Toa F-2852C2 User manual

INSTRUCTION MANUAL
CEILING SPEAKER SYSTEM F-2852C2
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
TABLE OF CONTENTS
1. SAFETY PRECAUTIONS ................................................. 2
2. GENERAL DESCRIPTION ............................................... 3
3. FEATURES ....................................................................... 3
4. NOMENCLATURE AND DIMENSIONS ........................... 4
5. INSTALLATION ................................................................ 5
6. REMOVING THE SPEAKER
FOR MAINTENANCE ...................................................... 10
7. REPAINTING THE SPEAKER ........................................ 11
8. ABOUT THE INPUT OVERLOAD
PROTECTION CIRCUITRY ............................................. 11
9. SPECIFICATIONS ........................................................... 12
Accessories ..................................................................... 12

• Leave the installation to your TOA dealer because
the installation requires expert knowledge.
Improper installation may cause the unit to fall,
resulting in personal injury and/or property
damage.
• Install the unit in a location that can structurally
support the weight of the unit and its mounting
hardware. Doing otherwise may result in the unit
falling down and causing personal injury and/or
property damage.
• Do not use other methods than specified to mount
the unit. Extreme force is applied to the unit and
the unit could fall off, possibly resulting in personal
injuries.
• Attach the safety wire to the unit. If not attached,
the unit could fall off, resulting in personal injury.
• Tighten each screw securely. Ensure that the unit
has no loose joints after installation to prevent
accidents that could result in personal injury.
• Do not hold the tweeter as a handle to carry the
unit. If the tweeter breaks off, the unit falls off,
resulting in possible personal injury.
• Use the specified mounting hardware in
combination. Doing otherwise may cause the unit
or component to fall off, resulting in personal injury.
• Should the following irregularity be found during
use, immediately stop operating the unit and
contact your nearest TOA dealer. Further attempt
to use under this condition may cause fire or
electric shock.
· If you detect smoke or a strange smell coming
from the unit
· If no tone sounds
• Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
• Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
• Avoid touching the unit's sharp metal edge to
prevent injury.
2
CAUTION
1. SAFETY PRECAUTIONS
• Be sure to read the instructions in this section carefully before use.
• Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
• We also recommend you keep this instruction manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.
WARNING
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
WARNING
CAUTION

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2. GENERAL DESCRIPTION
The F-2852C2 is a 2-way, flush-mounted Ceiling Speaker System that offers a wide frequency range and
high-quality sound output.
It is specifically designed to be mounted to a drop ceiling with use of the supplied tile bridge.
3. FEATURES
• Two-way, bass-reflex speaker system designed to provide a wide frequency range and high power handling
capability.
• Ideal for locations that have high ceilings or require true-to-life sounds.
• Uniform sound output levels are achievable not only in the position directly under the speaker, but also over
a wide radius. (Coverage angle is approximately 110°.)
• Because the speaker is provided with both low- and high-impedance operating capability, it can be used in
many different applications. Front panel-mounted input selector switch permits easy verification and change
of current impedance settings, even after installation.
• Easy installation. Can be quickly and accurately mounted to ceilings and walls.
• Rotating front grille can be installed quickly and conveniently.
• Attractive exterior design specially created by an interior designer blends naturally with any architectural
space, enhancing the immediate area's sense of harmony.

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4. NOMENCLATURE AND DIMENSIONS
[Front]
ø280 (11 1/32)
38 (1 1/2)
227 (8 15/16)
ø245 (9 41/64)
[Side]
Removable input connectorSafety wire hook
[Rear]
[Ceiling mounting]
Ceiling tile
Tile bridge
(accessory)
Mounting hole: ø250 (9 27/32)
Max. 37 (1 29/64)
Max. 200 (7 7/8)
Front grille (accessory)
Safety wire (accessory)
Unit: mm (inches)
Approx. 600 (235/8)
Cord clamp

5
5. INSTALLATION
Before mounting the speaker, check the ceiling structure is of drop ceiling with 2-foot standard ceiling tiles.
[Installation view on Drop Ceilings]
Caution
Set the tile bridge so that both ends fit securely into the T-grids, even if the ceiling tile accidentally falls off.
Ceiling tileT-grid
Tile bridge (accessory)
ø250 ±5 mm (9 27/32 ±13/64")
Ceiling tile
[Installation procedures]
Step 1. Cut a ø250 mm (9 27/32") hole in the ceiling.
Use the supplied paper pattern to position and trace the hole.
Step 2. Place the supplied tile bridge on the 2-foot tile as shown below.
T-grid
2-foot tile
Tile bridge (accessory)

