The nicest 8-channel D/A converter

Analog performance redefined

Analog topology by Okto Research employing high-speed fully-differential operational amplifiers results in exceptionally low harmonic and intermodulation distortion. Our approach to power supply design renders extremely clean analog output, free of undesirable RFI and with undetectable level of mains harmonics.

Measurement below shows the analog output of the DAC8 PRO with volume set to -2dBFS receiving a 1kHz signal from a budget USB-SPDIF adapter. It was taken using a Rohde & Schwarz UPV audio analyzer.


Analog performance

0.000032% / -130 dB full-scale THD (Total Harmonic Distortion)
0.00011% / -119 dB full-scale THD+N (Total Harmonic Distortion + Noise) or 119dB SINAD
125dB dynamic range (20Hz - 20kHz)
0.000224% / -113 dB THD+N @ 100mW into 32 Ohms headphone output

Digital connections

USB (asynchronous, UAC2.0 compliant) 8-channel I/O, up to 192 kHz / 32 bit, DSD128 or DoP64
4x AES/EBU (resampling-free, up to 192 kHz / 24-bit)

Analog connections

8x XLR balanced, 4.1V RMS differential
6.3 mm (1/4") headphone output (routed from channel 1 and 2)

Additional features

Designed to directly interface to amplifiers
Per-channel volume
Routing matrix
Choice between 7 PCM reconstruction FIR filters
Configurable auto on / auto off
Configurable display timer 
Remote control learning 
Trigger output (pulse / continuous)
2x 2.42" OLED displays


448 x 183 x 50 mm excluding feet (user removable)
Weight: 4.5 kg (10 lbs)


120 VAC or 230 VAC
Power rating: 15 W


2 years

Designed and made in Prague

From CNC machining to PCB assembly, Okto Research products are built for you in the heart of Europe 


Available in silver and black front panel finish. The unit comes with a 120V or 230V power supply according to the country of order. Delivery time for the new orders is 1-2 months.

Apple Remote

Practical, reliable, beautiful. While the DAC8 PRO can learn commands from any remote, we recommend the original Apple Remote. Comes paired with the unit.

Rack mounting brackets

A pair of custom designed brackets that allow the DAC8 PRO to be mounted into a 2U rack position. Equipped with a soft padding to protect the unit from scratches.

Contact us

We will be happy to answer your questions