OPTO•DX is back in stock!

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

Sound Quality is a Corollary for 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...

My Listening Room Setup ('A')

I have two listening areas. My primary ('A') has Voxativ loudspeakers driven direct from a Chord Electronics TT2 in a mid-field environment. IMO th...