Aqua Formula silver demo

  
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Like new Aqua Formula DAC - silver
Excellent condition, original packaging.

What exactly is Optologic, and why is it so special? Aqua's Cristian Anelli states that "Galvanic and magnetic isolation are implemented between the FPGA and the four branches of the R2R ladder converter. This not only creates complete isolation of all digital circuitry including the clock from the analogue section for a pure clean ground plane. It also plays a vital role in the differential management of the R2R ladders, achieving perfect symmetry between the counter-phase halves. The result is high tonal contrast and naturalness not heard from digital machines.

"But it's not merely about the usual 3D markers and how precisely and widely spaced they are. It's about an added dimension. That accesses 
the emotional mood or climate of the playback scenery. Whilst costlier decks came through earlier, none of them did it at that potency. " - Srajan Ebaen, Sixmoons.com

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 and with BJT, Mosfet, Jfet and ultra-fast diodes. Passive parts were selected not just for sonics but top quality, longevity and reliability. Except for six extreme-quality electrolytics, all other caps are Tantalum, solid-polymer OS-CON or double-metalized MJP. The signal path itself is direct-coupled and free of all capacitors. The dual output stages—one single-ended, one transformer-coupled balanced—use discrete BJT and JFet with metal-film resistors. All parts are characterized by very low RF noise."

"Finally there's this peculiar easy-digital aspect as though your brain's usually active aural processor went on holiday because it's not needed. 
As such, I must highlight Aqua Hifi's Formula with one of our sparsely administered awards. True, it's serious money. But it's seriously well
built. And it delivers very serious performance. Yet all this multi-stage seriousness melts away when one is faced by such deep holistic 
listening satisfaction. " - Srajan Ebaen, Sixmoons.com