Output Capacitor Upgrading Questions

I noticed improvements along the same lines with mine and a slight looseness in bass with a kind of funny buzz to occasional bass notes on some jazz recordings I thought my headphones might even be damaged this all tightened up after about 60hrs and the buzz became more defined and developed into a resonance sound from a plucked double bass string wow!

I have been very pleased with the JFX film caps and the improvements they given. 

 
When i first installed the .1uf Russian teflons into my S.E.X. amp i noticed a distinctly unpleasant resonance in the range of cymbols and other percussion instruments making them sound harsh and distorted.  It did go went away with some use.

Interestingly with the 1.5uf Mundorfs i never noticed any
 
Free,

The reason to upgrade is getting a better sounding cap in there.  The stock electrolytic has a lot of capacitance for its size.  The film replacements are a whole 'nother animal.  They are larger for the capacitance value but much better sounding.

Try breaking them in before you install them.  Put them across an amplifier's speaker leads at a normal volume level for a week.  This will put a greater current through them than when used as a coupling cap.
 
 
When i first installed the .1uf Russian teflons into my S.E.X. amp i noticed a distinctly unpleasant resonance in the range of cymbals and other percussion instruments making them sound harsh and distorted.  It took about a week of daily use for that to go away, and they were pre burnt for a week as per Graingers advice.

Interestingly with the 1.5uf Mundorf output caps i never noticed any change from them, they were instantly clearer and more transparent and haven't seem to have change over time.

I do find it odd this whole burn in phenomenon, i've even seen similar changes from amps after replacing all the resistors, or anything freshly built never sounds right until you leave it running for some hours.  I'm not quite ready to believe cables need burnt in, but there is something mysterious going on i dont understand.
 
Grainger49,
so because of the smaller energy density they are bigger, ah ok. You say "The film replacements are a whole 'nother animal." do you mean in terms of sound? There must be reviews using these caps, can you point me to these reviews?
 
Grainger49 said:
Free,

[...]

Try breaking them in before you install them.  Put them across an amplifier's speaker leads at a normal volume level for a week.  This will put a greater current through them than when used as a coupling cap.

+4/8ohms resistance in series or just the cap you think?
 
Ok this has been a lot harder to put down than I first thought but here some impressions on the JFX film capacitors I fitted to my BHCrack.

BHCrack+Speedball+Valab+JFX film capacitors

Tubes Tung-Sol 5998 & Mullard 12au7

Headphones Beyerdynamic Tesla T1

The instantly most noticeable change to the sound has been clarity and it is really hard to put this into words just how much this has improved it is also a bit mind bending to think it wasn’t so clear before.

A visualization might be looking out over a scene on a grey day and seeing an area that is bathed in a shaft of sunlight which makes everything sharper, colours pop out and shapes are more clearly defined and focused. Everything within the area of sunlight is just more vivid.

The perception of sound stage with the T1’s is not much wider than before but it now has greater depth and a smoother and more seamless feel to it.  With the improved clarity I can look deeper into the soundstage and recording to focus on individual instruments within, this placement depth and resolution is very noticeable on live recordings.


For lack of better words music just flows better, it rises and falls as needed and washes over you with an effortlessness to the dynamics.

This is really hard to describe but its changed how the T1’s connect me with the music there is no more sense of viewing from say three rows back.

It feels much more like 'being there' I can be further back viewing a musical in a theatre listening to say Les Miserables taking in the whole scene or next find myself sitting across the table from Melody Gardot or Diana Krall, who are now singing just for me.  On another track I am right on stage right in the middle of the mix with musicians to the left and right and behind enveloped in sound (this really was a first for me and an amazing “Holy Cow I am on the stage” moment, thank you Florence).
 
This all makes for an increased feel to the atmosphere and venue on live recordings as the music flows out and fills the venues and gives a sense of air as a beautiful solo vocal floats up high into the vaults of a cathedrals ceiling, it’s just beautiful to hear.


Pretty much all instruments sound better, the distortion of an electric guitar, brushes on drums, the little metal cymbals of a tambourine as they vibrate on both sides when shaken these little details keep coming through, plucks on strings the woodiness of instruments the bounce back on kick-drum or a sense of hollowness to an acoustic guitar or the density of the wood castanets are made of. The transparency of those subtle nuances of tones and textures draw you into the music. To many times just one more track turns into one more album way into the small hours of the morning.

