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La Scala Optologic DAC , high-end digital-analóg konverter

ÚJ
La Scala Optologic DAC , high-end digital-analóg konverter
  • La Scala Optologic DAC , high-end digital-analóg konverter
  • La Scala Optologic DAC , high-end digital-analóg konverter
  • La Scala Optologic DAC , high-end digital-analóg konverter
  • La Scala Optologic DAC , high-end digital-analóg konverter
  • La Scala Optologic DAC , high-end digital-analóg konverter
1 990 000 Ft1990000
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La Scala Optologic DAC , high-end digital-analóg konverter

Optologic Dac

acoustic quality’s production to show a proprietary D/A conversion system, that we name Optologic Dac. This conversion system follows the same multibit technology (already used in the previous world acclaimed dacs such as La Voce and La Scala) but with a discrete R2R resistors ladder instead of Burr Brown PCM1704 dacs.

Technology

Galvanic and magnetic isolations are implemented between the FPGA and the four branches of the R2R ladder converter. This creates complete isolation of all digital circuitry - including the clock - from the analogue section for a pure clean ground plane. It also plays the main role in the differential management of the R2R ladders, achieving perfect symmetry between the counter-phase halves. The result is the highest tonal contrast and naturalness never heard before from digital sources.

The Formula Dac uses no digital filter or any other compensation, relying instead on maniacal attention to each sub circuit. The analog and digital power supplies are executed purely discrete by extensive use of BJT, Mosfet, Jfet and ultra-fast diodes. Passive parts were selected not just for the best sonic result but also for their top quality, longevity and reliability. With the exception of six superior quality electrolytics, all other caps are Tantalum, solid-polymer OS-CON and double-metalized MJP. The signal path itself is direct-coupled and free of all capacitors. The two output stages (one single-ended, one transformer-coupled balanced) use discrete BJT and JFet with metal-film resistors. All the electronics parts show an ultra low RF noise.

 

Since its introduction in 2010, the La Scala D/A converter has earned the distinction of "the standard reference in a class by itself".
With its extraordinary sound quality and stylish appearance it has remained the DAC of discerning audio enthusiasts.
Improving the sonic performance of the La Scala was no small task. The first step was to enhance the overall precision of the digital circuit. La Scala MkII inherits the innovative proprietary DFD decoding without any digital filter, assuring a pure and precise digital signal. In addition aqua - acoustic quality has developed a single-stage signal amplifier: VALVE / MOSFET direct-coupled and LED bias. It uses ECC81 tube - a High-Frequency triode - for its low noise main feature. This is directly connected to High-Voltage MOSFET to enable :
- simplicity
- wide bandwidth
- fast response
- no overshoot, no ringing, no roll-off
- lower output impedance compared to conventional circuits
- no feedback
- low distortion

La Scala MkII uses long-life valves with an average life of approximately 10.000 hours.

  • • High performance proprietary DFD (Direct From Decoder) digital decoding without digital filter for purest digital signal quality

    • Custom designed discrete circuit with high-speed photocouplers for Galvanic and magnetic isolation between Digital stage and Analog DAC ground

    • Jitter free digital interface AQlink (I2S protocol), uncompromising digital connection to La Diva cd transport

    acoustic quality’s production to show a proprietary D/A conversion system, that we name Optologic Dac. This conversion system follows the same multibit technology (already used in the previous world acclaimed dacs such as La Voce and La Scala) but with a discrete R2R resistors ladder instead of Burr Brown PCM1704 dacs.

    Technology

    Galvanic and magnetic isolations are implemented between the FPGA and the four branches of the R2R ladder converter. This creates complete isolation of all digital circuitry - including the clock - from the analogue section for a pure clean ground plane. It also plays the main role in the differential management of the R2R ladders, achieving perfect symmetry between the counter-phase halves. The result is the highest tonal contrast and naturalness never heard before from digital sources.

    The Formula Dac uses no digital filter or any other compensation, relying instead on maniacal attention to each sub circuit. The analog and digital power supplies are executed purely discrete by extensive use of BJT, Mosfet, Jfet and ultra-fast diodes. Passive parts were selected not just for the best sonic result but also for their top quality, longevity and reliability. With the exception of six superior quality electrolytics, all other caps are Tantalum, solid-polymer OS-CON and double-metalized MJP. The signal path itself is direct-coupled and free of all capacitors. The two output stages (one single-ended, one transformer-coupled balanced) use discrete BJT and JFet with metal-film resistors. All the electronics parts show an ultra low RF noise.


    • Transformer current / voltage conversion (I / V)

    • Zero S/PDIF Jitter design, digital receiver stage PLL (phase locked loop) technology

    • High-performance AQ Discrete Regulator (MOSFET, J-FET, BJT) for analog and digital DAC’s power supply

    • Valve-Mosfet direct coupling analog stage in pure class-A without negative feedback

    • MOSFET Virtual battery circuit for analog anode supply

    • Soft-start power up for extended tube life

    • etherCON RJ45 (AQlink) input connection, employs CAT6 cable can connect both RJ45 and professional etherCON RJ45

    • 2 separate low noise power transformers, one for the analog and one for the digital section

    • MODULAR DESIGN with upgradeable multi board system

    • Regulated DC filament supplies with soft start for tubes

    • Fully discrete analog stage, not even a single Op-Amp is used

    • Proprietary USB Firmware / driver :
    Apple MAC OS - Linux OS : USB asynchronous native support, no need to install drivers software

    • Fully upgradeable asynchronous USB module with resolution up to 24 bit and 192 KHz, operates with computers running OSX 10.7 and above, WINDOWS XP, 7 and 8 ASIO - WASAPI bit perfect high-speed

    • Digital phase selector on front panel

    • High-quality parts selected for sound quality:
       - 105° long life capacitors
       - low noise Metal Foil ultra-precision resistors
       - double metallized film pulse capacitor
       - ultra-fast diodes
       - halogen free cables

    • Aluminium anti-resonant cabinet with Nextel

    • Designed and handmade in Italy

    AQlink / I2S serial bus  - USB PC Audio : 24 bit / 384 Khz
    DSD/64 & DSD/128
    S/PDIF - AES/EBU : 24 bit / 192 KHz
    Supports DSD via DoP on all inputs
    USB Type B
    PLL (phase locked loop) technology 128 or 256 FS selectable
    LVCMOS level
    Proprietary Optologic DAC
    1x
    Pure R2R ladder - FPGA (Field Programmable Gate Arrays)
    based digital decoding without digital filter
    - RJ45 AQlink (I2S serial bus) - 24 bit / 384 KHz - DSD/128
    - BNC coax (S/PDIF) 75 Ohm  -  24 bit / 192 KHz - DSD/64
    - USB port  -  24 bit / 384 KHz  - DSD/64 & DSD/128
    Modular input:
    - AES/EBU balanced 110 Ohm -  24 bit / 192 KHz - DSD/64
    - RCA coax (S/PDIF) 75 Ohm -  24 bit / 192 KHz - DSD/64
    - AT&T (ST Fiber) -  24 bit / 192 KHz - DSD/64
    - Optical TOSLINK -  24 bit / 96 KHz


    • Analog output:
    - RCA single-ended
    - XLR balanced symmetrical

  • Cikkszám
    unas_536896
    Státusz
    ÚJ    
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