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 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

etherCON RJ45 AQlink (I2S serial bus) – 24 bit / 384 KHz
AES/EBU balanced 110 ohm – 24 bit / 192 KHz
BNC coax (S/PDIF) 75 ohm – 24 bit / 192 KHz
RCA coax (S/PDIF) 75 ohm – 24 bit / 192 KH
USB port – USB port – 24 bit / 384 KHz – DSD/64 & DSD/128
AT&T (ST Fiber) – 24 bit / 192 KHz (optional)

Analog output:
RCA single-ended
XLR balanced with transformer
Native Sample Rates Supported S/PDIF – AES/EBU : 24 bit / 192 KHz
AQlink – I2S serial bus : 24 bit / 384 Khz
Asynchronous USB (High Speed) USB Type B
Digital Receiver PLL (phase locked loop) technology 128 or 256 FS internally selectable
AQlink (I2S bus) CMOS level
Digital filter Proprietary DFD (Direct From Decoder) digital decoding without digital filter
Oversampling factor 1x
Digital to analog conversion type Multibit sign magnitude R2R ladder (upgradable)
Analogue Outputs UNBAL 2 RCA Output 2.4 V RMS BALANCED (symmetrical output) 2 XLR Output : 4.8V RMS
Output Impedance 100 Ω RCA – 200 Ω XLR
Load Impedance 10 k Ω (min.)
Frequency Response 20Hz to 20kHz +0.5dB/-0.5dB
Phase Response Linear phase
THD + N <0.1% 1KHz -20dB
Front Panel Power, input selector, Phase Invert switch
Power Consumption 100-115V / 220-240V; 50 or 60Hz – 58VA
Dimensions ( W x D x H ) 450 x 370 x 100 mm
Weight 9 kg
Front finish Satin Alu Silver or Satin Black
Case finish Grey Nextel powder coated