Other than p channel in this case , same for BUZ901P nch eg BUZ906P 200V, 8A ,datasheet says "POWER MOSFETS FOR AUDIO APPLICATIONS" but also "FEATURES ... (for use in) HIGH SPEED SWITCHING ... "
Would a powerFET designed solely for high speed switching use and 125W rating be derated in power handling terms to only 50W say for linear 10 Hz use. Or secondary oscillation liability if paralleled up devices? or some other operational failing in audio use not found with smps say ?