Pioneer A-445 User Manual

Q) PIONEER’
The future of sound and vision.
Sooo
STEREO AMPLIFIER
AMPLIFICATEUR STEREO
STEREOVERSTARKER
OPENED sremoumeen A445
The illustration shows model A-445.
L'illustration montre le modéle A-445.
Die Abbilidung zeigt Modell A-445.
IMPORTANT
The lightning flash with arrowhead, within an
equilateral triangle, isintended to alert the user of the
presence of uninsulated “dangerous voltage” within the
product's enclosure that may be of sufficient magni-
tude to constitute a risk of electric shock to persons.
CAUTION
RISK OF ELECTRIC SHOCK
OO NOT OPEN
CAUTION:
TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
Operating Instructions
Mode d’emploi
Bedienungsanleitung
Gebruiksaanwijzing
Nederlands
The exclamation point within an equilateral triangle is
intended to alert the user of the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.

Pioneer A-445 Specifications

General

Power Output	60 watts per channel into 8Ω (stereo)
Input sensitivity	150mV (line)
Total Harmonic Distortion (THD)	0.08%
Frequency Response	5Hz to 100kHz
Signal-to-Noise Ratio	100 dB (A-weighted)
Input Impedance	47k ohms

Summary

Safety Warnings

Important Safety Information

Alerts user to dangerous voltage within product enclosure, a risk of electric shock.

Electrical Shock Hazard Warning

Warns against removing cover to prevent electric shock; refers servicing to qualified personnel.

Front Panel Controls Overview

Power Switch and Indicator

Controls unit power ON/OFF; indicator lights when power is ON.

Speaker Selector Switches

Selects speaker systems A or B for listening; ON for sound, OFF for no sound.

Input Selector Switch

Selects playback source from various connected components.

Volume Control

Adjusts the playback volume level.

Direct Switch

Bypasses tone controls for pure sound reproduction.

Audio Tone and Sound Controls

Bass and Treble Tone Controls

Adjusts low and high frequency tones; center position is flat.

Loudness Control

Boosts low/high frequencies for playback at low volume levels.

Subsonic Filter

Cuts frequencies below 17 Hz to eliminate super-low noise.

Balance Control

Adjusts sound balance between left and right speakers.

Connections and Setup

Connecting Speaker Cords

Instructions for stripping wire, inserting into terminals, and tightening.

Connecting Input/Output Cords

Guidelines for connecting audio cables with red/white plugs.

Using Adaptor Terminals

Procedure for connecting components like equalizers to adaptor terminals.

Operating Procedures

Playback Procedures

Steps for selecting playback source and operating playback equipment.

Recording Tapes

Instructions for selecting recording equipment and starting recording.

Monitoring While Recording

How to hear sound concurrently while recording on a 3-head tape deck.

Copying Tapes

Procedure for copying audio from one tape deck to another.

Troubleshooting Guide

No Power Supplied

Diagnoses and remedies for unit not receiving power.

No Sound Output

Troubleshooting steps for when no sound is heard from the unit.

No Sound From One Speaker

Identifies causes and solutions for sound only in one speaker.

Recording or Tape Copying Issues

Addresses problems with recording and tape copying functions.

Specifications

Amplifier Section Specifications

Details power output, distortion, sensitivity, and frequency response.

Tone Control and Signal-to-Noise Ratios

Provides specifications for tone controls, loudness, filters, and S/N ratios.

Power Supply and Miscellaneous

Lists power requirements, consumption, dimensions, and weight.

Maintenance

Maintenance of External Surfaces

Guidance on cleaning the unit's exterior surfaces safely.