PT2399 Karaoke Reverb Amplifier Board – Dual AC12V DIY PCB

PT2399 Karaoke Reverb Amplifier Board — Dual AC12V DIY PCB Module

Take your home karaoke setup or DIY audio project to the next level with this PT2399-based Karaoke Reverberation Amplifier Board. Designed for electronics enthusiasts and audio hobbyists, this compact PCB module delivers professional-grade digital reverb and microphone mixing in a ready-to-wire format. Running on a dual AC12V power supply, it integrates seamlessly into custom amplifier builds, home karaoke systems, and maker projects.

Key Features

• PT2399 Digital Echo Chip: Industry-standard chip for clean, natural-sounding reverberation and echo effects.
• Dual Microphone Inputs (MIC1 & MIC2): Connect two microphones simultaneously — standard connectors plug in directly, no adapter needed.
• Stereo Audio I/O: Separate Left/Right channel inputs (Lin / Rin) and outputs (Lout / Rout) with ground connections for clean stereo signal handling.
• 4 Adjustable Control Knobs:
  • 🎵 Music Volume: Adjust background music / accompaniment level
  • 🎤 Microphone Volume: Set microphone output level
  • 🔊 Reverb Depth: Control the intensity of the reverb effect
  • ⏱ Reverberation Time: Dial in short room echo or long hall-style reverb
• Dual AC12V Power Supply: Requires a dual AC12V transformer — delivers stable, low-noise performance.
• Compact Form Factor: 100 × 57 × 17 mm — fits easily into custom enclosures and DIY amplifier builds.
• Line-Level Output: Requires a downstream power amplifier stage — ideal for integration into larger audio systems.
• New Condition, High-Quality PCB: No high-concern chemicals; clean, reliable construction.

Specifications

Wiring Guide

• Lin / GND / Rin: Left channel audio input, ground, and right channel audio input
• Lout / GND / Rout: Left channel audio output, ground, and right channel audio output
• MIC1 / MIC2: Direct microphone connector ports — plug your microphone connectors straight in

Who Is This For?

This board is perfect for DIY electronics makers, audio engineers, and karaoke enthusiasts who want to build or upgrade their own karaoke amplifier system. Whether you're building a standalone karaoke machine, integrating reverb into a PA system, or experimenting with audio circuits, the PT2399 reverb board provides a flexible, high-quality starting point.

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Frequently Asked Questions

Q: Does this PT2399 karaoke reverb board work on its own as a complete amplifier?

A: No — this PCB is a microphone mixing and reverberation module that outputs a line-level signal. It requires a downstream power amplifier stage to drive speakers. It is designed to be integrated into a larger DIY audio or karaoke amplifier system.

Q: What power supply does the karaoke reverb board require?

A: The board requires a dual AC12V power supply (a centre-tapped transformer with dual AC12V outputs). A standard DC adapter will not work — you need an AC transformer matched to its dual AC12V specification.

Q: Can I connect two microphones at the same time to this reverb board?

A: Yes! The board features two dedicated microphone inputs (MIC1 and MIC2), allowing two microphones to be connected and used simultaneously — great for duet karaoke sessions or dual-presenter setups.

Q: What does the PT2399 chip do in this karaoke amplifier module?

A: The PT2399 is a widely used digital echo and delay chip that processes the microphone signal to produce smooth, natural-sounding reverb and echo effects. It gives your voice a full, room-filling quality during karaoke performances.