Toa FB-120W - User Manual

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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.

FB-120B

FB-120W

SUBWOOFER SYSTEM

OPERATING INSTRUCTIONS

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.

• Refer all installation work to the dealer from whom the

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.

• 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.

• The connectors of the suspension wires and belts must

be securely linked with those of the speaker.

• All parts and components (such as enclosures, metal

pieces, and screws) must be free from any deformation,

crack, and corrosion.

•

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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• Avoid touching the unit's sharp metal edge to prevent

injury.

• 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.

• 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.

• 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.

• 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.

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

WARNING

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Summary

6. Installation

6.1. Installation Location and Acoustic Energy

Discusses how installation location affects acoustic energy output for the speaker.

6.2. Suspended Installation

Details the process and safety precautions for suspending the speaker using wires or chains.

7. Combining the FB-120 with Full-Range Speakers

7.1. Crossover Settings

Recommended filter settings for low-pass filtering to enhance speaker performance.

7.2. Level Balance & Polarity

Adjusting subwoofer and full-range speaker level and polarity for optimal sound integration.

Summary

6. Installation

6.1. Installation Location and Acoustic Energy

Discusses how installation location affects acoustic energy output for the speaker.

6.2. Suspended Installation

Details the process and safety precautions for suspending the speaker using wires or chains.

7. Combining the FB-120 with Full-Range Speakers

7.1. Crossover Settings

Recommended filter settings for low-pass filtering to enhance speaker performance.

7.2. Level Balance & Polarity

Adjusting subwoofer and full-range speaker level and polarity for optimal sound integration.

Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features and Safety Precautions

The TOA FB-120B/W is a compact, indoor-use subwoofer system designed to enhance low-frequency sound reproduction. It is equipped with a high-power 30 cm (12") woofer and is intended for use in conjunction with TOA's HX-5 series or other full-range speakers. This subwoofer is suitable for both permanent and temporary installations, offering dynamic low-frequency sound.

Function Description:

The primary function of the FB-120B/W is to reproduce low-frequency sound, complementing full-range speaker systems. It is designed to integrate seamlessly with other TOA speaker series, particularly the HX-5, to create a more complete and impactful audio experience. The system inherently suppresses mid- to high-frequency ranges, but for even greater efficiency, a low-pass filter can be added using a digital signal processor. Recommended filter settings for optimal performance include an HPF (12 dB/oct) at 40 Hz with a Q of 2.053, and an LPF BW (24 dB/oct) at 100 Hz.

Important Technical Specifications:

Model Numbers: FB-120B (black) and FB-120W (white).
Power Handling Capacity:
- Continuous pink noise: 200 W
- Continuous program: 600 W
Impedance: 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: 40 to 1,200 Hz (-10 dB)
Speaker Component: 30 cm (12") cone-type woofer.
Input Terminal: Two Speakon NL4MP connectors and M4 screw terminals (distance between barriers: 11 mm). The Speakon connectors are internally connected in parallel to the screw terminals. The usable connector for the cable end is Speakon NL4FC.
Finish:
- Enclosure: Wood
- Punched net: Steel plate, black paint (FB-120B) or white paint (FB-120W).
Dimensions (W x H x D): 408 x 408 x 450 mm (16 1/16 x 16 1/16 x 17 23/32 inches).
Weight: 15 kg.

Usage Features:

Portability: Equipped with a convenient carrying handle for ease of transport.
Installation Flexibility: Can be suspended by wire or chain. For suspension, four M8 eyebolts (30-50 mm or 1 3/16" - 1 31/32" long) are screwed into exposed holes after removing the preinstalled screws on both sides. Eyebolts, nuts, and washers are not supplied and must be acquired separately.
Acoustic Energy Optimization: The acoustic energy emitted from the speaker varies depending on the installation location. The manual provides guidance on how acoustic energy increases in different installation locations, referenced to a free sound field (ceiling suspension):
- 4π space (Free sound field): +0 dB
- 2π space (Semi-free sound field): +6 dB
- π space (1/4 free sound field): +12 dB
- π/2 space (1/8 free sound field): +18 dB
Level Balance and Polarity Adjustment: When used with full-range speakers, the level balance and polarity for each speaker should be adjusted independently based on the installation site.
- Level Adjustment: Increase or decrease the subwoofer's level (or full-range speaker's level) as appropriate for the number of units and installation conditions.
- Polarity Adjustment: Acoustic energy is added when the subwoofer and full-range speakers are in phase in their crossover band, and subtracted if they are in reversed phase. The manual recommends comparing the degree of acoustic energy increase by switching the polarity of the subwoofer connection (positive to negative and negative to positive) and choosing the connection that yields the greatest increase. For accurate polarity matching, actual measurements of acoustic energy using a real-time spectrum analyzer are recommended.
Cascade Configuration: Two speaker systems can be operated in parallel by connecting them in a cascade configuration. When doing so, ensure the speaker system is connected to a power amplifier's output terminal of 4 Ω or less to prevent amplifier failure.
Optional Products: The HY-PF1B (black) or HY-PF1W (white) Speaker Rigging Frame can be used to suspend the FB-120 subwoofer together with TOA HX-5 series speakers.

Maintenance Features and Safety Precautions:

Professional Installation: All installation work, especially for flying applications, should be referred to the dealer from whom the speaker was purchased. Flying installations require extensive technical knowledge and experience to prevent personal injury from falling speakers.
Structural Support: Install the unit only in locations that can structurally support its weight and the mounting bracket.
Indoor Use Only: The unit is designed for indoor use. Outdoor installation can lead to part aging, causing the unit to fall.
Two-Person Installation: Due to its size and weight, at least two persons are required for installation to prevent personal injury.
Secure Fastening: Use appropriate nuts and bolts for the ceiling's structure and composition. Tighten all nuts and bolts securely, ensuring no loose joints in the bracket after installation.
Vibration Avoidance: Do not mount the unit in locations exposed to constant vibration, as this can damage the mounting bracket and cause the unit to fall.
Sharp Edges: Avoid touching the unit's sharp metal edges to prevent injury.
Electrical Safety: Always switch off the amplifier's power when connecting speakers to prevent electric shocks.
Weight Restrictions: Do not place heavy objects on the unit, stand or sit on it, or hang from it, as this can cause it to fall, resulting in personal injury and/or property damage.
Distortion Warning: Do not operate the unit for extended periods with distorted sound. Distortion indicates a malfunction that can generate heat and potentially lead to fire.
Regular Inspection: Have the unit checked periodically by the shop from where it was purchased. Failure to do so can lead to corrosion or damage to the unit or its mounting bracket, potentially causing the unit to fall.
Suspension Component Selection: When suspending, select wire, chain, and/or anchor shackles with a safety factor appropriate to the weight of the speaker system. Incorrect selection can lead to the speaker system falling, resulting in damage and/or personal injury.
Supplied Hardware: Use screws supplied with the optional flying hardware when installing the speaker with such hardware.
Installation Methods: Do not use methods other than those specified to install the unit, as extreme force can be applied, causing the unit to fall.