Monday, May 8, 2023

Signal path of previous Pleiades 2N3053 in stereo post

Signal Path:The Alan Parsons Project The Definitive Collection CD - Sony CD Walkman D-EJ758CK 300 Ohms line out - 2 monoblock Pleiades 2N3053 - 2 (hand made) KEF CS-5 constructor series speakers with tweeter minus terminal connected to minus of speaker terminal - 1.7m x 3.2m listening room with all 3 doors open, back of speakers facing the double door, total area of lab about 100 meters squared, loudspeakers separated by 1m, on top of different cushioned chairs with springs, listener distance 1.4m. Power consumption must be just a total of 20mA at 24V. Sound quality: Hard to stop listening, If I could change your mind track sounds into cliping and too loud, much else like velvet, deep, easy, HF extended with creamy midrange and deep sound stage, sometimes too loud after a few hours I got tired, volume control should be reduced. Left, right spakers now corrected. Listening to Alan Parsons Sound Check 2 CD, more lifelike than commercial recordings. It is somehow hard to detect distortion with this amp even if it might be clipping, as the non linearity knee seems very gentle, so distortion of low order as it is just a single stage amp with almost no feedback, just a bit local from C to B. Still do not know at such level of sound quality if i prefare mono to stereo. Mono is better if one listens to the difuse sound field in other rooms. This 1920's topology implemented with a small transistor may be miraculous. Commercial recordings may sound too good to be natural. On the other hand for example the pipe organ on the AP CD sounds like being in an English church with the great long reverberation surrounding us. Pedal bass D does not sound creating intermodulation with upper parts of harmony. The train can burst you into laughter especially the squiking brakes.

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