Specifications

Chesapeake College Todd Performing Arts Center Auditorium
Audio System Upgrade
March 20
th
, 2015
Audio Systems 27 41 00-6
drawings. The Audio Systems contractor shall coordinate faceplate materials, colors,
and finishes with the faceplates used by other trades on the project and the architect
to match aesthetics.
d. Provide and install security covers on any electronics with front panel controls that
should not need to be adjusted after initial set-up. All components permanently
mounted to rack rail systems shall be installed with industry accepted security
screws.
e. All ceiling mounted Audio equipment shall be secured to building structure. Any
suspended equipment must be mounted with a safety factor of 8. Review existing
structure and provide proposed suspension method for line array loudspeakers with
licensed structural engineer. Include proposed suspension method in submittal
materials.
f. Steel cable security systems and padlocks to secure structure shall be provided for all
surface mount loudspeakers, and other exposed audio system components. All
padlocks provided for security shall be keyed to a single master key.
g. Provide intellectual property release and install an editable version of all master
source code for all digital signal processing, remote control or microprocessor-based
systems included on this project to an owner furnished personal computer. Also
provide a hardcopy on portable media.
h. Provide necessary analog and/or digital audio and control signal repeaters,
extenders, and amplifiers for any run greater than 30 feet and as needed to maintain
required signal levels for receipt at destination device. All audio lines shall be
balanced at the source, prior to any cable pull longer than 20 feet. There are no
exceptions.
i. For each input/output point of interface to the system, provide a suitable length
patch cord for owner use for every signal type present. Provide umbilical style cable
management for any mobile solutions.
2. Performance Standards: Unless restricted by the published specifications of a particular
piece of equipment, or unless otherwise required, the following minimum performance
standards shall be met by each system:
a. Analog Audio:
1) S/N (including crosstalk and hum): 75 dB minimum
2) Total Harmonic Distortion: 0.5% maximum from 30 Hz to 15,00Hz.
3) Frequency Response: Flat within +1.0 dB, 30 Hz to 15,000Hz.
b. Performance Test Signal Paths: The signal paths for the above Performance
Standards shall be as follows:
1) Audio: From any and all source inputs (for microphones, audiotape units, etc.)
through all audio processing, audio distribution amplifiers (ADA), mixers,
switchers, codec, etc., to all electrical signal destinations.
c. Remote Control Standards: As a minimum, the remote control system for each space
shall be programmed to include the following:
1) Owner Logo on first page.
2) Automatic System Shutdown.
3) AM/ PM Clock Settings.
4) 50 % audio level default.
5) Separate Program and Microphone Audio Level Control with mute function.
6) Volume/ Mute control for program and speech audio reinforcement on every
screen.
7) Panel layout to include user screens, as well as, password protected technician
pages.