Vizio Speaker FB 120B User Manual

OPERATING INSTRUCTIONS  
SUBWOOFER SYSTEM  
FB-120B  
FB-120W  
Thank you for purchasing TOA's Subwoofer System.  
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.  
1. SAFETY PRECAUTIONS  
• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.  
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions  
regarding safety.  
• After reading, keep this manual handy for future reference.  
Indicates a potentially hazardous situation which, if mishandled, could result  
in death or serious personal injury.  
WARNING  
Indicates a potentially hazardous situation which, if mishandled, could result  
CAUTION  
in moderate or minor personal injury, and/or property damage.  
• Use nuts and bolts that are appropriate for the ceiling's  
structure and composition. Failure to do so may cause  
the speaker to fall, resulting in material damage and  
possible personal injury.  
WARNING  
• Refer all installation work to the dealer from whom the  
• Tighten each nut and bolt securely. Ensure that the  
bracket has no loose joints after installation to prevent  
accidents that could result in personal injury.  
speaker was purchased. Installation for flying requires  
extensive technical knowledge and experience. The  
speaker may fall off if incorrectly installed, resulting in  
possible personal injury.  
• Do not mount the unit in locations exposed to constant  
vibration. The mounting bracket can be damaged by  
excessive vibration, potentially causing the unit to fall,  
which could result in personal injury.  
• Flying Precautions  
Be sure to follow the instructions below. Otherwise, the  
suspension wires or belts may be off or snap and the  
speaker may fall off, causing personal injury.  
• Check to confirm that the suspension wires and belts are  
strong enough to withstand the speaker load.  
CAUTION  
• Avoid touching the unit's sharp metal edge to prevent  
• The connectors of the suspension wires and belts must  
be securely linked with those of the speaker.  
injury.  
• All parts and components (such as enclosures, metal  
pieces, and screws) must be free from any deformation,  
crack, and corrosion.  
• To avoid electric shocks, be sure to switch off the  
amplifier's power when connecting speakers.  
• Do not place heavy objects on the unit as this may cause  
it to fall or break which may result in personal injury  
and/or property damage. In addition, the object itself may  
fall off and cause injury and/or damage.  
Be sure to use screws supplied with the optional flying  
hardware when installing the speaker using such hardware.  
• Install the unit only in a location that can structurally  
support the weight of the unit and the mounting bracket.  
Doing otherwise may result in the unit falling down and  
causing personal injury and/or property damage.  
• 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.  
• Since the unit is designed for in-door use, do not install it  
outdoors. If installed outdoors, the aging of parts causes  
the unit to fall off, resulting in personal injury.  
• Do not stand or sit on, nor hang down from the unit as  
this may cause it to fall down or drop, resulting in  
personal injury and/or property damage.  
• Owing to the unit's size and weight, be sure that at least  
two persons are available to install the unit. Failure to do  
so could result in personal injury.  
• Have the unit checked periodically by the shop from  
where it was purchased. Failure to do so may result in  
corrosion or damage to the unit or its mounting bracket  
that could cause the unit to fall, possibly causing  
personal injury.  
• Do not use other methods than specified to install the  
unit. Extreme force is applied to the unit and the unit  
could fall off, possibly resulting in personal injuries.  
 
