Może nei do końca wysokiej klasy ale właściciel Greace Design pisze o wbudowanym w m()@ wzmaku tak
""The PCM 1730\'s current output and this allow us to build our own transimpedance amp for current-to-voltage conversion," Michael Grace told me. (The usual, cheaper approach is to turn current to voltage via a voltage-feedback op-amp.) "The way current-to-voltage conversion is handled determines the characteristics of the sound," he continued. "Current-feedback amplifiers have a low-impedance current input and so don\'t have slew-rate limitation issues with instantaneous changes in the current coming into the amp. Voltage-feedback amplifiers, by contrast, constantly operate in a nonlinear way when they\'re used for current-to-voltage conversion. As a result, transimpedance amplifiers have a more open, harmonically rich and detailed sound.
"No single design concept accounts for the [m902\'s] sound," said Michael. "For instance, we don\'t like electrolytic capacitors, preferring polymer film capacitors anywhere possible in the signal path. The headphone amplifier itself is an Analog Devices DSL transimpedance driver capable of very high current output. It can drive a signal from a modem in your home or office, via a twisted pair of wire, a mile or two to the phone company, and can deal with high amounts of capacitance and reactance. Because it has no slew-rate limitations, it can track the rich harmonic content and overtones of the music in a way that a regular amplifier can\'t." "
Nie do końca łapię ten techniczny język niestety ;(
