Model S USB:
TDA1541A non-oversampling DAC goes
192 kHz asynchronous USB
As of August 2011, Audial range of DACs is expanded by the Model S async USB equivalent.
Apart from swapping the Model S S/PDIF front end with asynchronous USB interface, new Model S USB generally retains its elder S/PDIF brother's no compromise, state-of-the-art topology and solutions. Still, the Model S USB also brings several updates.
And, just as an S/PDIF Model S, the USB version is a reference point in its own area, and here it is a high quality and natural audio reproduction from PC.
The main Model S USB features are:
● Asynchronous USB operation, with high class discrete crystal oscillators next to DAC as master clocks - no PLL inside
● USB front end digitally isolated from the rest of the unit, thus isolating host PC noise from the audio circuits
● Up to 192 kHz compatibility
● TDA1541A D/A converter chip, with externally clocked DEM circuit, and operating in simultaneous data mode (instead of commonly used I2S), for the ultimate jitter performance
● Proprietary transimpedance hybrid output stage, with zero feedback yet with top level performance (0.002% THD)
● Transformer coupled output (optional)
● Separately housed EI mains transformers
● Isolating mains transformer with split secondary ("balanced AC power")
● Nine independent supply lines, with multi stage common mode filtering, and zero feedback low noise regulators
● A highest quality parts
● Engraved massive aluminum chassis
● Each sample of the Model S USB is accompanied with its own lab report.
To learn more about the Model S USB, please check out its technical details and specifications.
