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