TOA | FB-3862CU-AM | manual | TOA FB-3862CU-AM User manual

TOA FB-3862CU-AM User manual
INSTRUCTION MANUAL
IN-CEILING SUBWOOFER
FB-3862CU-AM
TABLE OF CONTENTS
1. SAFETY PRECAUTIONS ......................................................................................................................
2. GENERAL DESCRIPTION ....................................................................................................................
3. FEATURES ...........................................................................................................................................
4. NOMENCLATURE AND DIMENSIONS ...............................................................................................
5. SYSTEM EXAMPLE ..............................................................................................................................
6. INSTALLATION .....................................................................................................................................
7. WIRING .................................................................................................................................................
8. CABLE CONNECTION TO TERMINAL CONNECTOR ........................................................................
9. SPEAKER INSTALLATION ...................................................................................................................
10. REMOVING THE SPEAKER FOR MAINTENANCE ...........................................................................
11. SPECIFICATIONS ...............................................................................................................................
Thank you for purchasing TOA’s In-Ceiling Subwoofer.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
TOA Corporation
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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.
 Leave the installations 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 injuries.
 Attach the safety wire to the unit. If not attached, 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 push speaker surface when installation unit to
ceiling. Resulting in unit damage.
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 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
electrical 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.
TOA Corporation
2. GENERAL DESCRIPTION
The FB-3862CU-AM is a flush-mount ceiling subwoofer assembly for low frequency enhancement of distributed
loudspeaker systems. A 60W 70/100V transformer is included, and the bandpass design eliminates the need for a
bi-amplified system. The FB-3862CU-AM has low impedance (8Ω) bypass that is suited to applications that include
electronic crossovers and dedicated low impedance power amplifiers.
3. FEATURES
• 8" long excursion low frequency driver for great bass response.
• 100W continuous, 200W peak power handling.
• Transformer taps for 70V,100V and Low Impedance (8Ω) Bypass accessible behind the grille.
• UL1480A UEAY/UEAY7 certified for general signaling, and suitable for use in air-handling spaces.
• The mounting C-ring, tile rails and cutout template sheet are included.
• Removable grille for custom painting.
• Service eyebolts for safety wire installation.
4. NOMENCLATURE AND DIMENSIONS
Unit:mm (inches)
Mounting tab
Front grille
Connector cover
Mounting tab
Choke bracket
[ Ceiling mounting ]
Tile rails
Ceiling tile
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5. SYSTEM EXAMPLE
Example 1- 70V system (one power amplifier)
FB-3862CU-AM
Example 2- Bi-amplified mono 70V system
FB-3862CU-AM
Example 3- Bi-amplified stereo low impedance system
FB-3862CU-AM
FB-3862CU-AM
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6. INSTALLATION
[Installation view on Drop Ceilings]
Ceiling
Speaker unit
This speaker must be installed in accordance with local building codes using support and safety cables attached
to building structure. Failure to properly install these support and safety cables can lead to serious injury to persons
or property. Always use load rated stranded steel cable or equal for support and safety cables. Place the supplied
tile rails above the ceiling with the edge triangle parts are catching the T-grids in case the ceiling tile accidentally
falls off.
Prior to installation-
make sure that you have all the components from the carton, plus safety cables
and attachment hardware (not included). There are two separate cartons (shipped together) that contain the
loudspeaker assembly and mounting accessoriesFB-3862CU-AM loudspeaker with grill
Installation cutout template
Support (“C”)ring
Support rails (qty 2) in a separate box
Tile rail (accessory)
T-grid
Ceiling
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[Installation Procedures]
Step 1. Place the tile that will be used for the speaker finished side down on a clean flat surface. Using the
template, cut a Ø 350mm (13.8”) diameter hole.
Φ350±5(13.8")
Ceiling tile
Step 2. Install mounting hardware on the ceiling.
2-1. Place the supplied tile rails on the 2-foot tile as shown below.
Tile rails (accessory)
2-foot tile
T-grid
2-2.
Place the support ring over the hole. Insert the tile supports into the C-ring grooves. Adjust the position of
the assembly as required, then fix the tile rails to the support ring using the provided screws.
Tile rails (accessory)
2-foot tile
C-ring
T-grid
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Step 3. Attach a safety wire from the speaker to the building structure to prevent accidental fall.
Securely attach one end of the safety wire to the eye bolts located on the top of the speaker, and securely
attach the other end to stable building structure.
Building structure
Safety wire (not included)
2-foot tile
C-ring
Tile rails
Ceiling tile
T-grid
Safety wire (not included)
Speaker unit
Loosen four screws
7. WIRING
Step 1. Loosen the screws on the choke bracket
to allow the speaker cable to pass through.
