Thanks for making the interesting comparison video! It would be great if volume match can be achieve between the amps. Notice the the marantz 1 had a lower volume than lepy. And the marantz 2 had a higher volume than the marantz 1 hence the more open and detailed presentation. Marantz has thicker vocal. You might have the impression that Lepy 2 have a drastic improvement because you just listened to Marantz 1 which had lower volume. Try comparing Lepy 1 and 2 directly and you will notice the difference is lesser.
FA-AUDIO- のDAC,真空管,パワーアンプで組んでKENWOODのLS-NA9で聞いていましたが、意外といい音でもっといいスピーカーと思い御社からLUMINA I を購入しました。 プロショップの人は安物の音だと酔うのかと感心していましたが、LUMINA I で聞くと自分も酔いました。 価格帯合わせないと良い音に聞こえてもダメなんですね。