Chapter 28

Input Processing and Auxiliary Systems

Ground Lift Switches

Phase Reversal Facility

Gain Control

Subsonic Filtering: High-pass

Ultrasonic Filtering: Low-pass

Combined Filters

Electronic Crossovers

Digital Signal Processing

Signal-present Indication

Output Level Indication

Signal Activation

12 V Trigger Activation

Infra-red Remote Control

Other Amplifier Facilities

References

This chapter deals with input processing functions such as gain control and filtering, and other power amplifier features that are not part of the signal path, but perform ancillary functions such as level indication or control of on/stand-by switching.

Ground Lift Switches

If balanced inputs with high CMRR are used, they should deal effectively with ...

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