Hi again folks group....
For the guy is not too tired of the $$%#?&*&(&%$?$?%$? question caps and modification and DC biais, I have pass today , 3 hours in master Mr Solen (Denis ) in person and I have a high level grade discussion with my DC biais , cascade caps, type of caps, etc. in regards of any argumentations points keeped in this great forum...
The point relevant of this strong discussion is:
1--- The nature of caps is determine the nature of problem....
>>>>I have always thought that might be the case based on testing and empirical investigations, ie green caps (electrolytic versus mylar/polyester versus polyrpopolyene)
the electrolytic cap have a rise time more than 3 v / second !!!
for comparison; the polyster is 1 v/s the polypropylene metal is 100 faster .01/s
and film and foil is 10 more faster: ,0001 /s.
No surprise the dc charge is preload the electrolytic caps and minimise the memory of caps!!! It is asolutely non accurate nature of this type of caps who create obligation to build new design (dc biais) for update element... But the dielectric value is not changed and the quality of caps is not equal to better "fast caps"...
In a paper by Marsh there is a description of biasing of caps in cvarious locations of a typical amplifier and the tweeks that are applicable, electro reverse polarity with bias voltage, bypass with film etc. Typically biasing yields the most improvement with poorer dielectric
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2--- the DC charge biais is appeat is non complete cncept because for the ideal situation , normally your charge DC positif a one pair of caps and you put a other pair of caps in parrallele with negative Dc charge. In this, the AC power is start at 0... But it is relatively absurd to apply this circuit with good fast caps because non signfiant improvement appear...
Perhaps you can conduct and experiment on the above.
The reason of this circuit is introduce is according directly by the fact of the cheap caps in DC charge is less cost of the high level caps... (Solen point of view).
That would appear to be a good economic outcome.
3--- For the question of the multibrin in caps lead...Solen is produce this type of caps but cut the production rrapidly because the first problem of this type of lead is infiltration of air inside of caps.... So in 2 years the caps loose big part of accuracy by corrotion....
4----
each soldering is consider with a problem... so put 3 caps in same point contact in parralelle is realy better than 3 independant soldering in parrallele.... the soldering cancel the interest of finest caps cascade...
5----
For cascade question, the bypass is work in very high level frequency resonnance and not really important in regard of nature of caps...
for exemple 3 types caps and 3 types values insert in circuit 6 types of resonnance and reactance... yes! you hide a signature but you hide signal too !!!..
A solution of economic rationalism and diy morphs but not the best hifi solution.
but f you put low value film and foil , your time frequency in regards in time domain is appear probably better because you insert the highest caps reactance available...
Yes, with an obvious example...typically a large time constant like 220uf and 10k will have a reactance at a very low frequency..the key then is to bypass with a low value film capactor (0.047 or less) to counteract the performance that trails at higher frequenencies.
ex: in high section is better to put 4 value film and foil in this regard than dc charge with biais and bypass...
I'M COMPLETEY DESTROYED !!!!
one side great feeback in go in a specific way...
Other side one specilist who provide 2000 OIM where prestigious Avalon, krell, totem, Wilson, etc, etc, etc,
final touch !!! Solen recognize any insert parts is altering circuit but it is not shure in the good way !!!....
Most capacitor companies claim to be OEM to major speaker companies.
$%$&?%&&*? of course i very happy of my solutionbecause ton of caps in there... 600$ for each speaker...
More ???
---- The distance where you soldering lead caps altering the value
---- the master problem of crossover, (if you consider you runed with good solen caps.) is the cable link!!!
SHIT!!! I have feeling is flashback in apocalypse now film...
I hope you appreciate this interview report...
if anybody have other documented point of view, I'm shure the forum member and me is strongly appreciated...