First speaker  
Second speaker  
Two speaker systems can be operated in parallel by connecting them in a  
cascade configuration as shown at right.  
Note  
Be sure to connect the speaker system to the power amplifier's output  
terminal of 4 or less.  
Connecting it to an output terminal of over 4 may cause amplifier failure.  
6. INSTALLATION  
6.1. Installation Location and Acoustic Energy  
Acoustic energy emitted from the speaker differs depending on installation locations.  
The figures below show that the acoustic energy increases in other installation locations, referenced to the free sound field  
(ceiling suspension).  
2 π space: +6 dB  
(Semi-free sound field)  
4 π space: +0 dB  
(Free sound field)  
π/2 space: +18 dB  
(1/8 free sound field)  
π space: +12 dB  
(1/4 free sound field)  
6.2. Suspended Installation  
Be sure to select wire, chain, and/or anchor shackles with a safety factor  
appropriate to the weight of the speaker system. Incorrect selection of these  
suspension components may cause the speaker system to fall, potentially  
resulting in damage and/or personal injury.  
WARNING  
Remove the 4 screws on both sides of the subwoofer system, screw 30 50 mm (1 3/16" 1 31/32") M8 eyebolts into the  
exposed holes, and use these to suspend the subwoofer using wire or chain.  
Note  
Eyebolts, nuts, and washers are not supplied and should be acquired separately.  
Remove the 4 preinstalled  
screws on both sides.  
M8 eyebolt  
(30 50 mm or 1 3/16" 1 31/32" long)  
Use the optional HY-PF1B or HY-PF1W Speaker Rigging Frame to suspend the FB-120 subwoofer together in the same  
location with TOA HX-5 series speakers.  
For suspension, refer to the instruction manual attached to the HY-PF1B or HY-PF1W.  
 
7. COMBINING THE FB-120 WITH FULL-RANGE SPEAKERS  
7.1. Crossover Settings  
The subwoofer system already possesses the characteristic of suppressing sound in the mid- to high-frequency range, but  
a low-pass filter can also be added to eliminate unwanted mid- and high-frequency components even further for even  
greater efficiency. When using a digital signal processor as a low-pass filter, the filter settings shown below are  
recommended.  
Filter  
(12 dB/oct)  
LPF BW (24 dB/oct)  
Frequency  
40 Hz  
Q
HPF  
2.053  
100 Hz  
7.2. Level Balance & Polarity  
When using the FB-120 series in conjunction with full-range speakers (such as those in TOA's HX-5 series), adjust the  
level balance and polarity for each speaker independently depending on the installation site.  
7.2.1. Level balance adjustment  
Increase or decrease the level of the subwoofer (or full range speaker) as appropriate to the number of units and  
installation conditions.  
7.2.2. Polarity adjustment  
If the subwoofer and full-range speakers are in phase in their crossover band, then acoustic energy is added; however,  
acoustic energy is subtracted if the two are in reversed phase. Since the phase characteristics of both the subwoofer  
and full-range speaker change continuously depending on the frequency, it may not be ideal to follow the subwoofer's  
polarity instructions when connecting it.  
Compare the degree to which acoustic energy increases by switching the polarity of the connection at the subwoofer  
(from positive to negative and from negative to positive). Choose the way of connection that results in the greatest  
increase in acoustic energy. To match the polarity correctly, make actual measurements of acoustic energy using a real  
time spectrum analyzer.  
8. SPECIFICATIONS  
Model No.  
FB-120B  
FB-120W  
Power Handling Capacity  
Impedance  
Continuous pink noise: 200 W, Continuous program: 600 W  
8 Ω  
Sensitivity  
90 dB (1 W, 1 m) at installation in free sound field  
96 dB (1 W, 1 m) at installation in 1/2 free sound field  
Frequency Response  
Speaker Component  
Input Terminal  
40 to 1,200 Hz (10 dB)  
30 cm (12") cone-type  
Speakon NL4MP x 2 and M4 screw terminals,  
distance between barriers: 11 mm  
Finish  
Enclosure:  
Punched net: Steel plate, black, paint  
408 (w) x 408 (h) x 450 (d) mm  
Wood  
Enclosure:  
Punched net: Steel plate, white, paint  
Wood  
Dimensions  
Weight  
16 1/16 (w) x 16 1/16 (h) x 17 23/32 (d) inches  
15 kg  
Note: The design and specifications are subject to change without notice for improvement.  
• Optional products  
Speaker rigging frame: HY-PF1B (black), HY-PF1W (white)  
Printed in Indonesia  
533-06-126-60  
 

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