Jupiter Caps in tube preamp application

If you did it right you should hear deeper into the recording, more detail but in a smoother more natural way that may not be all that obvious at first, and this realistic smooth coherent sound will only become more natural and organic as the hours add up. That's a real good cap swap when you get that.

There are only two times anyone should be talking about tone controls with caps: in crossovers where the value does directly affect response, and when the listener isn't able to appreciate that the areas described above got better, instead noticing only the lack of grain and glare, which they misattribute to being toned down. Since you went the extra mile to check with the designer then you are quite correct to dismiss the poor listener and his misinformed tone control comment. If yer gonna mod, do it right- which includes knowing what to question and what to stand up for. Which you did. Well done.

@millercarbon, thank you for the thoughtful and respectful response. I did notice it was a bit smoother, Not to be confused with loss of detail. I will need to get more listening time in but there may be more detail. I did go from a 0.01uf to 0.022uf so there may be some effect from the value change as well. I'll keep you posted as to break in improvements. Thanks.

Jim,
I noticed an increase in bass as well with the Jupiter caps when I put them in my amp. I would give them a couple hundred hours to settle in although they do sound pretty good when first installed.

Scott 

Thank you for sharing @andirocks/Scott. Good to hear this feedback as it validates what I am hearing.

Dear @jimbones  : "   I wouldnt classify it as a tone control. I dont hear any shift in tonality or any emphasis is any one area except maybe a bit stronger in the low bass region. "

Again, all high-end/boutique caps are way colored and we like those " nice " colorations but at the end are only added distortions.

Your statement confirmit. Bass range is where belongs the home room/system foundation and through the bass notes and its harmonics puts the whole tone of those speakers, so any tiny change in the bass range response will affects all the other frequency ranges.

The only way for a cap been nota " tone control " is that that cap be signatureles and Jupiter certainly is not a signatureless cap as any other boutique caps.

The adjective smooth is an audiophile and tube lovers adjective but near field live MUSIC is everything we want but smooth.

Unfortunatelly and form many years We are accustomed to that kind of smooth sound and we like it but even that is wrong live MUSIC characteristic because just does not exist down there.

In the Humble home made.. caps comparisons Tony stated on Jupiter:

"  The Jupiter Copper-Foil Paper & Wax used as a bypass capacitor in loudspeaker crossovers creates a nice balance between warmth and detai.."

you can note that " warmth " word that is an audiophile word that does not exist in live MUSIC.

It's imposible for caps using paper, wax, oilñ and the like to starigth/signatureless because the audio signal " touch " that kind of materials that are far away to be technology not even exist white papers that can prove are the best dielectric/caps materials, however Jupiter said:

"   Our wax & paper capacitors are a blend of old and new technology ""

that old pseudo-technology came from 70 years ago when was used for radio caps. Go figure and Jupiter is not the only one that choosed that " technology ".

It's not science because a cap manufacture is not a rocket science and what I stated is only common sense.

Btw, Tony posted in his caps comparison papers:

""  The Jupiter Copper-Foil Paper & Wax seems to have everything you are looking for in a capacitor: a coherent and organic presentation, detail and smoothness come hand-in-hand, a well controlled and focussed image, rich and transparant overtones.."""



" organic, smoothness, rich.."" all are audiophile adjectives we are accustom to but that's is not live MUSIC.

Seems to me that we love audio hardware over MUSIC and could be because is what we like.

Jim, it's not a critic against you NO, is only a different way to see " things ".
That's why @millercarbon can't understand my overall take.

Btw, it's not at random that you and @andirocks  coincide in that " low bass " characteristic with the Jupiter because that's part of that colored sound because he detected the same but with his amp and you with a preamp and both in different application inside those units. That's is a coloration7added kind of distortion and that's what millercarbon can't understand or he looks in a different way. 

""  with the exception that it was just a bit hard/forward in the midrange. Looking to mellow it out a bit. .. """

well maybe you already achieved what you are looking for.
In the other side obviously that the unit designer voicing was different of what you " like " or do not like.

Anyway, enjoy it.

R.