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M2Tech hiFace EVO Hi-End S/PDIF Output Interface, 16 to 32 Bits Resolution, Up to 15Mbps TOSLink Input Bit Rate

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About the M2Tech E-EVO

The M2Tech HiFace Evo is the new statement in high quality computer audio interfaces. Hosted in a compact and stylish aluminum case, hiFace Evo is capable of flawlessly transfering audio data up to 192 kHz, 24 bits to virtually every DAC or A/V receiver around, thanks to its comprehensive outputs set. hiFace Evo incorporates the same leading edge technology as the classic hiFace - with some plus.

Asynchronous operation up to 192kHz is used in conjunction with proprietary drivers which allow for Kernel Streaming, Direct Sound and WASAPI operation (the latter under Windows vista and 7). Windows and Mac drivers are already available. Very high precision, very low phase noise (jitter) crystal oscillators are used. To further improve their performance, they have a dedicated shunt voltage regulator which ensures a very low noise and spurious-free supply.

This hiFace Evo is powered by an external power supply (not included), to avoid the dirty USB bus supply from negatively affecting hiFace Evo's performance. Linear regulators are used all around, to allow all jitter-sensitive digital circuits to operate at their best. Also, a low-pass filter is provided at supply input to further reduce any bad influence from the supply.

This hiFace Evo can be powered by an external wall adapter (9V 1A will fit), or with a 9V alkaline battery, or with a 7.2V/10.8V Lithium battery. Several outputs are available at the same time: coax on RCA, coax on true 75 Ohms BNC, AES/EBU on male XLR, optical on Toslink (Toslink is guaranteed to operate up to 96kHz, though got operation up to 176.4kHz on certain setups), optical on ST (for high-speed operation up to 192kHz and up to 1.6km or 1 mile), straight I2S for direct connection to DIY DACs on RJ-45 (NOT plug-in compatible with NorthStar products!).

All outputs, except straight I2S, are galvanically isolated (coax and AES/EBU via a pulse transformer). AES/EBU output can be set to professional or consumer mode by an internal jumper. In addition, an input for an external clock is available, for those who have an extremely precise and stable clock generator to be used with hiFace Evo.

This hiFace evo automatically recognizes the presence of the clock on its input and switches on it whenever available. This input is also galvanically isolated via a pulse transformer. Three LEDs indicate power, external clock presence and incoming data from the PC. Connection to the PC is via a type B female USB connector.

M2Tech E-EVO Features

  • Most audio interfaces and USB-provided DACs refer the data stream clock to the same USB interface clock that often suffers a very heavy jitter (short range oscillator frequency variations)
  • Thanks to two quartz precision oscillators used on M2Tech hiFace, clock source for output data stream features a very low jitter. A more stable clock is recovered by DAC S/PDIF receiver; a low jitter produces a very limited sound image distortion and degradation
  • Phase noise (main responsible for jitter) is also very low: this guarantees a short and long range clock stability, also reinforced by a board supply voltage regulation
  • The standard audio drivers available on the market (e.g. Microsoft Windows operating system) dictated constraints can be overcome thanks to hiFace proprietary drivers
  • hiFace proprietary drivers allow for transferring audio data, maintaining the original file quality without any loss of resolution quality; also, sampling frequency constraints are overcome, while Microsoft and ASIO drivers oblige to operate at no more than 96 kHz
  • M2Tech hiFace features a very compact size and can be directly (or using an accessory USB A-A adapter, not supplied with hiFace) connected to a High Speed USB 2.0 port of any computer
  • A very high electric and mechanical performance RCA gold connector provides an output signal, ready to be connected to a Hi-End system. No external power supply is required, as hiFace draws its power from USB bus itself and regulates it with its internal regulators
  • hiFace USB interface connected to a last generation mini PC provided with a High Speed USB port makes for a complete music transport system at very low prices
  • Such system allows for listening any density and resolution music files, playing own CD's using a CD ROM drive, obtaining access to more than 10,000 web radio, many of which broadcast their transmissions with CD quality

M2Tech E-EVO Specifications

Sampling frequencies 44.1, 48, 88.2, 96, 176.4, 192 kHz
Resolution 16 to 32 bits
Inputs USB 2.0, supply, master clock
Outputs S/PDIF: 0.5Vpp +/-0.1V @ 75 Ohms
AES/EBU: 2Vpp +/- 0.2V @ 110Ohms
I2S: 3.3V (LVCMOS)
Bit Rate TOSLink Input: Up to 15Mbps (up to 96kHz sampling frequency)
Wordclock External Voltage: 3Vpp to 3.6Vpp
External Frequency: 10 to 25MHz
External Input Impedance: 75 Ohms
Internal Clock Precision: +/-10ppm 32deg. to 140deg.F (0deg. to 60deg.C), 2ppm typical @ 77deg.F (25deg.C)
Power Requirements Power supply not included
7 to 11VDC (15VDC max), 140mA @ 9V (idle, no output loaded)
2mm tip jack connector
System Requirements 1.3GHz CPU clock
2.0 USB port
Dimensions (W x H x D) Case: 105 x 46 x 104mm / 4.13 x 1.81x 4.09"
Total: 105 x 50 x 142mm / 4.13 x 1.96 x 5.59"
Weight 380g /13.40 oz
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