Description
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**2026 Black Widow NHB-368THREE – Zero Feedback Fully Balanced Stereo Power Amplifier**
**Black Widow NHB-368THREE Stereo Power Amplifier**
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### **Design Inspiration**
The NHB-368THREE is inspired by the highly acclaimed Black Widow NHB-508 Two mono power amplifier from SP Audio. Many audiophiles admire the exceptional sound performance of the 508, but its large size and weight put it beyond reach for some users.
Responding to strong demand from enthusiasts, we took on a bold challenge:
to create a stereo amplifier that **outperforms the 368TWO**, while delivering a sound signature **remarkably close to the flagship 508**—all in a more practical and accessible form.
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### **Connectivity & Rear Panel Features**
The NHB-368THREE is a versatile, high-end power amplifier equipped with multiple input options:
* BNC 50Ω impedance input
* RCA single-ended input
* XLR balanced input
* High-quality speaker terminals for left and right channels
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### **Pure Performance – Zero Feedback Design**
Built on a **zero global feedback circuit**, the NHB-368THREE avoids heavy negative feedback, resulting in a more natural, dynamic, and lifelike sound.
Despite being a stereo amplifier, it features a **true dual-mono internal architecture**, ensuring complete channel separation and superior imaging.
With its immense power and control, it effortlessly drives the majority of loudspeakers on the market—delivering authority comparable to many top-tier high-end brands.
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### **Extreme Power Supply Engineering**
* Dual 1200W high-quality transformers
* Each transformer paired with a Motorola 50A high-power rectifier
* 8 custom SP AUDIO capacitors (22,000µF each)
* Total capacitance: **176,000µF**
This massive power reserve ensures **stable, effortless performance under all conditions**, with explosive dynamics and deep control.
To further enhance signal transmission, custom **pure copper connectors** are used throughout, delivering audible improvements in clarity and transparency.
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### **Premium Circuit Design**
* Thick pure copper PCB with **9999 silver plating**
* Optimized layout for ultra-short signal paths
* Single-point grounding technology
* Ultra-low distortion: **< 0.001%**
Every detail is engineered to preserve even the most delicate musical signals with absolute precision.
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### **Striking Industrial Design**
Bold and unmistakable:
* Gold chassis with signature red heat sink accents
* 15mm aerospace-grade aluminum front panel
* 10mm CNC-machined aluminum rear panel
* 8mm tempered glass top cover for a full internal view
Finished with custom **SP anti-vibration feet**, forming a stable four-point grounding system that minimizes external vibrations and maximizes sonic purity.
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### **Technical Specifications**
* **Power Output:**
* 360W RMS @ 8Ω
* 600W RMS @ 4Ω
* **Gain:** 26–32 dB (selectable, reference 8Ω)
* **Input Impedance:**
* BNC: 50Ω (1Hz – 1MHz)
* RCA: >30kΩ (5Hz – 100kHz)
* XLR: >30kΩ
* **Output Impedance:** < 0.28Ω (20Hz – 20kHz)
* **Frequency Response:** 0.7Hz – 700kHz (+0 / -3dB)
* **Rise Time:** < 0.8µs
* **Slew Rate:** > 200 V/µs
* **DC Offset:** ±25mV
* **THD:** < 1% (7Hz – 77kHz within dynamic range)
* **Signal-to-Noise Ratio:** > 110dB (A-weighted)
* **Power Consumption:**
* Standby: 3W
* Idle: 110W
* Max transformer capacity: 3000W
* **Dimensions:**
* 480 × 425 × 220 mm (W × D × H)
* Depth with handles: 545 mm
* **Net Weight:** 51 kg
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### **Conclusion**
The NHB-368THREE is not just another amplifier—it is a statement piece.
A perfect balance of **raw power, refined engineering, and luxurious design**, created for audiophiles who demand performance close to flagship level—without compromise.
**Experience authority. Experience precision. Experience Black Widow.**
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