Bipolars provide a higher current delivery than MOS-FET's, an important "bass control" factor.
Mos-fets or Bipolars
why does a bipolar amp offer more bass control and output versus a mos-fet? Will a bipolar amp be more stable in the bridged mode with each side of the amplifier seeing 2ohms when driving a 4ohm sub ? I just found out my Adcom 555mkII is a bipolar amp.Learn something new every day.