6
Step 3. Attach a safety wire to prevent the speaker from accidentally falling.
To attach, tie one end of the supplied safety wire around the speaker's safety wire hook, and tie its
snap ring around a secure C-channel bar or suspension pipe.
2-foot tile
Safety wire (accessory)
Secure C-channel bar or
suspension pipe
Speaker unit
Ceiling tile
Safety wire (accessory)
Safety wire hook
T-grid
Tile bridge (accessory)

7
Removable input connector
Speaker unit
Step 4. Connect the speaker cable to the removable input connector.
Tip
The following matching cable types are recommended:
• Solid copper wire: ø0.5 – ø1.6 mm (equivalent to AWG 24 – 14)
• Stranded copper wire: 0.2 – 2.5 mm2(equivalent to AWG 24 – 14)
4-1. Detach the removable input connector from the speaker's wiring socket, and loosen the screw of the
terminal to be used.
4-2. Insert the stripped cable end into the terminal and tighten the terminal screw with a screwdriver.
Note
If not making bridge connections, be sure to tighten unused terminal screws to avoid their vibration.
5 mm (13/64")
From Amplifier
To the next speaker
[If bridging][If not bridging]

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Step 6. Mount the speaker.
Caution
Before mounting, check to be sure that the speaker's
4 mounting tabs are turned inside the unit as shown in
the figure.
If turned outward, the speaker cannot be inserted
through the mounting hole.
In
Out
Mounting tab
6-1. Insert the speaker through the mounting hole till it contacts the ceiling panel.
While doing so, avoid directly touching the speaker's diaphragm and tweeter.
WARNING
Never grab the tweeter section as a hand hold.
The speaker could fall due to damage, resulting
in possible personal injury.
Tweeter section
Tweeter section
Mounting hole
Step 5. Make speaker cable connection.
5-1. Plug the wired removable input connector into the speaker's wiring socket.
5-2. Fix the speaker cable with the cord clamp.
Speaker unit
Removable input
connector
Cord clamp
Cord clamp
Speaker cable
Clamp fixing screw (2 pieces)
Loosen the cord clamp fixing screws and open the cord clamp.
Then, pass the speaker cable between both screws.
Tighten the clamp fixing screws to
fix the speaker cable with the cord clamp.
Confirm the connector will not pull out.
Pull on the cable here to confirm that
speaker cable is securely fixed. Removable input connector
5 -1
5-2

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6-2. Rotate and tighten the mounting tab axis screws (4 places) on the unit clockwise to their full stop in
order to grip the ceiling panel with the mounting tabs.
Speaker's front
Slotted screwdriver
Input selector switch
Mounting tab axis screw
Mounting tab
Use an electric screwdriver to tighten.
(Tightening torque: 6 – 10 kgf·cm)
Front grille
(accessory)
Tab (4 places)
Notch (4 places)
Speaker
unit
LOCK
Step 8. Attach the front grille.
Align the tabs (4 places) on the back side of the
grille with the corresponding notches in the unit,
then rotate the grille to full stop in the direction
indicated by the "LOCK" arrow.
Tip
The front grille employs a double-locking system
that clicks into place once partway through
rotation, but only locks into position at its point of
full rotation. Always be sure to rotate the grille to
its full stop.
Important
Never set this switch to low impedance (8 Ωor 16 Ω) when using a high impedance 25, 70, or 100 V
line. Failure to follow this instruction could result in damage to the speaker or amplifier.
Step 7. Set the input power.
Turn the input selector switch (on the unit's front) to set it to the desired input impedance using a
slotted screwdriver.
Note: The switch is factory-preset to 170 Ω.

10
Mounting tab axis screw
Use an electric screwdriver to detach.
Mounting tab
Screw cap
Caution
Be sure to set the screwdriver's torque for under 4 kgf·cm.
Failure to do so may cause the Screw cap and the Mounting tab to fall off
on the rear of ceiling panel.
6. REMOVING THE SPEAKER FOR MAINTENANCE
6.1. Detaching the Front Grille
Turn the front grille counterclockwise to full stop, then lightly
pull it downward.
Tip
The front grille employs a double-locking system.
If the grille cannot be detached when lightly pulled downward,
it likely has not yet been fully rotated back to the detachment
position. In such cases, take care to rotate the grill fully
counterclockwise in order to release the lock.
1
2
Front grille
Unlock
Pull lightly.
6.2. Removing the Speaker
Rotate the 4 mounting tab axis screws counterclockwise. The mounting tabs rise as they turn, allowing the
speaker to be removed.
Caution
When loosening the mounting tab axis screws, support the speaker by hand to prevent it from falling.

