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Our objective is not to chase arbitrary bench measurements for the sake of specifications alone, even though our amplifier comfortably outperforms most standard products on the market. While we possess the engineering capability to force even lower distortion figures on paper, we deliberately choose a different path.

Our true focus is the emotional energy and vitality that music conveys, which can not be calculated by any machine, rather than achieving the lower possible THD or the wider frequency response. To capture the true soul of the music, we willingly accept trade-offs in conventional technical data when it serves the ultimate listening experience.

Ken Uesugi
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OTOMON LAB [Limited 1] 71A/205D drive VT62/50 compatible tube amplifier all early UTC transformer

This is Zero NFB, pure class A1 tube amplifier

This is only 1, no the second same one, made by Uesugi Ken, OTOMON LAB.

You can use both VT62 and 50 tube on the power stage, use both 71A and 205D on driver stage. You can request to change input to 100V, 117V or 230V

Tubes are included with the amp but no warranty for the tubes.

I will include VT62x4, 71Ax4, 5U4x2 tubes with the amplifier.

This was special made for vintage speakers but of course you can use it with modern speaker which has sensitive higher than 90db

All transformers except power transformer are 50s year early UTC ones.

The sound is very close to Western Electric sound. Rich, dark and very musical.