Bypass Cap Recommendation

0 Members and 1 Guest are viewing this topic. Read 1189 times.

mlundy57

Re: Bypass Cap Recommendation
« Reply #20 on: 6 Dec 2019, 03:48 pm »
With the Miflex caps, even the small values used for by-pass caps are huge in comparison to others. It’s the 600Vdc rating. IIRC, Sonicaps and Sonicap Platinums are 100Vdc. That extra capacity really bulks them up.

Stimpy

  • Full Member
  • Posts: 1080
Re: Bypass Cap Recommendation
« Reply #21 on: 6 Dec 2019, 04:05 pm »
BTW, complex crossover. What loudspeakers are they?

My Acoustic Research AR-90's.  Four series caps and 4 parallel shunts.  I used a mix of Mundorf's, with EVO Oils for the main series values.  I added Mundorf Supremes or Supreme Silver/Oils, where I needed to build up values.  Some Auricaps in there too.  Parallel caps are Axon True Caps, with film and foil bypass caps.

maty

  • Full Member
  • Posts: 1241
    • Nauscopio Scipiorum
Re: Bypass Cap Recommendation
« Reply #22 on: 6 Dec 2019, 04:07 pm »
With the Miflex caps, even the small values used for by-pass caps are huge in comparison to others. It’s the 600Vdc rating. IIRC, Sonicaps and Sonicap Platinums are 100Vdc. That extra capacity really bulks them up.

[IMG, link] http://maty.galeon.com/WP-imagenes/kef-q100/KEF-Q100-crossover-MiFlex-bypass-2.jpg

[IMG, link] http://maty.galeon.com/WP-imagenes/kef-q100/KEF-Q100-crossover-MiFlex-bypass.jpg


Stimpy

  • Full Member
  • Posts: 1080
Re: Bypass Cap Recommendation
« Reply #24 on: 6 Dec 2019, 04:27 pm »
You are here too:

http://www.classicspeakerpages.net/IP.Board/index.php?/topic/9293-ar-9-ar-90-crossover-re-capping-adventure/

Older thread with big pictures.

http://www.classicspeakerpages.net/IP.Board/index.php?/topic/4174-what-type-of-capacitors-should-i-put-in-my-ar-90s/&do=findComment&comment=72371

[IMG, link] http://www.classicspeakerpages.net/IP.Board/uploads/monthly_01_2008/post-101175-1200489092.jpg

Clean walls... No Rez or similar inside?

Yup, I get around...!   :D

I started my AR-90 refurb, some time back.  But, some health issues slowed me down.  Then, when I went to continue my refinish of the 90's, I found a pair of AR58S speakers, and after a recap, I've been enjoying them instead.  Though, this reminds me, that I really need to get back to the 90's.   :bawl:

maty

  • Full Member
  • Posts: 1241
    • Nauscopio Scipiorum
Re: Bypass Cap Recommendation
« Reply #25 on: 6 Dec 2019, 04:39 pm »
The walls seem... aglomerate. Old speakers  :D

Before changing more components, such as resistors, it would be better to add a sandwich with viscoelastic material like No Rez, I think.

https://audiokarma.org/forums/index.php?threads/acoustic-research-ar90-recap-basic-xover-questions.711857/

[Crossover, IMG link] http://www.classicspeakerpages.net/IP.Board/uploads/monthly_01_2008/post-101175-1200137398.gif

Stimpy

  • Full Member
  • Posts: 1080
Re: Bypass Cap Recommendation
« Reply #26 on: 6 Dec 2019, 05:45 pm »
The walls seem... aglomerate. Old speakers  :D

Before changing more components, such as resistors, it would be better to add a sandwich with viscoelastic material like No Rez, I think.


AR90's



Yes, I've already added extra bracing, and damping to the cabinet walls.  Also, added Dynamat to all the woofer baskets.  Mills resistors in place too.

maty

  • Full Member
  • Posts: 1241
    • Nauscopio Scipiorum
Re: Bypass Cap Recommendation
« Reply #27 on: 6 Dec 2019, 05:57 pm »
Now that nobody reads us, did you notice improvement by adding cushioning to the furniture? And with Mills resistors? You probably did it all at once.

Dynamat is very expensive!

Now, in you loudspeakers this vinyl rip would sound great. In glorious mono, LIVE.

Thelonious Monk Quartet - Mønk (2018), Vinyl, mono, Gearbox Records, US

https://www.discogs.com/Thelonious-Monk-M%C3%B8nk/release/12576350
https://www.diyaudio.com/forums/music/6958-playing-listening-post5999443.html

- End off topic -

Stimpy

  • Full Member
  • Posts: 1080
Re: Bypass Cap Recommendation
« Reply #28 on: 6 Dec 2019, 06:35 pm »
Now that nobody reads us, did you notice improvement by adding cushioning to the furniture? And with Mills resistors? You probably did it all at once.

Dynamat is very expensive!

Now, in you loudspeakers this vinyl rip would sound great. In glorious mono, LIVE.

Thelonious Monk Quartet - Mønk (2018), Vinyl, mono, Gearbox Records, US

https://www.discogs.com/Thelonious-Monk-M%C3%B8nk/release/12576350
https://www.diyaudio.com/forums/music/6958-playing-listening-post5999443.html

- End off topic -

I haven't been able to do any serious before and after comparisons, due to the length of the restore.  But, I did do a recap A/B comparison, between a stock speaker, and the recapped high range drivers, of the other.  The post recap improvements were very pronounced.  Much cleaner and clearer.  No haze over the sound.  No opaqueness.  Very palpable.  Less noise too, as the old caps were sounding very distorted.

And thanks for the link.  Acoustic music always does well on a pair of AR's.  That'll make for a fun listening session.

corndog71

  • Full Member
  • Posts: 966
  • Some people call me Rob.
Re: Bypass Cap Recommendation
« Reply #29 on: 7 Dec 2019, 02:38 am »
You are absolutely correct about the ClarityCaps.  Nice, but very colored, in some respects.  And that upper end roll-off, drove me crazy.  I was hoping it would improve with burn in, which it did to some degree.  But, I had to add bypass caps, to open them up a bit more, and the sound was still slightly muted in the highs.  While I like their sound, the Clarity's still aren't quite to my liking.  I might try a mix of ClarityCaps and Mundorf's, to see if I can get a better blend.

Clarity CMR are pricy but much better than the CSA/ESA series.  Otherwise I would recommend Sonicap gen 1 with copper or Teflon bypass.