The Proton 520 is a vintage stereo integrated amplifier introduced in the 1980s/1992, widely recognized for its design and circuit lineage shared with the classic NAD 3020.
Sound and Community Reception
- NAD Comparison: It is frequently compared to or noted as sharing factory roots with NAD amplifiers (built around similar design philosophies or manufactured via related channels in Taiwan) , though purists note differences in component layout and later revision stages . [1, 2]
Specifications
- Power output: 20 watts per channel into 8Ω (stereo)
- Frequency response: 20Hz to 20kHz
- Total harmonic distortion: 0.015%
- Damping factor: 90
- Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line)
- Signal to noise ratio: 68dB (MC), 80dB (MM), 90dB (line)
We provide 3 months warranty for Amplifiers.
