Dan's Blog

Dan's Reference Digital System - November 2020

Dan's Reference Digital System - November 2020

Finally! It's now completed. Download the PDF here and please contact me with any questions. I've been evolving this reference system over time (TT...

A Glowing Testimonial for OPTO•DX and RF•STOP Filtered AC Cables

Thanks to Albert O. from Laguna Niguel in California! I have a BluMk2 and Dave. I used Wave Storm BNC cables between them and thought that was the ...

Testimonials and Listener Impressions drive Audiowise Marketing

With the total lack of audio trade shows compounded with the restrictions on social contact, promotion of my product line has been relegated to wor...

A Well Shielded Cable is a Lousy Antenna (and a Good Cable!)

Misinformation and confusion still persists among audiophiles regarding the benefits of cables. Numerous product briefs and postings explain why ca...

An Endgame Amplified Setup

(Updated October 5, 2020) This is my take on a proposed endgame system for DX compatible DACs driving amplified speakers. It uses my full gamut of...

All Cables (Including Power Cords) are Antennae!

All Cables (Including Power Cords) are Antennae!

My pragmatic analysis of causal effects as described here clearly shows just how far you need to go to extract maximal sound quality from a digital...

A New Setup for Reference Playback

A New Setup for Reference Playback

This is my personal listening space as of April 2020. It's a Chord Hugo TT2 (and occasionally Dave) based system using OPTO•DX and SRC•DX driven f...

The 'Best' Source Input? - Part One

The 'Best' Source Input? - Part One

This post for is the data junkie who likes objective comparisons—in this case using quantitative measurements to indicate which DAC source input of...

Sound Quality & RF Noise - Out of Band Energy

Sound Quality & RF Noise - Out of Band Energy

Audio analyzers like the Audio Precision APx555 measure the analog output signal of DACs within the 'in-band' range of 20Hz to ~20kHz to ensure the...

Notes from CanJam NYC

Notes from CanJam NYC

This show was a coming out for Audiowise ...and the first show of many I plan to attend. As with most things audio that deal with sound quality, i...

Sound Quality & RF Noise - Part 1

Sound Quality & RF Noise - 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...