Aqua Acoustic Formula



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 by extensive use of BJT, Mosfet, Jfet and ultra-fast diodes. Passive parts were selected not just for the best sonic result but also for their top quality, longevity and reliability. With the exception of six superior quality electrolytics, all other caps are Tantalum, solid-polymer OS-CON and double-metalized MJP. The signal path itself is direct-coupled and free of all capacitors. The two output stages (one single-ended, one transformer-coupled balanced) use discrete BJT and JFet with metal-film resistors. All the electronics parts show an ultra low RF noise.


Sample Rates Supported AQlink / I2S serial bus – USB PC Audio : 24 bit / 384 Khz
DSD/64 & DSD/128
S/PDIF – AES/EBU : 24 bit / 192 KHz
Supports DSD via DoP on all inputs
Asynchronous USB (High Speed) USB Type B
Digital Receiver PLL (phase locked loop) technology 128 or 256 FS selectable
AQlink (I2S bus) LVCMOS level
Digital to analog conversion type Proprietary Optologic DAC
Oversampling factor 1x
Analog Conversion method Pure R2R ladder – FPGA (Field Programmable Gate Arrays) based digital decoding without digital filter
Digital inputs – RJ45 AQlink (I2S serial bus) – 24 bit / 384 KHz – DSD/128
– BNC coax (S/PDIF) 75 Ohm – 24 bit / 192 KHz – DSD/64
– USB port – 24 bit / 384 KHz – DSD/64 & DSD/128

Modular input:
– AES/EBU balanced 110 Ohm – 24 bit / 192 KHz – DSD/64
– RCA coax (S/PDIF) 75 Ohm – 24 bit / 192 KHz – DSD/64
– AT&T (ST Fiber) – 24 bit / 192 KHz – DSD/64
– Optical TOSLINK – 24 bit / 96 KHz
Analogue Outputs UNBAL 2 RCA Output 2.4 V RMS
BALANCED ( passive transformers symmetrical ) 2 XLR Output :
Output Impedance 3.8V RMS
Load Impedance 10 Ohm RCA – 600 Ohm XLR
10 kOhm (min.) RCA – 600 Ohm XLR
Frequency Response 20Hz to 22kHz +0.5dB/-0.5dB
THD + N <0,016% 1KHz -10dB
Main processor STM-ARM microcontroller
Control connectors RS-232 D-SUB 9-pin connector
Front Panel Power, phase invert, mute, input switch, RC5 remote sensor
Power Consumption 100-115V / 220-240V; 50 or 60Hz – 82VA
Dimensions ( W x D x H ) 450 x 380 x 100 mm
Weight 9 kg
Front finish Satin Alu Silver or Satin Black
Case finish Grey Nextel powder coated