That B1 tail works in SE, taking advantage of the previous stage DC level to center. Its an SE phono. Simple is good, but make no simpler than necessary, as some German physics guy said once. Meaner first, and then step down to savor the changes. Cross fingers they will even work in the first place.
Go back and press on the link again. I fixed it. Loud festival. You can see the line arrays on the intro video too. Its done in MesseKassel.
Well, i will not go simpler then the Hiraga but plan to improve it even further. It has low level detail in the sound that many more complicated circuits do not have. I am now convinced that conventional high feedback in the input stage of a phono amp is not the best solution. I got -110dB distortion exponentially falling in my low Z MPP just by careful design. I am very dedicated to make my high Z MPP good. I think i found a good compromise there. The icing of the cake would then be a symmetrical with low noise and fully symmetrical RIAA. The symmetric circuits i see here have still some unsolved common mode problems. I would build that circuit than with REALLY good components like wet Tantal, Teflon caps, Naked Z foil and so on the way i learned in the High Tech industry where performance and reliability was all. Well think about one year more of research. I am dedicated to build my dream stage because it simply does not exist. I would be much to expensive to make commercially. I think DIY can be better then commercial when i see some fine examples here. The High End is in a bad state. Everybody is confused because everything is great. It is really easy to get good reviews if you have the cash for advertising and socialising. This is so much fun here then my day job. And i have luck. I can more or less design what i want but there are still so much compromises to make.
The professional speakers industry is very learned. Impossible tasks to meet and combine. Plus mechanical integrity, rigging, the real McCoy. Those arrays do classical as well. No creative plumbing by using ''planar wave'' guides for compression drivers. Flat elements. That is why they are rigged straight in the intro vid.
my first "real" job, i mean with payment was in DIY in 1981. I was always a DIYer by heart. Just did not find the time. It is so much more satisfying to do everything myself. I even have an idea for a DIY resistor and i have a really fantastic idea for a coil. I was at Mundorf, ETM and Intertechnik and even for money they where not prepared, or able, or interested to make it. This busyness (High End) is very conservative although everything is High Tech of cause. I thick front plate is much more important then an innovative circuit when a 25 cent op amp can do the job just fine. Put an NE5534 in a potted case, bias it into class a and it would pass all Audio Precission test stations in this world. It´s that easy to make something that measures near perfect but would it sound like music ? maybe
Actually my friend Jürgen Ultee designed the Duelund resistors. They are from carbon rods. My design is again a chaos, fractal. Just pushed together wire type "100" from Isabellenhütte made here nearby. That wire is non magnetic and that company is so old they must have made swords in the middle ages.
Wherever there are French L-Acoustics and a good show production team there are chances to be sock and awe.
There is order in chaos, its only strangely cyclic. Natural world and life bootstrapped out of chaos. So you may actually have a great natural resistor in hand.
PP tube amplifier
this is a swiss design.
well actually i have a more philosophical idea that too much symmetry is no good for life. Perfect symmetry is dead. I found that when i layout my cables in a way they fall into their natural position they sound better. I just lift them from the floor and let them fall gently. I also found that too much dirt is not good but sterile rooms are even worse sounding. Maybe time is asymmetric. It pushes everything forward and allows no rest.
this is a swiss design.
well actually i have a more philosophical idea that too much symmetry is no good for life. Perfect symmetry is dead. I found that when i layout my cables in a way they fall into their natural position they sound better. I just lift them from the floor and let them fall gently. I also found that too much dirt is not good but sterile rooms are even worse sounding. Maybe time is asymmetric. It pushes everything forward and allows no rest.
