Vacuum tube buffer Cuculo-tube
Cuculo series derives from the cuckoo played by a clarinet of Beethoven's symphony No.6. Cuculo series is the peripheral device. I combine a Cuculo series with a Raicho series and have the quality which is just used and the design. A Cuculo series has the width of the 119mm. For a Cuculo series,there are no screws in a front, a surface and a side.
Since the output impedance of a general preamplifier is about 1 kiloohm and the input impedance of a power amplifier is 47 kiloohms,
the loss due to impedance mismatch is 2.1%.
If you use Cuculo-tube between the preamp and the power amp, the loss will be 0.21%.
Ignoring impedance matching rather increases loss.
Cuculo-tube uses a tube buffer circuit. The tube is a low μ triode 12AU7 and the European name is ECC82. It features dynamic and low noise. The powerful bass and overtones peculiar to vacuum tubes are beautiful.
Top panel: Natural stone "Emerald Pearl"(made in Norway)