Specifications

Technology Upgrade Classroom Audio 28 5350-2
1224_01
4. Drop ceiling speaker shall be provided with a removable baffle assembly with a
backcan and safety tether.
5. Speaker shall have a 4 inch low frequency transducer and a 1 inch tweeter.
6. Power rating shall be 25 watts with multiple 70 volt taps.
7. Pressure sensitivity of at least 88 dB SPL at 1 meter.
8. Coaxial ceiling loudspeaker shall be Atlas Sound #FAP42T or equal.
9. Surface Mount speakers shall be Atlas sound #SM42T or equal.
PART 3 - EXECUTION
3.01 EXAMINATION
A. Location of the audio components shall be finalized in each classroom prior to installation
beginning.
3.02 PREPARATION
A. The contractor shall meet with the owner to determine the installation schedule for the
project. The owner will provide the contractor with dates when work can be completed in
each building.
B. Coordinate with the electrical contractor to ensure that they install the power outlet in the
ceiling at the projector mount. This shall be identified in each room prior to installation.
3.03 SITE REVIEW AND PLANNING
A. Classrooms have drop ceilings or open ceilings. Install the correct speaker type based on
the ceiling of each room.
B. All speaker cables shall route back to the teacher faceplate.
C. The contractor shall visit each classroom where the Audio/Video systems are to be installed
and shall also note any potential issues in each classroom that might impede the installation
of the audio/video components..
3.04 AUDIO ELECTRONICS INSTALLATION
A. The audio system shall be installed at the location shown on the drawings.
B. The system includes cabling, speakers, microphone and the mixer/amplifier,
C. Review the layout of the room and the existing lights and other items in the ceiling. Locate
the speakers to provide the best coverage of the room with audio.
D. Speaker cables shall be connected in series. One cable shall be used to connect the
mixer/amplifier to the first speaker and then to the other speakers as per the drawing.
Contact the manufacturer with questions about speaker and speaker cable connectivity.
E. Connect speaker wires and all audio inputs to the mixer/amplifier. Adjust all inputs, outputs
and audio controls to provide even sound between each input. Tune the system to provide
clear audio without feedback. Speakers shall be placed with the idea of limiting feedback.
F. When connecting speakers to the amplifiers, ensure the correct polarity throughout the
system.
G. Contractor shall label the volume control for each input. Labels shall be self-adhesive and
shall be laser printed. Provide a sample label to the owner for approval prior to installation...
All labels shall specify the device that dial controls. Handwritten labels are not allowed.
H. After connection of the system, the Contractor shall configure all components to ensure the
best sound possible.
I. Contractor shall test each and every input and output of the system. Contractor shall have
the Owner present for final testing and system checkout.
J. Connect the control system to the main output of the amplifier.
K. Mark the mixer for the optimal level and location each level control.