The price of a SANYO amplifier is primarily driven by its Power Output (RMS), Total Harmonic Distortion (THD), and the type of amplification circuit (e.g., Class AB vs. Class D). For B2B sourcing, ensure the unit features genuine SANYO Thick Film ICs (STK series) if you are looking for vintage-style high-fidelity sound, as these components significantly impact the market value. Additionally, verify the Signal-to-Noise Ratio (SNR); high-end models should exceed 90dB to ensure professional-grade audio clarity.