an equalization section configured to carry out an equalization with respect to {HEAD ~ a signal sequence} reproduced from a magnetic recording medium, and to output {TAIL ~ an equalized waveform}; and 
an equalization section configured to carry out an equalization with respect to { HEAD ~ a signal sequence } reproduced from a magnetic recording medium , and to output { TAIL ~ an equalized waveform } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH