Please note that in the case of Nakamichi cassette decks, during the process of level and equalisation calibration, your product will be set up for our reference Nakamichi ZX, SX and EX tape types unless you prefer to specify a particular preferred tape formulation.  In this case please provide us with a sample of the tape you would like the machine to be optomised for.  Please note that we shall need to make test recordings on this tape.