SECTION 16770

PUBLIC ADDRESS SYSTEM

PART 1 GENERAL

SECTION INCLUDES

Amplifier and control equipment.

Input equipment.

Reproducer equipment.

[Communications cable].

RELATED SECTIONS

Section 16120 - Wire and Cable: Communications cable.

SYSTEM DESCRIPTION

Public address system for voice [and music] with [turntable] [, cassette tape player] [, reel-to-reel tape player] [, [AM/]FM tuner] [, microphone] [, interface to telephone system] [, [_______]] [, one-way paging [by zone]] [, emergency paging override] [, distribution of background music] [and] [selective speaker talkback].

SUBMITTALS

Submit under provisions of Section [01300] [_____].

Shop Drawings: Indicate layout of equipment mounted in racks and cabinets, component interconnecting wiring, and wiring diagrams of field wiring to speakers and remote input devices.

Product Data: Provide for components and accessories.

Manufacturer's Instructions:	Indicate application conditions and limitations of use stipulated by Product testing agency specified under Article REGULATORY REQUIREMENTS.

Manufacturer's Instructions:	Include instructions for storage, handling, protection, examination, preparation, installation, and starting of product.

Manufacturer's Certificate: Certify that products meet or exceed specified requirements.

Manufacturer's Field Reports: Submit under provisions of Section [01400] [_____].

Manufacturer's Field Reports: Indicate that installation is complete and system performs according to specified requirements.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700] [_____].

Accurately record actual locations of speakers, control equipment, and outlets for input/output connectors.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700] [_____].

Operation Data: Include instructions for adjusting, operating, and extending the system.

Maintenance Data: Include repair procedures and spare parts documentation.

QUALIFICATIONS

Manufacturer: Company specializing in public address systems with [three] [_____] years experience.

Supplier: [Authorized] [Franchised] distributor of amplifier/control equipment manufacturer.

Installer: [Authorized] [Franchised] installer of amplifier/control equipment manufacturer with [three] [_____] years experience and service facilities within [100] [___] miles of Project.

REGULATORY REQUIREMENTS

Conform to requirements of ANSI/NFPA 70.

Furnish products listed and classified by [Underwriters Laboratories, Inc.] [testing firm acceptable to authority having jurisdiction] as suitable for purpose specified and shown.

Conform to requirements of Federal Communications Commission.

MAINTENANCE SERVICE

Furnish service and maintenance of public address system for [one year] [__________] from Date of Substantial Completion.

PART 2 PRODUCTS

AMPLIFICATION/CONTROL EQUIPMENT

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Microphone Inputs: [Provide [two] [_____] low impedance inputs with [600] [___] microvolt sensitivity and noise level at least [55] [___] dB below rated output] [__________].

Auxiliary Inputs: [Provide [one] [_____] high impedance input with [0.4] [___] volt sensitivity and noise level at least [70] [___] 6 dB below rated output] [____________].

System Frequency Response: [50 - 15,000] [__________] Hz., + [2] [___] dB.

System Distortion: Less than [1.5] [___] percent, [100 to 100,000] [_______________] Hz. at rated power] [_______________].

System Output Power: [_______] rms Watts.

System Output: [4 ohms] [8 ohms] [16 ohms] [25 volts] [70.7 volts].

Volume Controls:	Provide one for each input and one master volume.

Bass Control: [+8 dB to -12 dB at 50 Hz] [_____________].

Treble Control: [+8 dB to -12 dB at 10,000 Hz] [_______________].

Program Selector: Provide program [, listen-talk,] and mode selector switches.

System Cabinet: [Rack mounted] [Console mounted] [Enamel finished freestanding metal] [Wall mounted] [_______________].

RECORD TURNTABLE

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description: Automatic turntable.

Input Voltage:	120 volts AC.

Turntable Speed: 33-1/3, 45 [and 78] rpm.

Cartridge:	[Ceramic high-impedance stereo] [__________].

Stylus: [Diamond] [__________].

Operating Controls: Speed selector, cue control, stylus pressure adjustment, and manual record size selector.

Component Mounting: [Rack] [Console] [Wall].

[AM/]FM TUNER

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	Tuner with [525 - 1605 kHz AM and] 88 - 108 MHz FM tuning range.

AM IF Rejection: [Over 30 dB] [__________].

AM Selectivity: [7 kHz at - 6 dB] [__________].

AM Fidelity: [100 - 4500 Hz, + 3 dB] [________________].

AM Antenna Input: 75 ohms, unbalanced.

FM IF Rejection: [Over 50 dB] [_______________].

FM Fidelity: [50 - 15,000 Hz, + 3 dB. [_______________].

FM Antenna Input: 300 ohms, balanced.

TAPE PLAYER

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[Cassette player] [Reel-to-reel tape player].

Tape Speed (Play): [1-7/8] [3-3/4] [7-1/2] [15] inch per second.

Crosstalk:	[45 dB minimum] [_______________].

Response: [100 - 7000 Hz, + 3 dB] [___________________].

Signal/Noise Ratio: [Less than 60 dB] [_______________].

Speed Accuracy: [+3, -2] [_______] percent.

Wow and Flutter:	[Less than 0.35] [___________________] percent rms.

Fast Forward Time: [135] [_____] seconds maximum, with 60 minute cassette.

Rewind Time:	[90] [_____] seconds maximum, with 60 minute cassette.

ACCESSORIES

Microphone:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[Desk type low impedance microphone with push-to-talk switch] [______________________________].

