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Aqua Acoustic Quality CD players


A relatively new company, Aqua Acoustic Quality was founded in Milan, Italy, in 2010 by product designer and CEO Cristian Anelli. AAQ released its original Formula DAC in 2016. And they have focused solely on the digital source (CD Transport, Streamers and various DACs). We are very much in favour of such a focused approached to development as this usually results in products that stand out from mainstream competitors on sound quality.


We are still convinced by the superiority CD as a digital format and will always seek out standout equipment for this physical replay. For our reference level equipment, we have the superb Luxman D-10X which presents a high bar to beat, even at multiple times the price. We believe the new Aqua La Diva Mk 2(CD Transport) and the La Scala Mark 2 (R2R tube hybrid DAC) offers an equally special sound quality but with a different flavour to the Luxman. The Aqua combination is outstanding in its transparency, micro dynamics, timbre textures and speed. Very precise and accurate imaging within a satisfyingly large sound stage, very deep and wide but with a slightly more forward and detail-focused presentation. It has a delicacy, shown especially in tone, texture and timbre, especailly on chord sustain decays, but the speed of transients and rhythmic pace are exemplary. All on a par with our reference Luxman D-10X, which could be considered to have a very slightly more lush tonal balance, with a denser sound field. 

 

Interestingly, the Luxman is utilising a newly developed DAC chip, for which the design process itself was audio quality focused for the first time, and a first in the audio world. The Luxman is the peak of ‘Delta-sigma’ (chip based) conversion, whereas the Aqua combination is using a discrete, Resistor to Resistor (R2R) DAC topology with FPGA control. These are two, opposing, conversion technologies with a common goal, and both offer truly fantastic sonic results.


We have on demonstration both the La Diva Mk2 CD Transport (newly released late 2021) and the La Scala Mk2 R2R Tube-hybrid DAC (released September 2021) and this combination offer outstanding CD replay at this price point. Build quality is of the highest level for high-end audio products together with the most elegant styling that typifies products made in Italy. 


We will be reviewing the rest of the Aqua range in due course, particularly the LinQ Network Interfaces and the Formula xHD DAC. We will report on our findings after our listening tests.

Aqua Acoustics Quality La Diva CD Transport Mk2


NEW

La Diva CD Transport Mk2

The new generation of La Diva, La Diva Mk 2, is a CD drive that, while keeping the previous name, is completely new, both in terms of CD mechanics and all internal electronics, power supply, FPGA decoding, clock, display, and more.

  • La Diva CD Transport Mk2 features

    • Latest version of the legendary, top-loading, Philips CD-Pro 2 transport (customized further by Aqua themselves)
    • High performance proprietary ISDC (Isolated Synchronous Discrete Circuit) digital decoding and clock manager
    • Custom designed discrete circuit with high-speed photo-couplers (using light) for true Galvanic and magnetic isolation between CD drive unit and digital output
    • Ultra-massive chassis construction and newly developed high-rigidity sub chassis with Nextel for CD drive unit which helps to cancel internal and external acoustic and mechanical vibrations, enabling exceptionally accurate "Red Book" RF signal
    • DC disc drive motor allows to read the data accurately and minimise jitter, with a Moplen clamp to avoid flywheel masses and vibrations
    • Sophisticated signal processing technology assures excellent CD Red Book signal
    • High-performance multi-stage voltage regulator (high-current stage for accurate servo DISC drive rotation, tracking and focus)
    • Jitter free digital interface AQlink (I2S protocol), uncompromising digital connection to Aqua’s own DACs. EtherCON RJ45 (AQlink) output connection to DAC, employs CAT6 cable can connect both RJ45 and professional etherCON RJ45. 
    • Separate custom-built toroidal transformers for digital and servo motors/actuators
    • Modular Design with upgradeable multi board system with field upgradeable firmware
    • High quality, aviation-style, rocker switches
    • High-quality parts selected for sound quality:
    • 105° long life capacitors
    • low noise Metal Foil ultra-precision resistors
    • metallized film pulse capacitor
    • ultra-fast diodes
    • halogen free cables
    • Aluminium top loading tray machined from billet
    • Non-magnetic low-resonance aluminium chassis with Nextel
    • OLED display with user off-selectable illumination
    • Designed and handmade in Italy

    Outputs:

    • etherCON RJ45 - AQlink (I2S serial bus)
    • XLR AES/EBU
    • BNC coax (S/PDIF)
    • RCA coax (S/PDIF)
    • ST fibre (AT&T)
    • BNC word clock

Aqua Acoustic Quality La Diva CD Transport Mk2 in silver or black £8,960 

La Diva CD Transport Mk2

La Diva CD Transport Mk2


La Scala MK2 Optologic DAC

The La Scala DAC is not a product designed to become obsolescent as is the case with most of the products in the high-end digital world. After its first appearance in the flagship Formula DAC, the proprietary D/A conversion system developed by Aqua (Optologic), is now available for the La Scala Mk II DAC. The La Scala Mk II keeps the Valve/MOSFET hybrid circuitry, now utilising a pair of specially selected ECC81 tubes - a High-Frequency triode - for its extremely low noise and superb transparency.


Current MK1 Owners, can upgrade their unit in order to reach to the revolutionary Optologic D/A conversion system. This upgrade improves every aspect: time coherence, micro-dynamics, timbre, and without losing that magic atmosphere for which La Scala is widely renowned.

