Signal Processing In Px Amplifier; Input Sensitivity And Amplifier Gain - Yamaha PX10 Reference Manual

Owner's manual (2 pages)

Service manual (148 pages)

Table of Contents

 Signal processing in PX amplifier

The PX amplifier gives you comprehensive control over the sound with input processors and speaker processors. The signals from the input connectors are processed in input processors

equipped in each input connectors. The processed signals are added or divided depending on the set routing, processed finally with the speaker processor in each channel, and output from the

[SPEAKERS] terminals.

Input processor

D-Contour

Delay

Refer to

"TUNING screen" (page 25)

 Input sensitivity and amplifier gain

The PX amplifier specifies the input sensitivity/amplifier gain from two input sensitivities or two amplifier gains. Input sensitivity controls the input signal level so that the amplifier can output

the maximum power. If signals over the input sensitivity are input, the built-in limiter of the PX amplifier is activated. If the volume is lowered, the input sensitivity rises and the amplifier gain

declines. Maximum power is constant if the volume is lowered.

For example, if the amplifier gain on the PX10 is set to 32 dB, the input sensitivity is +9.3 dBu and the maximum output power is 1,000 W (if speaker impedance is 8Ω). When the volume is not

lowered (0 dB), output power of 1,000 W results with +9.3 dBu input.

When the volume on the PX10 is lowered to 6 dB, the input sensitivity is +15.3 dBu (9.3 dBu + 6 dBu) and the amplifier gain is 26 dB (32 dB - 6 dB). If a +15.3 dBu signal is input, maximum

output power of 1,000 W is gained.

Speaker processor

HPF

"Panel Operation"

for details on the processing.

Maximum output power 41.3 dBu

(1000 W, 8Ω)

Input sensitivity +15.3 dBu

Input sensitivity +9.3 dBu

Speaker

LPF

Polarity