Tonewinner AD-1PA Pure Class A / A-B Stereo Power Amplifier

The Tonewinner AD-1PA is a high-fidelity stereo power amplifier engineered for discerning listeners and demanding high-performance audio systems. Its hybrid design delivers Pure Class A power at low levels and transitions into Class A/B for substantial output, combining the smooth musicality of Class A with the drive and control needed for real-world loudspeakers. Built with premium components, a robust toroidal transformer, and meticulously engineered circuitry, the AD-1PA offers effortless dynamics, refined detail, and consistent stability across a wide range of load conditions.

Features

• Hybrid Pure Class A / Class A-B amplifier topology for musicality and power
• High current toroidal power transformer with substantial energy reserves
• Balanced performance with refined transient response and low distortion
• Precision matched output devices for reliable, consistent power delivery
• Heavy-duty heatsinking for thermal stability under extended use
• 2-channel stereo operation for paired loudspeakers
• High-quality build with audiophile-grade components throughout
• Sleek, minimalist industrial design suitable for modern audio systems

Specifications

• Amplification Type: Hybrid Pure Class A / Class A-B
• Power Output (8 Ω): Up to 300W RMS per channel
• Power Output (4 Ω): Higher current drive for demanding speaker loads
• Signal-to-Noise Ratio (SNR): High SNR for quiet, clean playback
• Total Harmonic Distortion: Low distortion across the audioband
• Power Supply: Large toroidal transformer with high current capability
• Inputs: Stereo line-level inputs
• Outputs: Speaker binding posts for left and right channels
• Chassis Construction: Heavy-duty metal chassis with robust heat-management
• Dimensions: Standard hi-fi width form factor
• Weight: Substantial amplifier weight for enhanced stability