30W Direct-Coupled FET Amplifier Board

This high-performance direct-coupled FET power amplifier board delivers 30W output into 8 ohms, operating in pure Class A mode at ±28V supply. Dimensions are 100 × 50 × 40 mm, with a robust construction combining PCB and metal components. It features ultra-low harmonic distortion (100), and excellent signal-to-noise ratio (>96 dB). The slew rate exceeds 30 V/µs, input sensitivity is 0.5 V (RMS), input impedance is 10 kΩ, and gain is 31 dB. Recommended supply voltage is ±24V DC; maximum allowable is ±28V — equivalent to AC 20V full-bridge rectified output. Designed for precision audio applications, this board enables seamless integration into custom hi-fi amplifiers, active speaker systems, or laboratory-grade signal conditioning setups. Its direct-coupled topology eliminates coupling capacitors, preserving low-frequency integrity and transient accuracy — ideal for audiophile-grade and measurement-critical use cases where phase linearity and DC stability matter. The compact form factor and proven FET-based design make it suitable for both prototyping and small-batch production builds. All electrical parameters are measured under standard conditions and reflect real-world performance without extrapolation or marketing inflation.