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Audio Pro A4-14 Service Manual

Audio Pro A4-14
8 pages
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Audio Pro A4-14 Specifications

General IconGeneral
AmplifierClass D
ConnectivityBluetooth
Tweeter1"
Crossover Frequency2.5kHz
OutputsSub output
WirelessBluetooth
ColorsBlack, White

Summary

Technical Description

1.1 Power Supply Circuits

Describes the unregulated and regulated power supplies for the amplifier.

1.2 Automatic ON/OFF

Explains the auto turn-on/off mechanism controlled by signal presence.

1.3 Overload Protection For Midrange And Tweeter

Details the overload protection for high-frequency drivers using Z202.

1.4 Input Stage

Describes how audio signals enter and are processed by the input stage.

1.5 Bass Circuits

Explains the bass control circuits and their effect on woofer signal levels.

1.6 Ace-Bass Circuit

Describes the ACE-BASS amplifier circuit for enhanced bass response.

1.7 Midrange And Treble Circuits

Details the circuits for midrange and treble amplification and crossover.

1.8 Power Stage For Woofers

Explains the power amplifier stage for the woofers, including input and output.

1.9 Power Amplifier For Midrange And Tweeter

Describes the power amplifier for midrange and tweeter drivers.

Fault Finding

Adjustments

3.1 Bias Current In Power Amplifiers

Details how to readjust bias current in power amplifiers after transistor replacement.

3.2 Negative Output Resistance

Explains the need to readjust negative output resistance after woofer or resistor changes.

Spare Parts

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