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I have found several sites, articles and tests on the web in which it is claimed that the CD quality music distribution format, 16bit/44KHz, is more than sufficient to preserve practically all the characteristics of the sound compared to higher resolution formats. 24bit/sample and higher sample...

As part of a study of the effects of non-linear distortions in amplifiers, I came across an aspect that left me a little perplexed. This is the way in which the THD value (and also the IMD and TD+N) of the data collected by the standard measurements is calculated. Measurement of distortions in...

Introduction In the engineering of electronic devices for music production or reproduction all designers are faced with the problem of minimizing the different forms of distortion inexorably introduced by their creations on the audio signal. They are commonly classified into two categories...

Below is a review of this high-end '90s preamp from a (lucky) friend. BUILD The Mono Preamplifier has an excellent build quality, perfectly in line with the philosophy of this prestigious Danish brand. It is worth mentioning that all Gryphon products are designed and manufactured in Denmark...

Introduction As a hi-fi enthusiast for many years I have always tried to deepen the themes underlying sound reproduction and psychoacoustics. For the latter topic, some time ago I came across the interesting book (on line here) "Premium Home Theater - Design & Construction" by Earl Geddes &...

Intrigued by Amirm's review of Anthem AVM60 A/V processor and having one unit available, I tried my hand at making quickly some measurements, to see where they fit together or not. I state that these results are very good, even if they are obtained in a less stressful situation. Amirm’s...

Some weeks ago, I helped a friend to set up its home theatre. He had to choose the best loudspeakers mix of different brands, some “home made”. Not an easy task. Among listening tests and calibrations, I made also some basic measurements and comparison with mine, based one Focal Aria 900 series...

I share with this post a review of the vintage Threshold FET Ten/e High Level preamplifier. This is a thirty years old model, built in the late 1980s by the legendary Nelson Pass and considered a reference by many sources. I tried to discover why, via measurements in different working conditions...

I share in this post the review of a vintage preamplifier, the Threshold FET Nine/e. A project by the genius of Nelson Pass, thirty years old; price was about $2500.Thus, this is not a review for a “news”; however data below could be useful to make comparisons with modern preamplifiers. This...