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Aqua La Scala MK II Optologic

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Product Description

Aqua Hifi La Scala MK II Optologic

Audiophile R2R Ladder DAC

Find Out What Your Trade Is Worth | Questions? Call 303-653-6341 or email us.


"La Scala has presented itself as one of the most beautiful and capable digital to analogue converters I’ve had in my home system." The Ear

Aqua la scala dac

Yes that's right. The La Scala MKII Optologic incoporates trickle down Optologic technology from the Formula xHD DAC, and will play back DSD via the USB input (DoP 64/128 protocol). The already extraordinary sound quality of this icon is now improved in every aspect: time coherence, microdynamics, timbre, and without losing that magic atmosphere for which La Scala is widely renowned. The La Scala MkII keeps the VALVE / MOSFET hybrid circuitry, with now a pair of selected Telefunken ECC81 tubes - a High-Frequency triode - for its low noise main feature.

La Scala MKII

The La Scala Optologic has the magical sound of the La Voce S3, where all recordings are rendered in a musical, effortless and relaxed way. The La Scala however does so with more resolution and a wider, deeper soundstage.


About the La Scala MKII Optologic

Aqua Hifi's 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

"There’s no doubt that this is the finest sounding DAC to date to grace my life/system/website with its presence."- John Darko, DAR


  • 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
  • Precision sign magnitude R2R ladder DAC with 4 Burr-Brown PCM -1704K arrayed in a true differential dual mono configuration
  • 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 10 , 8 , 7 and XP 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
  • Input:
    • RJ45 AQlink (I2S serial bus) - PCM 24 bit / 384kHz - DSD64, DSD128 via DoP

    • BNC coax (S/PDIF) 75 ohm - PCM 24 bit / 192kHz - DSD64 via DoP

    • RCA coax (S/PDIF) 75 ohm - PCM 24 bit / 192kHz - DSD64 via DoP

    • AES/EBU balanced 110 ohm - PCM 24 bit / 192kHz - DSD64 via DoP

    • USB port - PCM 24 bit / 384kHz - DSD64, DSD128 via DoP

    • AT&T (ST Fiber) - PCM 24 bit / 192kHz - DSD64 via DoP (optional)

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

Owner's Manual (PDF)

USB ASIO Driver (for Windows PC only)

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