Do you have a question about the Yamaha MS400 and is the answer not in the manual?
Details the speaker's type, units, frequency range, output level, dimensions, and weight.
Lists output power, crossover frequency, input sensitivity, impedance, and power requirements.
Shows the location and labeling of all rear panel connectors and controls.
Step-by-step guide for removing amplifier, cabinet, baffle, and speaker components.
Lists part numbers for various amplifier circuit boards (1/5 to 5/5).
Details the removal procedure for the power transformer unit.
Detailed component layout and schematic for the AMP1/5 circuit board.
Covers preparation, power, adjustment, midpoint potential, gain, and distortion checks for the amplifier.
Lists abbreviations used for different country/region model destinations.
Explains warnings and notations used within the parts list section.
Lists electrical components like capacitors, connectors, and diodes with their specifications.