Yamaha C20A User Manual

Covers avoiding heat, humidity, dust, shocks, opening unit, cable handling, cleaning, power supply, and interference.

Details backup battery lifespan, low battery warnings, and error message codes.

Explains time alignment and distance delay compensation using digital delay parameters.

Introduces crossover filters for HF, LF, and SLF channels, including cutoff and slope settings.

Details EQ parameters (Q, F, G) and compressor/limiter settings (TH, RA, AT, RE).

Covers equalization for room conditions and channel muting functions.

Explains gain and phase settings for HF, LF, and SLF outputs.

Covers POWER switch, level indicators, MODE/MEMORY displays, and LCD screen.

Details keys for DELAY, COMP, EQ, SLF/LF/HF channels, and STORE functions.

Explains MEMORY keys, RECALL key, UTILITY key, and MUTE key operations.

Guide to setting the input level control for optimal signal sensitivity.

Details the main INPUT and HF/LF/SLF OUTPUT connectors, including pinouts.

Covers the MODE switch, MIDI IN/OUT, and REMOTE connectors for operation and control.

Lists preset programs and guides on setup and storing custom programs.

Step-by-step process for setting input levels and balancing system outputs.

Instructions for selecting and activating programs from memory.

Explains the importance of time alignment for speaker systems and phase coherence.

How to compensate for sound delays caused by speaker placement distances.

Covers GAIN, PHASE, and filter settings for SLF and LF channels.

Details HF channel settings and variations in filter slope response.

Explains STACKING, DISTANCE, and ROOM COND. equalization modes.

Details threshold, ratio, attack, and release time for LF and HF channels.

Describes individual channel muting and the all-channel mute function.

Guide on how to confirm and store edited program data to memory.

Covers program title editing and delay display unit selection.

Details peak hold for level meters and MIDI control channel configuration.

Setting MIDI program change table and performing bulk data dumps.

Resets memory numbers 1-5 to factory default settings.

Instructions for wiring the REMOTE connector for hard-wired program selection.

How to connect and program two C20A units simultaneously via MIDI.

Details frequency response, dynamic range, input/output levels, and impedance.

Covers A/D, D/A conversion, delay time, memory locations, and MIDI capabilities.

Information on unit displays, power requirements, physical dimensions, and weight.

Visual representation of signal processing stages within the C20A.

Precise measurements of the unit in millimeters and inches.

Details the format of MIDI messages for transmission and reception.

Specifies the conditions required for MIDI data transmission and reception.

Lists MIDI functions, their transmitted/recognized status, and remarks.