Vacuum tube Headphone Amp-DAC

The Sennheiser HD 650 is a great headphone with a little bit of sonic ‘magic’ appeal. The attractively priced MassDrop HD 6XX version is a special bargain.

A popular and nice match for the Sennheiser HD 650 / HD 6XX is a vacuum tube headphone amplifier.

The project here was built by Jeremy Young. It was inspired by the Bottlehead OTL headphone amp, but circuit ‘operating points’ were determined to suit a locally made power transformer.

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Kenwood L-07D tonearm

This extraordinary tonearm was fitted to the Kenwood L-07D turntable, the legendary flagship Direct Drive turntable manufactured by Kenwood from 1979-83.

This was the halcyon decade or so, when Japanese hi-fi was at a peak of industrial and electronic design and engineering.

Those were the days when analogue hi-fi was at a high point, with many Japanese companies participating and leading the innovation.  Sadly, some of those great names no longer exist – eg. Fidelity Research, Sansui, Stax, Supex, Coral, Grace, Micro Seiki,…. Continue reading