(ONE) CROWN MACRO-TECH MA3600VZ POWER AMPLIFIER. These units may show signs of minor scratches and blemishes from normal use. These units are in working order. Frequency Response 20Hz – 20 kHz. Phase Response 10Hz – 20 kHz. Signal to Noise 20 Hz to 20 kHz. Total Harmonic Distortion 20 Hz to 1 kHz at 20 […]... Read More