The circuit is similar to stereo tone booster that uses the principle of High Pass Filters are then amplified to produce a powerful high tone; and also uses the principle of Low Pass Filter which is then amplified to produce a powerful low tone.

Regulated DC power supply 12-15V should be used to make this circuit work with the maximum performance and reduce “hum” noise.

Galaxy Audio Booster PCB Layout

RC4558 Op-Amps Description

The RC4558 device is a dual general-purpose operational amplifier, with each half electrically similar to the ?uA741, except that offset null capability is not provided.

The high common-mode input voltage range and the absence of latch-up make this amplifier ideal for voltage-follower applications. The device is short-circuit protected, and the internal frequency compensation ensures stability without external components.

RC4558 Features:

• Continuous Short-Circuit Protection
• Wide Common-Mode and Differential Voltage Ranges
• No Frequency Compensation Required
• Low Power Consumption
• No Latch-Up
• Unity-Gain Bandwidth: 3 MHz Typ
• Gain and Phase Match Between Amplifiers
• Low Noise: 8 nV/√Hz Typ at 1 kHz

APPLICATIONS

• DVD Recorders and Players
• Pro Audio Mixers

Download datasheet document: RC4558 Datasheet

Source: circuitschematicelectronics.blogspot.co.id