Step 2. Loosen the screw on the connector cover plate
and rotate the plate to open.
Loosen the left
screw to open the
cover plate
Speaker cable(s)
Step 3. Put the speaker cable through the choke bracket.
Choke bracket
Step 4. Detach the removable terminal connector
then wire speaker cable by referring to page 8.
Step 5. Plug the wired removable terminal connector
back into the speaker’s socket.
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Step 6. Retighten the screws on the choke bracket
to fix the speaker cable not to be pulled off.
Retighten the screws
Step 7. Rotate the cover plate to close and fix it
by retightening the screw.
8. CABLE CONNECTION TO TERMINAL CONNECTOR
Recommended cable types
• Solid copper wire:
ø1.0 – ø2.0 mm (equivalent to AWG 18 – 12)
• Stranded copper wire:
0.8 – 3.3 mm2 (equivalent to AWG 18 – 12)
Step 1. Loosen the cover mounting screw, and rotate the
Cover plate in the direction indicated by the
arrow in the figure at right.
Cover mounting
screw
Cover plate
Speaker unit
Removable
input connector
Step 2. Detach the removable terminal connector from the
speaker's socket, and loosen the screws of the
terminal to insert wires.
Speaker unit
Step 3. Insert the stripped cable end into the terminal and tighten the terminal screws with a screwdriver.
[If not bridging]
Note
If not making bridge connections,
be sure to tighten unused terminal
screws to avoid their vibration.
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[If bridging]
9. SPEAKER INSTALLATION
Step 1. Remove the front grille.
Turn the mounting tabs out and push them
up towards the grille so that the grille comes off.
Mounting tab
Step 2. Insert the speaker through the mounting hole till it
contacts the ceiling panel.
Mounting
hole
Speaker
unit
Step 3. 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.
Mounting tab
Mounting tab
axis screw
Use an electric screwdriver to tighten.
(Tightening torque:6 – 10 kgf ·cm)
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Step 4 . Set the input power.
Adjust the loudspeaker tap using the 70V range until an acceptable
balance between high/mid loudspeakers and the FB-3862CU-AM is
achieved. (Factory-preset: 30W@70.7 Volt)
Note
Setting position “Low-Z” can be used in UL1480A Category
UEAY and CAN/CSA C22.2 No.205 Category UEAY7.
CAUTION
Do not use the Low-Z setting with an amplifier that is designed for use with a 70V system. Damage to the
amplifier and/or speaker may occur. If you are installing the FB-3862CU-AM as part of a bi-amplified
system (electronics crossover feeding high/mid and low frequency amplifier channels) with low impedance
amplifiers (4Ω or 8Ω outputs), use the Low-Z direct setting. A high pass filter set at 40Hz and low pass filter
set at 100Hz will help protect the FB-3862CU-AM from extreme low frequencies and provide an
omnidirectional low frequency source.
Step 5 . Attach the front grill.
Push the grille up with the edge slides into the slit of the speaker till it gets flat to the speaker frame.
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10. REMOVING THE SPEAKER FOR MAINTENANCE
Step 1. Remove the front grill
Find the small gap (see illustration) on the front grill, then use a small flat screwdriver to remove
the front grill.
Caution
The width of the gap is less than 9mm.
Small gap
Step 2. Loosen the mounting tab
Screw
Mounting
tab
Mounting tab
axis screw
Use an electric screwdriver to detach.
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.
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11. SPECIFICATIONS
Enclosure
Bandpass
Rated Input
60W (70/100V)
Power Handling Capacity
100W RMS 200W Peak (Low-impedance)
Impedance
70V line- 60W/30W/15W/7.5W/3.8W/1.9W with Low Impedance (8Ω)
bypass
Sensitivity
91dB 1W/1m
Frequency Response
45-200 Hz (-10dB)
Speaker Component
8” driver with oiled paper cone and foam surround
Certifications
UL2043/UL1480A/CSA C22.2 No. 205, Baffle meets UL 94-V0, RoHS
compliant.
Mounting Hole
350mm diameter(13.8”)
Input Terminal
Phoenix-type with bridging outputs (max 12AWG stranded cable)
Recommended Cable
Max 12AWG stranded unshielded twisted pair (jacket per code)
Finish
White
Dimensions
383mm diameter x 326.5 mm height
Weight
6.71 kg (14.79 lb)
Included Accessories
Steel support ring (C-ring), qty 1
steel support rails, qty 2
speaker hole template, qty 1
operation manual,qty 1
Optional Accessories
Support and safety cables (load rated chain or load rated aircraft cable)
Note: T he design and specifications are subject to change without notice for improvement
TOA Corporation
133020045500
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