*General use amplifiers not containing a crossover network can also be used for the low region or high region amplifier.
When Ap20909/2130 are to be used as a full range amplifier, harmful
If a line transformer is to be connected, always set to HIGH PASS (crossover network selector switch to HIGH) and crossover frequency to 100Hz.
The speaker low region cutoff frequency will slightly change depending on the line transformer used.
Block diagram
IN 
HA
HPF
LPF
H. OUT
L. OUT
LPF
COMP / LIMIT
ON / OFF
CLIP | CLIP | |
SENSER | ||
|
PA
LOAD
IMPEDANCE
SENSER
DC & LF
SENSER
OUT
PEAK LEVEL
IND.
-30 ~ 0dB
THERMAL |
HIGH
MONO | SENSER |
STEREO
THERMAL
IND.
LOW
M
FAN MOTOR
M
POWER SUPPLY
CHANNEL 2