NE5532 Dual Op-Amp Stereo Preamp Module | True Dual-Channel Design | Adjustable Gain 5x-20x | AC/DC Compatible

Product Description

Professional-Grade Audio Preamplification for Your DIY Projects

Built around the NE5532 dual low-noise operational amplifier, this stereo preamp module delivers the clean, transparent gain you need for microphone preamplification, line-level buffering, and audio signal conditioning. Whether you're building a home recording setup, modifying vintage gear, or prototyping your next audio circuit, this board offers genuine dual-channel architecture with independent op-amps per channel—no compromises.

Key Technical Features

🎛️ True Stereo Architecture

• Dedicated NE5532 op-amp per channel (not shared between L/R)
• Superior channel separation and lower crosstalk vs. single-chip dual-channel designs
• Ideal for critical listening applications and professional audio paths

⚡ Flexible Power Supply Options

• AC Input: 5-16V AC (onboard rectification and filtering)
• DC Input: 6-24V DC single supply
• Integrated single-to-dual rail converter provides virtual ground for bipolar operation
• Large-capacity filter capacitors ensure clean, stable power delivery

🔧 User-Adjustable Gain

• Default gain: ~5x (14 dB) as shipped
• Gain range: Adjustable from 5x to 20x+ by changing R1/R5 feedback resistors
• Resistor range: 5kΩ - 100kΩ (higher resistance = higher gain)
• Easy modification: Desolder SMD resistors and install through-hole components for experimentation

📐 Compact PCB Design

• Dimensions: 50mm × 50mm (1.97" × 1.97")
• Height: ~23mm with components
• Mounting holes for secure installation in enclosures
• Professional red solder mask with clear silkscreen labeling

Technical Specifications

What's Included

• 1× Dual NE5532 Preamp PCB (fully assembled)
• 2× Signal cables with connectors
• Ready to integrate—just add power and audio I/O
• Online installation and operating manual

Perfect For

✅ DIY Microphone Preamps – Boost dynamic and condenser mic signals
✅ Instrument Buffers – High-impedance guitar/bass input stages
✅ Line-Level Gain Stages – Add clean gain to mixer channels or effects loops
✅ Vintage Gear Restoration – Drop-in replacement for aging preamp circuits
✅ Audio Prototyping – Breadboard-friendly design for circuit experimentation
✅ Home Recording Studios – Cost-effective way to expand your preamp collection

Why the NE5532?

The NE5532 has been the gold standard for audio op-amps since the 1980s, trusted by engineers at countless pro audio manufacturers. With its low noise floor (5 nV/√Hz), high slew rate (9 V/µs), and wide bandwidth, it delivers transparent amplification that lets your source material shine through.

Modification Notes for Advanced Users

• Gain calculation: Av ≈ 1 + (Rf/Rg), where Rf = R1 or R5
• Resistor swap: Remove SMD resistors with hot air or solder wick; install through-hole resistors across the same pads
• Recommended resistor types: Metal film (1% tolerance) for best noise performance
• Power supply filtering: Onboard rectifier + large electrolytics handle ripple; add external regulation for ultra-low-noise applications

Important Notes

• This is a preamp module, not a power amplifier—it provides voltage gain, not current drive for speakers
• Requires external power supply (AC transformer or DC wall adapter)
• Input/output connections via screw terminals for power and pin headers for audio signals
• No phantom power generation (for condenser mics, add external 48V supply)