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In Reply to: RE: V-Cap OIMP Bypass Capacitor posted by Duster on March 06, 2017 at 14:32:52
Duster, since you apparently like what the OIMP is contributing to the sound, you should try removing the MKP and running the OIMP alone. A 10uf output cap should be more than enough for even a low 10K load. In my experience, a single high quality coupling cap always sounds better than a mix of different caps especially in terms of coherency.
I have never heard a V-Cap OIMP but I am a big fan of their TFTF and CuTF caps.
If the white capacitors shown in the photo are the MKPs that the OP bypassed, I wondered whether those actually might be only 10uF value, maybe labeled "10.0 uF" with a faded decimal point. So they appear to be 100uF. (They look too small to be 100uF, unless the voltage rating is very low.) In which case you certainly don't need both the MKPs and the OIMPs in parallel. You could ditch the MKPs entirely.
I appreciate both Salectric's and your perspective, but as mentioned, there is definitely no decimal point within the 100uf markings on either of the base caps, and the cap features an atypically low 100V voltage rating for an audiophile MKP cap, so the somewhat small size for the large value MKP cap is understandable. In some cases, I don't mind going against the intent of a designer, but in this case Mondial may have had a clear reason for implementing such a large value cap, and I trust Chris VH would have recommended pulling the stock caps from the PCB in order to replace them with the OIMP caps.
I don't doubt what you say for a minute. It's just that I have some 10uF/100V metallized polypropylenes that I bought from Mouser, and they are about the same size as the capacitors I see in your photo. This means very little, of course, compared to your direct eye-ball examination of them. I have a trusty old Sencore capacitance meter that I use to resolve such issues when they occur on the odd occasion.
I've been advised that if there is a feedback line after the caps in my unit, and if there is a 100uF value in there, to move to 1/10th the value on a whim would be foolish, without first getting more info from the manufacturer. I've submitted a request for information from Indy Audio Labs who seems to be involved in Aragon and Acurus since Klipsch dropped their support.
"but in this case Mondial may have had a clear reason for implementing such a large value cap"
Only if there's a feedback line after the cap.
Otherwise the 10uf alone should be fine.
It won't hurt anything to try the 10uf alone just to hear what it sounds like.
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