Frequency response of my two way speakers, Graetz typ.5400(Isophon P2132 equiv.) and Siemens 6 Ruf lsp 28a, 6dB/oct network at 2.5kHz. Ignore red plot, see background gray plot. Gray represents peak level sweep from 20Hz to 20kHz. Connecte…

Meauring my passive LPF with 10mH inductor, to check if it matches to the LTspice simulation. I turned off the DAC, input sine wave (from 20Hz to 1MHz) to just after IV stage, check the wave form both at the input point and LPF output poin…

For my ear, this Sony’s old school TOTL DAC sounds strange, despite its non-compromise construction or parts selection. It sounds, for me, not being alive, masked, veiled. Older CDP-101 sounds much better for me. I experienced similar soun…

My best loud speaker so far, Telefunken 18x26 oval unit, circa mid 1950, in open back cabinet. Baffle size is 45cm x 25cm. My initial trial was using Graetz 21x32 unit (Isophon P2132 equiv.) as full range, and I found, though it claims res…

最近のおもちゃ、ソニーDAS-703ES。1985年製、定価25万円。 アルミの棒材が使われた筐体構造は一点ものの測定器のよう。 音質の評価はあまり高くはなく、実際CDP-101と聴き比べてもくぐもった元気のない音に聞こえる。 opアンプはチャンネルあたり5個。PCM53…