In the first installment of this series we had a look at the noise generated at the output of a number of easy to build and cheap voltage regulators: single-chip series and shunt regs (LM317/337 and ...

Fashions come and go and that's as true of hi-fi as any other part of our lives. When recorded sound was first invented, the sound was amplified by horns until somebody invented the moving coil type ...

North Star, with its digital equipment, and specially with the pair M192 CD-Transport + Model 192 DAC, has gained appreciation in the field from "fine hear" and budget conscious audiophiles.

20 is a magic number for HiFi amplifiers. Many budget good-sounding amplifier had (or still have) that number has a part of their name. Just to name few examples: the Rotel 820 and 920 (plus various ...

Frequency response: Less than +/- 0.5 dB deviation 20Hz-20kHz Phase response: Less than 5 degrees deviation 20Hz-20kHz, or less than 2 degrees deviation 20Hz-20kHz, depending which Consonance/Opera ...

Recently there has been quite a discussion on the TNT forum regarding bass performance. One correspondent asked whether a piano got down as low as 50 Hz and it made me realise that most of us don't ...

The above schematic comprises almost anything you can put around the ubiquitous LM317 positive 3-pin regulator (LM337 for negative voltages, 117 and 137 military versions). The basic circuit dispenses ...

The design of a DAC has been in my dreams since a long, long time. On one side I knew that it is not easy at all to find DAC components on a non professional basis, and on the other hand I have never ...

I've bemoaned the lack of originality in valve amps more than once in this august publication. It seems odd that the majority of the better valve amps are based around 50+ year-old valves and circuits ...

OPPO is a big name in DVD and Blu-ray players. They have a tremendous reputation for affordable quality and innovation. OPPO players are manufactured in China and distributed in USA by OPPO Digital ...

JoLida has been in business as a manufacturer and supplier of various electronic parts since 1983. In 1995, they had designed and built a large transformer to a customer's specification that was ...

The brand Vincent + T.A.C. has its origins in Germany, the country famous worldwide for paying attention to quality and for the extreme care put into the manufacture of its products. It is still a ...