SSM2167 Mic Preamp Board – Compressor, Limiter & Noise Gate DC 3-5V

SSM2167 Microphone Preamplifier Board – Compressor, Limiter & Noise Gate Module

Upgrade your audio signal chain with the SSM2167 Microphone Preamplifier Board — a compact, high-performance preamp module featuring built-in compression, limiting, and noise gate functionality. Designed around the legendary SSM2167 IC, this low-voltage (DC 3V–5V) module is perfect for DIY audio projects, voice recorders, Raspberry Pi builds, Arduino microphone inputs, and any application demanding clean, intelligible audio with minimal noise. Made in Mainland China.

Why Choose the SSM2167 Preamp Module?

• Low Voltage Operation (DC 3V–5V): Integrates seamlessly into battery-powered and low-power embedded systems without requiring a separate high-voltage supply.
• Ultra-Low Noise Design: Minimizes unwanted background hiss and interference, delivering clean and accurate audio reproduction every time.
• Built-In Dynamic Compression: Automatically reduces peak signal levels and boosts quieter sounds, keeping your audio at a consistent, intelligible level without clipping.
• Noise Gate Function: Selectively attenuates signals that fall below a set threshold — amplifying only desired sounds like speech while suppressing background noise in the output.
• Low Power Consumption: Energy-efficient design makes it ideal for portable and battery-operated applications without sacrificing audio quality.
• Compact Form Factor: Measures just 22×14×3mm (approx. 0.87×0.55×0.12 in) — fits into tight enclosures and compact PCB layouts with ease.
• High Clarity Audio Output: Enhanced voice intelligibility thanks to combined compression and noise gate processing — far superior to standard op-amp preamplifier circuits.

Technical Specifications

• IC: SSM2167
• Operating Voltage: DC 3V – 5V
• Type: Mono Microphone Preamplifier Module
• Features: Compression, Limiting, Noise Gate
• Dimensions: 22 × 14 × 3 mm / 0.87 × 0.55 × 0.12 inch
• Condition: Brand New
• Country of Origin: Made in Mainland China

What's in the Box?

• 1 × SSM2167 Microphone Preamplifier Board

Great For

• Raspberry Pi, Arduino & microcontroller audio projects
• DIY voice recorders and intercom systems
• Portable PA and amplification systems
• Noise-sensitive audio signal chains
• Battery-powered audio equipment
• Embedded speech recognition systems

For further reading on audio signal processing standards and electronics safety, visit the National Institute of Standards and Technology (NIST) Electronics Resources.

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Note: Due to variations in monitor calibration and lighting, the actual product color may differ slightly from images shown. Please allow ±1–2cm measurement tolerance due to manual measurement.

Frequently Asked Questions

Q: What voltage does the SSM2167 microphone preamplifier board require?

A: The SSM2167 preamp board operates on a supply voltage of DC 3V to 5V, making it compatible with a wide range of low-power systems including 3.3V and 5V microcontrollers such as Arduino and Raspberry Pi.

Q: What is the difference between compression and a noise gate in this preamp module?

A: The compressor reduces the dynamic range of the microphone signal — it lowers loud peaks and adds gain to quieter sounds, resulting in a more consistent audio level. The noise gate attenuates signals that fall below a certain threshold, so only intentional sounds (like speech) are amplified while ambient background noise is suppressed. Together, these features significantly improve voice clarity.

Q: Can this SSM2167 preamp board be used in battery-powered projects?

A: Absolutely. The module's low voltage (3V–5V) and low power consumption design make it an excellent choice for battery-powered audio applications, portable recorders, wearables, and other energy-sensitive embedded systems.

Q: What are the physical dimensions of the SSM2167 preamplifier module?

A: The board measures 22 × 14 × 3 mm (approximately 0.87 × 0.55 × 0.12 inches), making it extremely compact and easy to integrate into tight PCB layouts or small enclosures.