« Reply #15 on: September 19, 2006, 11:34:05 AM »
Why do you think electrolytics are suspect? I use them all the time and find them 100% reliable. Of course, I am using blackgates, jensen 4-poles, and panasonic fc series so I am spending a lot of money on them too, but the improvement in sound quality is far from subtle.
I am saying that electrolytics are suspect *if they are not polarized* with a positive voltage.
A "good" scenario would be a blocking cap with a voltage of +48VDC (phantom power) +/- 0.1VAC (mic signal).
A "bad" scenario would be a blocking cap with just an AC mic signal on it (eg., mic or line, but without phantom power). In this case the voltage would fluctuate from a small positive to a small negative value.
Since electrolytics only "work" with positive voltage across them, I would be worried. But to be honest, I don't know exactly what the effect of putting a negative voltage is. Ideas welcome on this.
Richard
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Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
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