Roland EQ-131 Owner's Manual page 6

(1) Block Diagram and Signal Flow Chart
<EQ-131>
OUTPUT
(+4dBm)
31 BAND EQUALIZER
<EQ-215>
OUTPUT A
nor (+4dBm)
COLD
(4dBm) 3
ar YPASS SW
OUTPUT B
(+4dBm)
INPUT B
(+4dBm) or