The SONY XM-554ZR is a 4/3 Channel Stereo Power Amplifier. Power is supplied by MOSFET and a High Pass Filter (This filter cuts out the low and midrange tones, delivering
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The SONY XM-554ZR is a 4/3 Channel Stereo Power Amplifier. Power is supplied by MOSFET and a High Pass Filter (This filter cuts out the low and midrange tones, delivering