The dynamic range of 16bit 44k recordings is regarded as 96 dB, i.e. the highest recordable signal level will be 96 dB above the lowest, zero record level. I've seen the origianl minidisc format being quoted with a dynamic range up to 120 dB. Whether you believe this or not is another argumant, but its all pretty irrelavent because everyone forgets about the noise floor of the equipment, be it miniidsc or not. If your quoted dynamic range is 96 dB re zero recording level of 0 dB and the noise floor of the equipment is say 20 dB (this would be the hiss you hear at high playback level) then your dynamic range becomes 76 dB, regardless.