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7. REPAINTING THE SPEAKER
Follow the procedure below when repainting the front grille:
Step 1. Clean the front grille before painting.
Wipe with a soft cloth dampened in a detergent.
Caution
Do not use thinner or other volatile liquids to clean the grille.
Step 2. Spray on a uniform, thin coat of paint.
Cautions
• Avoid painting with a roller or brush, as the grille mesh holes could become clogged with paint.
• Use appropriate spray paints for the front grille (grille and frame) materials.
Grille: Rolled steel plate
Frame: Fire-resistant ABS resin (acrylic paint)
• Be sure to follow the directions indicated on the paint when painting.
Step 3. After the paint has dried, apply another light coat.
Caution
Repeating Step 2, apply two or more light coats of paint.
Application of one thick coat of paint all at once may cause drips or unevenness to show up in the
painted finish, or clog the mesh holes.
8. ABOUT THE INPUT OVERLOAD PROTECTION CIRCUITRY
The F-2852C2 features internal input overload protection circuitry. If an extremely high input level is fed to the
unit, the protection circuitry automatically cuts off the signal to the speaker element.
A drastic reduction in sound volume indicates that the protection circuitry has been enabled.
In such cases, simply reduce the amplifier volume. The protection circuitry will automatically reset in
approximately 10 seconds. After reset, try to maintain the volume at a level slightly lower than before.
Caution
This protection circuitry does not completely protect the unit against extremely high input power levels.
Depending on the type or duration of excessive power input, the protection circuitry might not be enabled,
resulting in damage to the speaker element. Also, if the excessive power input continues for a long period of
time, the circuitry may not be capable of resetting to its original condition.
Use the system with care so that the speakers are not exposed to excessive power input.

533-06-143-50
9. SPECIFICATIONS
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Front grille ............................................................ 1
Tile bridge ............................................................ 1
Safety wire (approx. 60 cm or 23 5/8") .................. 1
Paper pattern ....................................................... 1
Enclosure Bass reflex type
Rated Input 60 W (High Impedance)
Power Handling Capacity Continuous pink noise: 90 W (8 Ω), 60 W (16 Ω),
Continuous program: 180 W (8 Ω), 120 W (16 Ω)
Impedance 100 V line: 170 Ω(60 W), 330 Ω(30 W), 670 Ω(15 W), 3.3 kΩ(3 W)
70 V line: 83 Ω(60 W), 170 Ω(30 W), 330 Ω(15 W), 670 Ω(7.5 W), 3.3 kΩ(1.5 W)
25 V line: 83 Ω(7.5 W), 170 Ω(3.7 W), 330 Ω(1.9 W), 670 Ω(0.9 W), 3.3 kΩ(0.2 W)
16 Ω, 8 Ω
Sound Pressure Level 91 dB (1 W, 1 m)
Frequency Response 60 – 20,000 Hz (–10 dB), 45 – 20,000 Hz (–20 dB)
at installation in 1/2 free sound field
(Measured by installing the unit in the center of a ceiling.)
Speaker Component High frequency: Dome-type, Low frequency: 16 cm (6 1/2") cone-type
Mounting Hole ø250 mm (9 27/32")
Maximum ceiling thickness: 37 mm (1 29/64")
Input Terminal Removable locking connector with screw-down terminals
(2 input terminals and 2 bridge terminals)
Usable Cable Solid copper wire: ø0.5 – ø1.6 mm (equivalent to AWG 24 – 14)
Stranded copper wire: 0.2 – 2.5 mm2(equivalent AWG 24 – 14)
Finish Enclosure: Steel plate, plating
Baffle: Fire-resistant ABS resin (resin material grade: UL-94 V-0 or
its equivalent), black
Rim: Fire-resistant ABS resin (resin material grade: UL-94 V-0 or
its equivalent), white, paint
Punched net: Steel plate, white, paint
Dimensions ø280 mm (11 1/32") x Depth 227 mm (8 15/16")
Weight 5.8 kg (including mounting accessories)