Nakamichi BX-300 Tape Deck Comparisons

A comparison of frequency responses for various EQ and Dolby settings on the same Nakamichi BX-300 tape deck using an Audio Pro 771 C-90 cassette tape. Note that the -10 dB level of all these graphs corresponds to the Nakamichi 0 dB level. Comparing four different Nakamichi BX-300 cassette decks showing their 0 dB level harmonic structure with a 1 KHz tone. Comparing four different Nakamichi BX-300 cassette decks showing their 400 Hz THD in SOURCE mode at a level of 0 dB. Comparing four different Nakamichi BX-300 cassette decks showing their 400 Hz THD in TAPE mode at a level of -10 dB. Comparing four different Nakamichi BX-300 cassette decks showing their 400 Hz THD in TAPE mode at a level of 0 dB.