Speakers

a.

Speaker installed in inmate

housing groups shall be [dual]

reentrant horn suitable for

voice announcements and area

monitoring in areas of high

ambient noise level. Speakers shall

be suitable for indoor [and

outdoor] use and shall conform to not

less than the following:

Continuous

[15]

[30]

Power Rating

(Watts)

Frequency

[275-14,000]

[225-14,000]

[250-14,000]

[225-14,000]

Response

(Hz)

Dispersion

[1.74 rad]

[2.09 by 1.04 rad]

[1.74 rad]

Dispersion [100 degrees] [100 degrees] [120 by 60 degrees] [100 degrees]

Sound Pressure at

1200 mm 4 Feet

on Axis with

Rated Inputs

(Decibels):

[121]

[125]

[123]

[121]

Impendance

Range (Ohms)

[45 to 5000]

[45 to 2400]

[45 to 2500]

Mounting:

[Universal

3 way ad-

justable]

Area Use:

[Indoor/

Outdoor]

b.

Speakers installed for large area public address systems shall be

loudspeaker reflex trumpet of weatherproof construction conforming

to not less than the following specifications:

(1)

Continuous power rating with driver:

[_____] watts

(2)

Frequency response:

[_____] Hz

(3) Dispersion angle: [85 degrees] [120 by 60 degrees] [1.48

rad] [2.09 by 1.04 rad]

(4) Sound pressure level input:

[_____] dB at 1200 mm 4 feet on

Axis with Rated Input

(5) Impedance range: [_____] Ohms [Manufacturer's standard for

40 watt audio power on 70 volt system]

(6)

Mounting:

Universal three-way adjustable

(7)

Area use:

Indoor/Outdoor

c.

Flush mounted speakers shall be mounted in acoustically treated

backbox and shall be provided with high impact square plastic

baffle attached to backbox with spanner head bolts. Speakers

shall conform to not less than the following:

SECTION 16822N

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