  • La Scala MK2 Optologic DAC features

    • 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. In our experience S/PDIF inputs also offer exceptional sound quality, for those without an Aqua transport.
    • Zero S/PDIF Jitter design, digital receiver stage PLL (phase locked loop) technology
    • High-performance AQ Discrete Regulator (MOSFET, J-FET, BJT) for analogue and digital DAC’s power supply
    • Valve/MOSFET direct coupling analogue stage in pure class-A without negative feedback
    • MOSFET Virtual battery circuit for analogue anode supply delivers extremely stable power
    • Regulated DC filament supplies with soft start for valve power up for extended 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 analogue and one for the digital section
    • MODULAR DESIGN with upgradeable multi board system
    • Fully discrete analogue 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 44.1 kHz to 384 kHz PCM up to 24 bit, 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 capacitors
    • ultra-fast diodes
    • halogen free cables
    • Aluminium anti-resonant cabinet with Nextel
    • Designed and handmade in Italy

    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 Fibre) -  PCM 24 bit / 192kHz – DSD64 via DoP (optional)

    Analog outputs:

    • RCA - single-ended
    • XLR - balanced (with transformer)

Aqua Acoustic Quality La Scala MK2 Optologic DAC in silver or black £7,460

La Scala MK2 Optologic DAC


Aqua Acoustic Quality Formula xHD Rev. 2 Optologic DAC

The Formula xHD (revision 2) is the flagship DAC from Aqua Acoustic takes things up a level from the La Scala Mk 2 Optologic DAC by using better components which are summarised below. The soundstage is slightly larger in all dimensions, with an increase in the precision of imaging which is already very precise in the La Scala, and transients are delivered slightly faster.


The sound is very much the trademark Aqua Acoustic, retaining the qualities we admire in the La Scala, notably highly accurate tone and timbre to the instruments and voices, texture and detail, precise rhythmic timing and 3-dimensional soundstage – but the Formula xHD just does it better.

  • Differences between the Formula xHD and the La Scala

    DAC:

    • PCM 24 bit / 384 kHz and DSD 64 native (128 via DoP [DSD over PCM]) in the La Scala to bit perfect to 768 kHz PCM and DSD 512 native in the Formula.
    • The use of a more powerful digital decoder, using a Proprietary hybrid 2-stage XMOS xCore XE216 plus FPGA, before being fed to the R2R resistor banks for the conversion.
    • Fully-floating (isolated) USB decoding and clock generation by FPGA with proprietary code.

    Processing capability increases from:

    • PCM 24 bit / 384 kHz and DSD 64 native (128 via DoP [DSD over PCM]) in the La Scala to bit perfect to 768 kHz PCM and DSD 512 native in the Formula.
    • The use of a more powerful digital decoder, using a Proprietary hybrid 2-stage XMOS xCore XE216 plus FPGA, before being fed to the R2R resistor banks for the conversion.
    • Fully-floating (isolated) USB decoding and clock generation by FPGA with proprietary code.

    The Output stage is transformer based and true-balanced within the Formula xHD, with the output stage itself being a sizable unit utilising many, very high quality, discrete components. The La Scala uses a simpler hybrid valve/MOSFET direct coupling analogue output stage, using discrete components.


  • Aqua Acoustic Quality Formula xHD DAC Features

    Features include:

    • Proprietary Optologic D/A conversion system. Pure R2R ladder - FPGA (Field Programmable Gate Arrays) based without digital filter
    • Galvanic and magnetic isolations between the FPGA and the four branches of the R2R ladder converter
    • Jitter free digital interface AQlink PRO (I2S protocol), uncompromising digital connection to La Diva cd transport
    • Discrete R2R ladder DACs with low noise precision resistors
    • Zero S/PDIF Jitter design, digital receiver stage PLL (phase locked loop) technology
    • High-performance AQ Discrete Regulator (MOSFET, J-FET, BJT) for analogue and digital DAC’s power supply
    • 2 separate low noise C-Core power transformers, one for the analogue and one for the digital section
    • MODULAR DESIGN with upgradeable multi board platform
    • Transformer-based true balanced audio output stage
    • Fully upgradeable high-speed USB hybrid 2-stage XMOS xCore XE216 + FPGA, Fully-floating (isolated) USB decoding and clock generation by FPGA with proprietary code
    • Proprietary USB Firmware / driver :
    • Apple MAC OS - Linux OS: USB asynchronous native support, no need to install drivers software
    • Digital phase selector on front panel
    • High-quality parts selected for sound quality:

    - Tantalum, solid-polymer OS-CON and double-metalized MJP 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
    • RC5 IR remote controller (optional)
    • Designed and handmade in Italy

    Outputs

    • UNBAL 2 RCA Output 2.4 V RMS
    • BALANCED (using symmetrical passive transformer) 2 XLR Output : 3.8V RMS


Aqua Acoustic Quality Formula xHD Rev. 2 Optologic DAC in silver or black £14,980 

The quality of the La Diva/La Scala now is already stunning... The effect is just what I was trying to achieve when I started to upgrade the system 4 years ago. This journey is made easier in that the source sound quality is so high, even at this early stage of running in. I cannot believe how good the PMC Cor amp and PMC 25/26 speakers sound. The increase in dynamic range alone is massive... I seem to now have a subwoofer added to the speakers.

- Mr BD from North London

Formula xHD DAC
Formula xHD DAC

Formula xHD DAC


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