The capacitors sonics have definitely improved as they burned in. I had a strange intermittent buzz noise in the lower frequencies on some jazz tracks I couldn’t quiet put my finger on what it was. It was just not right I wondered if my headphones had started to develop a problem with reproduction of the frequency. After about 60hrs this buzz has become more defined and developed into a thrum resonance sound from a plucked double bass string.

The T1’s are a fantastic headphones in many respects but I was very pleased to hear after about 100hrs a welcome hint of soulfulness develop in the midrange and just a little more warmth, body and loveliness to vocals which I think they are the better for.

The T1’s have scaled well with the addition of the film caps and I continue to be amazed by the reproduction of music I listen to and those out of headphone experiences that catch you by surprise have become much more frequent. I have been very pleased with the results of fitting the film caps.

I hope some of this makes a little sense.
 
free said:
Grainger49,
    .  .  .    You say "The film replacements are a whole 'nother animal." do you mean in terms of sound?

Good film caps are much different than electrolytics.  To start with, most electrolytics have a polarity.  Film caps don't.

They are made with very different technologies.  For instance you can get a good 3300uF 180V for ~$8, you can get a nice film 1.0uF 200V (film are usually higher voltages) for $14.50.  That is 1/3300 smaller capacitance.

See, a whole 'nother animal.
 
For the objectivist re-cap burn-in a quick google search brought up this:
http://www.diyaudio.com/forums/parts/81355-capacitor-burn-break.html

You'l have to sign in to get the images.
 
Grainger49 said:
free said:
Grainger49,
    .  .  .    You say "The film replacements are a whole 'nother animal." do you mean in terms of sound?

Good film caps are much different than electrolytics.  To start with, most electrolytics have a polarity.  Film caps don't.

They are made with very different technologies.  For instance you can get a good 3300uF 180V for ~$8, you can get a nice film 1.0uF 200V (film are usually higher voltages) for $14.50.  That is 1/3300 smaller capacitance.

See, a whole 'nother animal.
2673 to be precise, but yeah, didn't thought it would be such a diff. Usually caps have the problem of having a very low energy density. Even the best ones have like 10x less than a battery but they can be recharged very quickly over 500k times.

Just read what JamieMcC posted, interesting. Also read some specs. From what I understand film caps are sensitive and may improve sound. Have yet to hear it myself.
 
Tantalum capacitors generally have more measurable distortion than electrolytics, so they are generally avoided in the signal path.
 
Well I suppose it was inevitable I have had a JFX  2.2uF 250V Polypropylene Film cap that has been sitting in my parts box for a while now (I brought it at the same time as the 100uf films as it only cost £1.72) and ended up soldering it in as film bypass cap across the last electrolytic filter cap in the Crack earlier today.

I feel there has been a slight improvement in fluidity and presence a touch more body to vocals and also the top end has slightly more crispness to the shimmers and tinkles without importantly for me adding any brightness.

It now opens up a can of worms with respect to trying something like a PIO or SIO or further bypassing of the current bypassing cap with a smaller Teflon.
 

I will let the cap burn in for a week or two in situ while I mull over which options to have fun experimenting with next.
 
LL


 
Hi guys!
I am new to this whole cap thing

Would these be an upgrade tomthe stock caps?
http://www.ebay.com/itm/4pcs-NEW-BC-PHILIPS-043-100UF-250V-21x38mm-L-Life-HI-END-AXIAL-CAP-FOR-AUDIO-/171303408745?pt=Vintage_Electronics_R2&hash=item27e27a9469
 
No not really, they are still electrolytic capacitors.  Those bi-polar styles are basically two capacitors end to end inside a single package so they probably sound worse.

I wouldn't bother replacing the stock caps with anything unless they were Polypropylene film, easy to spot as they will be huge!
 
Thanks.

I try finding an "ideal" upgrade cap to the stock. Not easy.
Basically I dont want anything to get worse than stock, then just add more clarity from mids and up.
 
Strikkflypilot said:
Hi guys!
I am new to this whole cap thing

Would these be an upgrade tomthe stock caps?
http://www.ebay.com/itm/4pcs-NEW-BC-PHILIPS-043-100UF-250V-21x38mm-L-Life-HI-END-AXIAL-CAP-FOR-AUDIO-/171303408745?pt=Vintage_Electronics_R2&hash=item27e27a9469

Which cap are you going to replace?  Recommendations vary depending on which.
 
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