Speaker:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[[8] [___] inch ([100] [___] mm) coaxial speaker with integral crossover circuit] [_______________].

Power Rating: [20] [_____] Watts.

Frequency Range: [45 - 18,000 Hz] [_______________].

Sound Pressure Level: [95] [___] dB at 3 feet (0.9 M) with one Watt input.

Magnet: [Ceramic] [Alnico]; [10] [___] ounces ([283] [___] g) low frequency unit; [3] [___] ounces ([85] [___] g) high frequency unit.

Dispersion:	[-3 dB at 90 degrees, -5 dB at 110 degrees] [_________________________].

Speaker Backbox: Insulated with sound-deadening material.

Baffles and Enclosures:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[12] [___] inch ([305] [_____] mm) [square] [round], [painted steel] [molded plastic] [___], [white] [_____] finish with [uniform perforations] [_________________________].

Horns:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[Wide dispersion indoor/outdoor horn with driver] [_____].

Power Rating: [60] [_____] Watts.

Low Frequency Cutoff: [250] [_____] Hz.

Sound Distribution: [20 x 50] [_______] degrees.

Sound Pressure Level: [120] [___] dB at 4 feet (1.2 with full range input.

10.	Material: [Cast aluminum] [Fiberglass]. 11. Finish: [_________________________].

Matching Transformers:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[Tapped from [0.5 to 4] [_______________] Watts in [one] [___] Watt steps, with primary/secondary ratio to match amplifier to speaker impedances] [______________________________].

Volume Pads:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[Transformer type rated [10] [30] Watts] [______________________________].

Telephone Interface:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description: [600 ohm - auxiliary input] [__________].

Equipment Rack:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description: [Floor] [Wall] mounted equipment rack.

Equipment Mounting Width: 19 inch (483 mm).

Equipment Mounting Height: [___] inches ([_____] mm) minimum.

Finish: [Gray] [_____] enamel finish.

Include [front and] rear hinged and latched door. 10. Include [six] [___] receptacle multioutlet assembly inside rack.

Antenna:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description: Folded dipole FM antenna.

Impedance:	300 ohm.

Construction: Use tubular metal elements.

Wind Resistance: Withstand [100] [_____] mph wind.

Microphone Cord:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[20 AWG stranded copper conductor, 600 volt insulation, rated 60 degree C, two conductor shielded cable with rubber jacket] [_______________].

Input Cable:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[22 AWG copper conductor, 300 volt insulation, rated [60] [___] degrees C, paired conductors twisted together, shielded, and covered with a PVC jacket] [______________________________].

Speaker Wire and Cable:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[22 AWG copper conductor, 300 volt insulation, rated [60 ] [___] degrees C, paired conductors twisted together [, shielded,] and covered with a PVC jacket] [______________________________].

Plenum Cable for Speaker Circuits:

[_________________________] Model [__________].

[_________________________] Model [__________].

[_________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description:	[22 AWG copper conductor, 300 volt insulation, rated 200 degrees C, paired conductors twisted together [, shielded,] and covered with a nonmetallic jacket; suitable for use for Class 2 circuits in air handling ducts, hollow spaces used as ducts, and plenums.

PART 3 EXECUTION

INSTALLATION

Install equipment in accordance with manufacturer's instructions.

Splice cable only in accessible junction boxes or at terminal block units.

Make cable shields continuous at splices and connect speaker circuit shield to equipment ground only at amplifier.

Install input circuits in separate cables and raceways from output circuits.

Leave [12] [___] inches ([300] [___] mm) excess cable at each termination at microphone, volume pad, speaker, and other system outlet.

Leave [6] [___] feet ([2] [___] M) excess cable at each termination at system cabinet

Provide protection for exposed cables where subject to damage.

Use armored cable for outside speaker circuits.

Support cables above accessible ceilings to keep them from resting on ceiling tiles. Use spring metal clips or plastic cable ties to support cables from structure [or ceiling suspension system]. Include bridle rings or drive rings.

Use suitable cable fittings and connectors.

Connect reproducers to amplifier with matching transformers.

Install system cabinets in locations shown; arrange to provide adequate ventilation and access.

INTERFACE WITH OTHER PRODUCTS

Coordinate locations of outlet boxes provided under Section 16130 to obtain mounting heights [specified and] indicated on Drawings.

Install wall-mounted speaker [_____] feet ([_____] m) above finished floor.

Install volume pad outlets [_____] feet ([_____] m) above finished floor.

Connect equipment and accessories to communications cable provided under Section 16120.

MANUFACTURER'S FIELD SERVICES

Provide manufacturer's field services under provisions of Section [01400] [_____].

Include [making] [supervising] final wiring connections, inspection and adjusting of completed installation, and systems demonstration.

Certify that installation is complete and performs according to specified requirements.

FIELD QUALITY CONTROL

Measure and record sound power levels at designated locations.

ADJUSTING

Adjust transformer taps for appropriate sound level.

Adjust devices and wall plates to be flush and level.

Adjust [_______________________________________________].

DEMONSTRATION

Demonstrate system to designated Owner personnel under provisions of Section [01700] [_____].

Conduct walking tour of Project.	Briefly describe function, operation, and maintenance of each component.

Provide detailed operation and maintenance instruction and training.

Provide [local classroom facilities] [travel expense to manufacturer's training facility for Owner personnel].

Use submitted operation and maintenance manual as reference during demonstration and training.

END OF SECTION