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cv wrote:

I wonder if it is the reactive components (blocking caps etc) that are to blame here, seeing as much of the problem is in the lower bass.

Look, the output of Bidat and a SS buffer that being bult for me now are direct coupled and they do “a perfect” bass. The buffers that I tried were capacitance coupled and all of them delivered identical (regardless of topology) worsening of bass. I trued the transformer coupled (amorphous Lunhale) and I lost bass as well, differently then with caps but still it was a sever lost of amplitude. The capacitors did not loose amplitude but they degenerated the quality and the definition of bass.  I did use various capacitors in there but this game I played log time ago and I know that the caps I use all were the best in existence (the same the I used in Melquiades coupling).

So, if to make a presumption that the output capacitor of the buffers was a guilty party, and this is the very same cup that is so phenomenally-good couple the Melquiades’ inner-stages then where would it lead us? Does it mean that in the “Super Melquiades” when I intend to use the same cap in the LF channel this cap will be the weakest element?  (Thanks God I have resolved the problem with the transformer). Would be a good idea do not use those caps in there but to look at something else? Perhaps a very large electrolytic cap will do better as a coupleling cap in the sub 100Hz amplifier or perhaps the back-to back electrolytics with a negative bias? Yes, theoretically in that location 6uF introduce a second order roll-off at the fraction of a hertz but perhaps there is something else in there, considering that Melquiades pumps unspeakably low bass? Perhaps it is about the shaking the dielectric or something like this?

Any thoughts on it?
The Cat

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