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Toa SF-60 Operating Instructions page 2

Professional sound system

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Input Panel
Low frequency
input terminal
Connection Diagrams
SF-60 single system (2-way multi-amplifier driving system)
Mixer/Preamplifier
Combination system with the super-woofer (3-way multi-amplifier driving system)
Mixer/Preamplifier
Frequency Dividing Network
Set each mode of the frequency dividing network as per the following tables. Best frequency response ensures as time
and phase are corrected with the built-in passive circuit.
1. SF-60 single system
(2-way multi-amplifier driving system)
Level
Phase
Normal
Crossover frequency
Slope
–12dB/octave (Butterworth)
1 -5dB stands for a standard value when con-
nected the same amplifiers for LOW and HIGH
frequencies. Make the level setting according to
the environmental conditions at installation.
High frequency
level control
Mid/High
frequency
input terminal
HIGH
Frequency dividing
LOW
network
HIGH
MID
Frequency dividing
network
LOW
LOW
HIGH
1
0dB
–5dB*
Normal
1kHz
Input terminal of the SF-60 is divided into Low and Mid/High
frequencies as the SF-60 is a 2-way multi-amplifier driving
system.
Ensure to connect polarities ( + , –) of each amplifier output
cords to the speaker terminals rightly.
Make the level setting according to the environmental con-
ditions, although almost flat frequency response is obtain-
able as long as the High frequency level control is set to
the NORMAL.
Power amplifier
Power amplifier
2. Combination system with the super-woofer
(3-way multi-amplifier driving system)
LOW
depending on
Level
the system
Phase
Reverse*
Crossover frequency
80~125Hz*
Slope
–12dB/octave*
2 The crossover between LOW and MID frequency
range stands for typical one.
When Slope characteristics is changed, best
characteristics is obtainable by changing phase
of LOW frequency range into normal. Finally de-
cide the change at the time of measurement or
test listening.
MID &
HIGH
SF-60
LOW
MID &
HIGH
SF-60
LOW
SW-46W-UL2
SW-38W-UL
SW-38S-UL, etc.
SW-46S-UL2
MID
HIGH
0dB
–5dB
2
Normal
Normal
2
1kHz
2
–12dB/octave

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