Les bipolarisés seraient meilleurs que le polarisés en matière de distorsion selon Cyril Bateman(à méditer).
Extrait d'un article de Cyril Bateman :
Bi-polar.
The Panasonic S Bi-polar capacitor at 0.3 volt with no bias, produced less than half the distortion of the 25 volt Silmic. Second
harmonic measured -111.8 dB, third -119.6 dB and distortion 0.00042%.
With 18 volt DC bias, second harmonic increased to -92.7 dB and distortion to 0.00237%, half the distortion of the 50 volt
Silmic.
The Panasonic S Bi-polar produced the lowest distortion of all single 100 µF electrolytic capacitors of those I tested, using a
0.3 volt signal and DC bias from 0 volt to 18 volts. see Fig.12 D/F
In my last article we saw how using two polar capacitors in series could reduce distortion. Let us now explore using two Bipolar
capacitors in series.
Two better than one?
I already had some 220 µF 63 volt Nitai Bi-polar electrolytics, Farnell 317-4906. Two connected together in series would
approximate 100 µF.
Measured at 0.3 volts with no bias, second harmonic level reduced 6 dB compared to the Panasonic S Bi-polar. With second
and third harmonics buried in the noise floor, distortion at 0.00033% measured the same as the PET assembly.
With 18 volt DC bias, second harmonic measured -105.3 dB and distortion 0.00063%. A near four fold improvement compared
to the Panasonic S Bi-polar, more than seven times better than the best polar capacitor tested.
Liens :
https://linearaudio.nl/cyril-batemans-ca...d-articles
https://linearaudio.nl/sites/linearaudio...ents_0.pdf