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75.166.28.8
In Reply to: RE: Parts Changes to Improve Imaging? posted by atkinsonrr on April 16, 2018 at 13:04:21
Thanks Tweaker. That's just the kind of info I was looking for.
Good thought re: swapping out various caps where I now have the PIO's in the DAC. Easy to do and would provide more information. Also, I'll look for places in the signal paths where I might best use the Dale RN, Takman metal films or Vishay S102. The nakeds are a little pricey for me right now.
I have upgraded input resistors in my preamp to the big white Caddock TF's. Was also going to put the TFs in the feedback position and a couple interstage loading positions in my power amp. Any opinions as to whether the Dales, Takmans or Vishays be better than the Caddocks?
Is there a particular cap that could be used for bypassing that has a reputation for imaging/soundstage? I have three Vishay MKP 1837s bypass caps in each crossover now. This was based on the Humble Homemade HiFi caps reveiw page recommendation. I see he now recommends the Cornell Dubilier 940C as surpassing the Vishay "with quite some margin". Anyone have experience with this cap?
Are there particular positions in the amp/pre or DAC that would especially benefit from bypassing the electrolytics?
I have on hand a number of Silmic electros I am planning to put into the early stage cathode bypass positions in my amp and preamp. I have already upgraded the input and output caps in the preamp with Silmics and am pleased with the improvement.
Follow Ups:
+1 on the Silmic ll's. Sounds like we are on a similar wavelength unlike some others who pan the Silmics. Looks like there are two types of people in the world, those who recognize the Silmics as being god's gift to audiophiles and those who think for some reason that the Nichicon KZ is the way to go. Not a bad cap, but not a Silmic ll, IMHO,not in the same ballpark or known universe. The H in IMHO stands for humblest by the way. The best thing about people who prefer the KZ to the Silmics is that they did the work and listened to them both in order to come to their conclusion (or delusion in this case). Have fun. T456
"The needs of the many outweigh the needs of the few or the one"
Vulcan Proverb
Edits: 04/17/18
Yup! I find the Silmic IIs give a very natural, warm, tube-like sound. Very UN-electrolytic.
The seemingly underappreciated Vishay KP1830 is a tin foil capacitor. Tin foil caps get lots of respect out there in cap opinion land. They should best the 1837 for near sure, IMO and may beat the PIO if you can use them. They put my system into the listenable range without too much whining about flaws when I put them in a dac. Very clear and natural. Extremely good treble with very natural sounding cymbals without any exaggeration of hiss on recordings which was a problem with the previous cap that I think was a different Vishay. They did not lift the treble in a way that drives me crazy(er) which was a problem with the previous cap. Highly recommended. Very inexpensive if you can find them. As to naked being too expensive I have definitely come to that conclusion a long long time ago,much to my chagrin. T456
"The needs of the many outweigh the needs of the few or the one"
Vulcan Proverb
Thanks for the tip. You are using the 1830 as bypass, I'm assuming. I just checked eBay and it seems most of the 1830's are in the PF range. What value do you use? 0.01uf? 0.1uf?
They were used in a dac and likely not as bypass caps. There are some .01 and .015 Ero Vishay caps on ebay at 63V. There are some other .1uf ITW tin foil caps dirt cheap at 100v.Kind of a no brainer at the asking price. Looks like I'm going to have to get one of them to see what it does in my dac PS. The .01 Audio Cap PPT Thetas are not crazy expensive with high voltage available. There are other tin foils out there. I checked one from Turkey and it had 1830 printed on it. The 1830 is not AKA 1837 regardless of what the vendor says so if you order make dam sure they have 1830 stamped on them. Michael Samra is a fan of tin foil if you want to contact him. He has lots of listening experience specifically with tin foil and may have some he would let go. Just guessing. Lots of reviews of the PPT theta at parts express. The tin foil experience is said to be very natural and not bright. Tweaker hates bright, lifted, unnatural,extended and sparkly highs. Tweaker does not hear bright, lifted, extended, unnatural and sparkly highs the vast majority of the time when listening to live music.
"The needs of the many outweigh the needs of the few or the one"
Vulcan Proverb
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