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CEILING SPEAKER SYSTEM
An optional electronic controller AC-120 is required when using the F-121C or F-121CM.
For details, refer to the section "7. System Examples".
1. Nomenclature and Dimensional Diagrams
Speaker
Stopper
Front Grille
2. Features
Bass-reflex design with high power rating and wide range.
Full-range 12 cm speaker.
Can be easily mounted on the ceiling or wall.
Unique acoustic construction employing a diffuser provides extremely wide area coverage and wide
directivity, resulting in uniform sound pressure level in any locations. (F-121C and F-121CM)
Optimum frequency response with use of the AC-120. (F-121C and F-121CM)
Spring
Stopper mounting screw
Push-in terminal
F-101C/F-101CM
TOA Corporation
INSTRUCTION MANUAL
F-101C, F-101CM
F-121C, F-121CM
Speaker unit
Bass reflex duct
Stopper mounting screw
S-shaped hook
F-121C/F-121CM
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Summary of Contents for Toa F-101C
- Page 1 Unique acoustic construction employing a diffuser provides extremely wide area coverage and wide directivity, resulting in uniform sound pressure level in any locations. (F-121C and F-121CM) Optimum frequency response with use of the AC-120. (F-121C and F-121CM) F-101C, F-101CM F-121C, F-121CM Stopper mounting screw...
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Page 2: Safety Precautions
The input impedance of the F-101CM and F-121CM is factory-preset to 3.3 When changing the impedance, first confirm whether the speaker line is 70 V or 100 V line. Then disconnect the red lead wire connected to the current transformer tap, and reconnect it to the desired tap. -
Page 3: Specifications
5. Overload Protective Circuit (F-101C and F-121C) Both the F-101C and F-121C are equipped with a circuit to protect them against extremely large input. If the sound volume drops during use, this means that the protective circuit is in operation. In such a case, turn down the volume and wait till the protective circuit is automatically reset (10 seconds after turned down). - Page 4 System employing a sub-woofer Electronic controller AC-120 Mixer/pre-amplifier When using TOA's digital signal processor instead of the AC-120, it is recommended that frequency characteristics be set as shown in the following tables: Filter characteristics for F-121C/F-121CM (normal mode) (Setting for ordinary applications)
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