Volume 4

The case for subjective listening tests
The “Terrible Twins” – a push-pull amplifier with solid state pentodes
€19,90 

Volume 2

Zen -> Cen -> Sen - Evolution of a Minimalistic IV Conversion Circuit
Simple Loudspeaker Correction Filters
€19,90 

Volume 0

The Mini-Simplex
STEREO - From live to recorded and reproduced - What does it take?
€19,90