Pioneer M-25 User Manual

CONTENTS
Features.......................................................... 2
Configuration of the Stereo System ................ 3
Connection Diagram ....................................... 4
Operation ....................................................... 5
Protective Circuitry ...................................... 5
Combinations with the M-25 ........................ 6
Maintenance ................................................... 6
Characteristics Charts ..................................... 7
Specifications ................................................. 8
IMPORTANT NOTICE
The serial number for this equipment is located on the
bottom plate. Please write this serial number on your
enclosed warranty card and keep in a secure area. This is
for your security.
WARNING: TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.

Pioneer M-25 Specifications

General

Power Output	120 watts per channel into 8Ω (stereo)
Frequency Response	10Hz to 100kHz
Total Harmonic Distortion	0.003%
Input Sensitivity	150 mV
Signal-to-Noise Ratio	120dB
Damping factor	100
Dimensions	420 x 280 x 105 mm
Weight	16.3kg

Summary

Features

Power Amplifier Performance

Details on 120W+120W output, wide frequency band, low distortion, and Class-AB circuitry.

Power Supply and Protection

Twin transformer power supply for separation and overview of protective circuitry.

Component Quality and Design

Information on selected high-quality parts and the amplifier's aesthetic design.

Configuration of the Stereo System

Audio Component and Environmental Setup

Guidance on connecting audio components and setting up shelves, curtains, and carpets.

Speaker Placement and Location Avoidance

Recommendations for speaker placement and avoiding unsuitable locations for the system.

Connection Diagram

Speaker System Connection

Instructions for connecting speaker systems to the amplifier output terminals.

Preamplifier Connection

Instructions for connecting the preamplifier to the amplifier's input terminals.

Operation

Pre-Operation Setup

Steps for setting preamplifier controls and powering on the M-25.

Starting Playback

Procedure for commencing audio playback and adjusting volume and tone.

Protective Circuitry

Muting and Protection Mechanism

Explanation of the amplifier's muting circuit and automatic protection features.

Maintenance

Cleaning Procedures

Guidelines for cleaning the operating panel, casing, and radiator fins.

Name Plate Attachment

Instructions for attaching the name plate in different orientations.

Specifications

Amplifier Section Details

Technical specifications for circuitry, power output, distortion, and frequency response.

Input, Output, and Other Specs

Details on input sensitivity, impedance, speaker compatibility, damping factor, hum/noise, and semiconductors.

Miscellaneous and Physical Data

Information on power requirements, consumption, dimensions, and weight.