenum ceilings. Conceal
cables and raceways.
B.
Wiring within Enclosures: Bundle, lace, and train conductors to terminal points with no excess.
Use lacing bars in cabinets.
C.
Control-Circuit Wiring: Install number and size of conductors as recommended by system
manufacturer for control functions indicated.
D.
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.
E.
Splices, Taps, and Terminations: Arrange on numbered terminal strips in junction, pull, and
outlet boxes; terminal cabinets; and equipment enclosures.
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F.
Match input and output impedances and signal levels at signal interfaces. Provide matching
networks where required.
G.
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.
H.
Wall-Mounting Outlets: Flush mounted.
I.
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. Wiring shall be sized per speaker manufacturers
recommendations for optimal performance.
J.
Speaker-Line Matching Transformer Connections: Make initial connections using tap settings
indicated on Drawings.
K.
Connect wiring according to Division 26 Section " Low-Voltage Electrical Power Conductors
and Cables."
L.
Comply with requirements in Division 26 Section "Raceway and Boxes for Electrical Systems"
for installation of conduits and wireways.
M.
Install manufactured conduit sweeps and long-radius elbows whenever possible.
N.
Comply with NECA 1.
3.2
GROUNDING
A.
Ground cable shields and equipment to eliminate shock hazard and to minimize ground loops,
common-mode returns, noise pickup, cross talk, and other impairments.
B.
Signal Ground Terminal: Locate at main equipment cabinet. Isolate from power system and
equipment grounding.
C.
Install grounding electrodes as specified in Division 26 Section "Grounding and Bonding for
Electrical Systems."
3.3
FIELD QUALITY CONTROL
A.
Manufacturer's Field Service:
Engage a factory-authorized service representative to
inspect, test, and adjust field-assembled components and equipment installation, including
connections, and to assist in field testing. Report results in writing.
B.
Perform the following field tests and inspections and prepare test reports:
1.
2.
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.
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3.
4.
Operational Test: Perform tests that include originating program and page messages at
microphone outlets, preamplifier program 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.
b.
c.
5.
6.
7.
8.
P.N. 230071
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.
Repeat test for each separately controlled zone of loudspeakers.
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 26 Section
"Grounding and Bonding for Electrical Systems."
C.
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.
D.
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.
E.
Public address systems will be considered defective if they do not pass tests and inspections.
F.
Prepare test and inspection reports.
1.
3.4
Include a record of final speaker-line matching transformer-tap settings, and signal
ground-resistance measurement certified by Installer.
STARTUP SERVICE
A.
Engage a factory-authorized service representative to perform startup service.
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P.N. 230071
B.
Verify that electrical wiring installation complies with manufacturer's submittal and installation
requirements.
C.
Complete installation and startup checks according to manufacturer's written instructions.
3.5
ADJUSTING
A.
On-Site Assistance: Engage a factory-authorized service representative to provide on-site
assistance in adjusting sound levels, resetting transformer taps, pre-set programming and
adjusting controls to meet occupancy conditions.
B.
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
DEMONSTRATION
A.
Engage a factory-authorized service representative to train Government's maintenance
personnel to adjust, operate, and maintain public address and music equipment. Refer to
Division 01 Section "Closeout Procedures."
END OF SECTION
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