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 Parameter Value Op-Amp IC NE5532 (dual low-noise) × 2 Power Input AC 5-16V or DC 6-24V Channels 2 (stereo) Default Gain ~5x (14 dB) Gain Adjustment Via R1, R5 (5k-100k) PCB Size 50 × 50 mm Connectors Screw terminals (Power) + XH2.54 headers (Audio Input/Output) 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 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) 📄 Documentation & Resources User Manual & Hookup Guide