User Manual

1.8. Signal processing in the PC-D/DI series
PC-D/DI series units consist of three blocks: INPUT, USER, and SPEAKER PROCESSOR. INPUT specifies the
routing, and USER EQ and USER DELAY apply acoustical adjustments. SPEAKER PROCESSOR applies acoustical
adjustments as appropriate for the speakers.
For details on these types of processing, refer to the sections of "PROCESSING screen."
1.9. Input sensitivity and amp gain
The PC-D/DI series lets you specify input sensitivity and amp gain settings using two types of input sensitivity or
two types of amp gain. Input sensitivity is the input signal level that produces maximum output. When a signal
that exceeds the input sensitivity is input, a limiter inside the PC-D/DI series unit is applied. Reducing the volume
raises the input sensitivity and lowers the amp gain. Reducing the volume does not change the maximum output.
For example on the PC412-D if you set amp gain to 32 dB, the maximum output will be 1200W and the input
sensitivity will be +10 dBu (when speaker impedance is 8Ω). If the volume is not reduced (0 dB), an input of +10
dBu produces 1200W output. Reducing the volume 10 dB makes the input sensitivity of the PC412-D be +20 dBu
(= +10 dBu + 10 dBu), and the amp gain will be 22 dB (= 32 dB - 10 dB). An input of＋20 dBu produces 1200W
maximum output.
■When the PC412-D’s amp gain setting is 32 dB
1. Introduction
4 | PC412-D PC412-DI PC406-D PC406-DI Owner’s Manual