Description
LM324 SMD Bass Treble Tone Control Preamplifier Board
The LM324 SMD Bass Treble Board is a compact audio tone control preamplifier module designed to enhance sound quality by allowing independent adjustment of bass and treble frequencies. Built around the reliable LM324 operational amplifier IC, this module processes low-level audio signals before sending them to a power amplifier, improving clarity, balance, and overall audio performance.
This board is commonly used between audio sources (Bluetooth modules, MP3 players, mobile phones, PCs) and power amplifier boards such as Class-D or Class-AB amplifiers. It provides clean signal amplification and adjustable tone control, making it ideal for DIY speaker systems, audio projects, and custom amplifier builds.
Operating on a 9V–15V DC power supply (typically 12V), the board supports external dual potentiometers for bass and treble adjustment, allowing users to fine-tune the sound output according to their preference.
Compact, efficient, and easy to integrate, the LM324 Bass Treble Tone Control Board is perfect for electronics hobbyists, technicians, and audio enthusiasts building customized sound systems.
Key Features
• Built with LM324 SMD operational amplifier IC.
• Provides bass and treble tone control adjustment.
• Works as an audio preamplifier module.
• Improves sound clarity and tonal balance.
• Operates on 9V–15V DC (12V recommended).
• Compatible with Class-D and Class-AB amplifier boards.
• Compact PCB design for easy installation.
• Supports external potentiometers for tone adjustment.
• Ideal for DIY audio amplifier projects.
• Low noise audio processing performance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Audio Tone Control Preamplifier Board |
| Amplifier IC | LM324 (SMD) |
| Circuit Type | Bass Treble Tone Control |
| Input Signal | Low Level Audio Signal |
| Output Signal | Pre-Amplified Audio Signal |
| Operating Voltage | 9V – 15V DC |
| Recommended Voltage | 12V DC |
| Control Type | External Potentiometers |
| Potentiometer Value | 47K – 100K Dual Potentiometers |
| Audio Channels | Stereo (Left / Right) |
| PCB Type | Compact SMD Board |
| Application | Audio Pre-Amplifier and Tone Control |
Applications
• DIY audio amplifier systems.
• Home speaker systems.
• Bluetooth audio projects.
• Custom amplifier builds.
• Audio tone adjustment circuits.
• Portable sound systems.
• Electronics hobby projects.
• Audio signal processing modules.
• DIY stereo amplifier kits.
Precautions
• Do not connect the board directly to speakers.
• Always connect it between audio source and power amplifier.
• Ensure correct power polarity (V+ and GND).
• Use shielded cables for audio input/output to reduce noise.
• Keep potentiometer wiring short to prevent interference.
• Do not exceed 15V DC input voltage.