Jump to content

Recommended Posts

I did not like the polypropylene Obbligato oil caps used in rebuilding my AA networks.   After years of my K-horns sitting, I decided to try again, with a pair of Type B which I rewired

as Type A in charged coupled configuration - this was much more to my taste, better detail, less fatigue - ESR on these old caps was fine.  I first heard MBGO years ago in a Baltek90 speaker and was impressed.  They may even be better than KBG (?) - they're less expensive and more compact.  I think I'll get more for my Karlson projects.  Of course subjective synergy 

may occur with different caps for different crossovers/drivers/amps/DAC, etc.  My Heresy I are stock other than KBG caps (not charge coupled) and have beautiful midrange with an an inexpensive singled ended ultra-linear EL34 amplifier.

 

uiwT4DA.jpg

  • Like 1
Link to comment
Share on other sites

btw - my cheap ESR meters says two 1uF 400V MBGO caps in parallel have 0.16 ohm ESR vs 0.5 ohm ESR for a 400 volt KBG cap - so the 1uF MBGO paralleled might be pretty good in standard Klipsch applications such as Heresy I, La Scala, Klipschorn.   I'd like to hear someone with Jupiter caps do a comparison with MBGO.

Link to comment
Share on other sites

Nice.

 

I don't think paralleling for lower ESR is that critical - charge coupling offers a much more positive subjective experience - as you've just found out. 

 

Please point me towards the MBGO capacitors so I can buy some. Thanks!

Link to comment
Share on other sites

you can do like I did and use ~12uF in the 13uF position.   Parallel (20uF + 4uF)  to get 24uF so you'll need two 20uF and 2-4uF per crossover, order enough 4uF to make the required 2uf caps for an A or AA network.  Use a 1 meg resistor between their junctions - apply 9vdc - whatever, then enjoy.  I'll have to parallel 1uF caps to get near 3.3uF for a project.

 

20+4 is the closest and cheapest combination I could find in MBGO caps to get a series-connected 12uF cap

 

20uF http://www.ebay.com/itm/20uF-160V-Paper-Capacitors-MBGO-CCCP-Lot-of-2-/381426751255?hash=item58cece5717:g:ZLEAAOSwN81WELK3

 

4uF http://www.ebay.com/itm/1x-MBGO-2-4uF-160V-Paper-in-Oil-Capacitor-for-Tube-Amps-NOS-Tested-/162164116398?hash=item25c1bc0bae:g:WoEAAOSwMtxXriSI

 

btw, I know a lot of guys think the K400 is a lousy horn (too small a mouth for one thing) and will run something different.  ~25 years ago I used Bruce Edgar's 250Hz tractrix with alnico LE5 as my K-horn midhorn.   With decent caps and lots of putty on my midhorn, I like K400 just fine and can appreciate the K-horn in its original form.

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...