the new Optologic Conversion System
• High performance proprietary FPGA-based digital decoding without digital filter

• Galvanic and magnetic isolations between the FPGA and R2R ladder converter

• Discrete R2R ladder DACs with low noise precision resistors

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

• 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 44.1kHz to 384kHz PCM up to 24 bits, DSD64, DSD128, 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 with transformer
A never ending story: upgrading to the Optologic DAC

Again, La Scala D/A converter proves that an instant classic does not mean a product whose destiny is to become obsolescent, like most of the products in the high-end world.
After the first appearance in the flagship Formula DAC, the proprietary D/A conversion system developed by Aqua is now available for La Scala MkII dac.
So, current Owners, have the opportunity to upgrade their unit in order to reach to the revolutionary Optologic D/A conversion system.
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.
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 Optologic DAC
USB Audio Class 2 Driver for WIndows
Owner's Manual
Digital to analog conversion type
Proprietary Optologic D/A conversion system
Pure R2R ladder - FPGA (Field Programmable Gate Arrays) based without digital filter
Supported Native Sample Rates
AQlink / I2S serial bus  - USB PC Audio : 44.1kHz to 384kHz PCM up to 24 bits
DSD64, DSD128
Supports DSD via DoP on all inputs
DAC architecture
Multibit sign magnitude R2R ladder (upgradable)
Asynchronous USB (High Speed)
USB Audio Class 2 with Type B connector
Digital Receiver
PLL (phase locked loop) technology 128 or 256 FS internally selectable
AQlink (I2S bus)
CMOS level
Oversampling factor
Digital inputs
- 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)
Analogue Outputs
UNBAL 2 RCA Output 2.2 V RMS
BALANCED ( passive transformer's symmetrical ) 2 XLR Output : 2.2V RMS
Output Impedance
10 ohm RCA - 600 ohm XLR
Load Impedance
10 kohm (min.) RCA - 600 ohm XLR
Frequency Response
20Hz to 22kHz +0.5dB/-0.5dB
Phase Response
Linear phase
<0.1% 1KHz -20dB
Front Panel
Power, input selector, Phase Invert switch
Power Consumption
100-115V / 220-240V; 50 or 60Hz - 58VA
( W x D x H ) 450 x 370 x 100 mm
9 kg
Front finish
Satin Alu Silver or Satin Black
Case finish
Grey Nextel powder coated

It's testament to Cristian Anelli's customer support ethos that the now middle model in their converter line benefited so rapidly from the R&D behind the flagship Formula and its FPGA-controlled discrete resistor ladders. It's a very concrete benefit of Aqua's modular approach. Existing owners get to enjoy the company's IP advances without the usual sell/buy routine. Keep what you already have; bolt on real not cosmetic go-faster mods as they release. Anti obsolescence protects your valuable hifi investment with more current tech. Especially with fast-moving digital, the Joneses relocate a lot. Keeping up with them requires eyes glued on the ball. Aqua's policy doesn't drop it. That deserves applause. An already widely accoladed converter just became even better. It's a most excellent place to invest your next upgrade grand into!

Srajan Ebaen

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"Back in March 2014, Aqua Hifi’s visually unassuming La Scala MKII D/A converter not only took out a DAR-KO Award but landed pole position on the Darko DAC Index, beating out contenders from AURALiC, Resonessence Labs and PS Audio....

In other words, the most satisfying DAC heard by yours truly to date just got significantly better. Modularity coupled to a manufacturer upgrade programme brings owners of existing La Scala MKII in from the cold (should they wish to).

In its Optologic incarnation, the La Scala MKII cements further its position at the very top of the DAR-KO DAC Index and DAR-KO Award assignation becomes as easy as it has ever been. In a word, primo!"

John H. Darko

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"But not only existing customers profit from the additional efforts that Aqua has invested in La Scala, because even those who do not yet own one of the noble Ladder DACs can be convinced by the Italian qualities." (TRANSLATED)

Philipp Schneckenburger

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"While I'm not quite ready to sell my analogue gear, La Scala MkII is a fantastic product whose warm sonic embrace I can't imagine anyone in their right mind describing as "digital". It does have a sound though: It's wonderfully musical, inviting, enveloping, and entrancing."

Ola Björling

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"Yes, LaScala slightly boosts intonation, yes, it feels it, it's his own enthusiasm, but if you want that very not-conveyed "attracter", then this is one of the most vivid examples of such an approach in the High End. Practically exemplary implementation of the music, in combination with the overall high class of reproduction. My best recommendation." (translated)

Yuri Volobuev

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"You can not do much better! The La Scala Optologic is one of the best DACs I have ever heard." (translated)

Christian Möller
AUDIO Magazine

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