A few years ago, when I was building amplifiers based on the Accuphase, I always thought than something in that constructions could be done better. Already having experientc with pervious amplifiers I designed amplifier inspired by the Accu p4100 witch my own improvements, without compromising. After a few months of work I made a prototype, not specially published to a wider group, we could say to the drawer. The idea was to eliminate all unnecessary wires. On one PCB with dimensions of 100 x 275 mm there is a main power supply, rectifier bridge, amplifier, an "instrumentation amplifier" and an XLR socket. The only cables are from the transformer to the PCB and the output signal. Another modification was the use of a better power supply for the input stage and OPAmp. Amplifier works in dual mono. The feedback signal for servo is connected directly from the speaker terminals covering the entire amplifier. The transistors were paired to values as close as possible to each other.
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Looks nice, I like the copper bars that distribute current to where's needed. That's great.
I also like the minimalist approach. I have a DAC source, DC-coupled internally, nice ribbon XLR's, and a 2-gain stage amplifier (Aleph J).... so there's one capacitor in the whole chain -> in the speakers' x-over. Stunning, scary, beautiful, enveloping, fast, relaxing with a true depth perception of the soundscape.
I also like the minimalist approach. I have a DAC source, DC-coupled internally, nice ribbon XLR's, and a 2-gain stage amplifier (Aleph J).... so there's one capacitor in the whole chain -> in the speakers' x-over. Stunning, scary, beautiful, enveloping, fast, relaxing with a true depth perception of the soundscape.