400W Hi-fi Audio Power Amplifier Board

400 Watt Hi-Fi Audio Power Amplifier Board (Assembled) using C5200 and A1943

This assembled amplifier board is designed for high-power audio amplification using a dual-rail DC power supply.

Output Power:

• Maximum output power: up to 400 W (depends on supply voltage, load, and heat dissipation)

Working Voltage:

• Dual supply: ±18 V to ±45 V DC
• Recommended transformer: 30-0-30 VAC, 5 A to 8 A (step-down)

Speaker Compatibility:

• Supports 4 Ω and 8 Ω speaker loads
• Suitable for speakers rated from 100 W to 600 W

Configuration:

• Output stage uses C5200 (NPN) and A1943 (PNP) power transistors
• Fully assembled board
• Requires proper heat sinking for continuous operation

Board Specifications:

• PCB dimensions: 130 mm × 82 mm (5 inch × 3.2 inch)

Package Contents:

• One assembled amplifier board
• Quick reference guide
• Circuit diagram

Included Support Material:

• Wiring diagram provided
• Bill of Materials (BOM) included
• Basic connection and usage instructions included

Intended Use:

• Audio power amplification for home audio systems
• Subwoofer and full-range speaker applications
• Musical instrument amplification (e.g., guitar, keyboard, and similar audio sources)
• PA systems for small to medium areas
• Integration into speaker enclosures and DIY audio projects