Testimonials

When it comes to isolating your digital chain from your analog chain, there is nothing better than an optical air gap

Ray G, USA

It's un-muffling the f*ck out of the music. It certainly feels endgame

Michael D, UK

IMHO the best way to eliminate the RFI issue completely is with OPTO-DX

Neil VM, Ireland

...much larger soundstage, better separation, better dynamics, more vivid sound - it's the best I've heard my system

Bernard H, Austria

...the reduction in noise is profound. I’ve never heard a background this black. I honestly can’t believe the sound coming from my speakers

Ken B, USA

I find it's just so easy to listen...lots going on in 3D too...the sound from OPTO-DX is pretty astounding!

Alfie M, Canada

Fantastic product...more depth and holographic representation of the music. I have truly never heard such good sound

Steve A, Australia

OPTO-DX is lifting up my system very nicely. The degree to which
I can hear the benefits on instrument resolution is striking

Cedric W, UK

It was really hard for me to believe that there was still that much more information being blurred by RF noise. The optical isolation of OPTO-DX just takes things to a whole different level

Todd N, USA

OPTICAL RF NOISE ISOLATION FOR DUAL-COAX PCM TO DX DAC

USB TO DUAL-COAX FOR M.TAPs UPSCALING TO DX DAC

ISOLATION CHAMBER FOR ZERO RADIATED RF NOISE TO DAC

Lower Measured RF Noise Equals Better Sound

We test and measure everything ...and publish the results so you can understand the 'why'

Affordable End-Game Sound

Products for a new generation of pragmatic audiophiles who want the ultimate in sound quality and value

Dan's Blog

Audiowise at CANJAM NYC 2020, February 15 & 16

If you are on the USA east coast in mid February, please come to New York to attend Head-Fi's regional headphone audio show. We will have our tri...

Sound Quality -vs- Measured RF Energy - Part 1

A proper analysis of RF energy effects in a digital audio system requires a measurement device to convert time-domain signal into frequency-domain....

My Listening Room Setup ('B')

Every OPTO•DX is signal calibrated using a RIGOL DS1104Z oscilloscope and then tested on a benchtop listening setup consisting of a Hugo MScaler to...