Rotel Integrated Amps: A14MKII, RA-1572MKII & RA-1592MKII 12. May 2021 The integrated amplifier models from Rotel are getting an upgrade. These are three products from the 14 and 15 series, namely the new A14MKII, RA-1572MKII, and RA-1592MKII. We give a brief overview.