Dueland CAST PIO


Hello I had a few questions regarding this cap and was wondering if any owners who have heard this cap first hand can help me out.

I am thinking about adding this as a CAP upgrade on the speakers I am trying to get. I have heard from owners on forums saying it made a significant difference to their speakers for the better, but when I contacted some other speaker manufacturers they tell me that just because you add the Dueland CAP does not necessarilly mean you will get better sound. They say withs ome speakers they might sound great, but with some other speakers, they might even make the sound quality lower.

My questions are.

1. Will the Dueland CAST PIO cap upgrade change the signature sound of the speaker as intended by the designer?
Or will it simply make everything sound a bit better not effecting the original sound?

2. How much did the Dueland CAST PIO improve your system?

thanks.
ssos101
I totally disagree.i have been modding Loudspeakers as well as electronics 
for 15 years. I just replaced the Mundorf  Supreme ,and silver oil with VCap OIMP
caps very nicely balanced but need a solid 100 hours to start opening up.
up to 400 hours to fully runin .the midrange now is much more liquid
the a Mundorf  Silver oil are nice but lacking in Bass and not as deep in soundstage depth vs the VH OIMP caps.
I would rate these a 11+ 
now if using a VAh CU teflon bypass then is as good or better then Jupiter Copper, or Audyn true Copper. The Mundorf cast are a 15+ Top of the hill hands down . But 4-5 times the cost for 3% or less .if you have money to  spend then do it. personally A The  Jantzen Copper inductors are excellent and as good as  most any. For Resistors the Path Audio are The best out there for Loudspeakers 
yes betterthen Duelunds cast  . I have done several speakers and under 1% total distortion  and are constant under all demanding conditions. One more thing with VH their matching of all capacitors to under 1% combined with these resistors 
precision at its highest No other company has tested this close for a  Loudspeaker system. For  most Audiophiles my recommendations would be 
considered  Excellent ,but as a Audiophille You can buy pure Silver duelund caps 
and spend $20,000. It is only money Right !!
Duelund resistors are weird. They have some sort of thermal coefficient built in they call a good thing, but it only works if the speakers heat up to match.

Audyn TC caps are outstanding bypass.  Right now 0.10uF at PE are running $16. Pretty good deal for performance.

@audioman58 Have you tried Mills resistors?

Best,

Erik
I was asked if I have used Mills resistors .Yes many times in the past . Please keep this in mind the higher the order crossover the more critical it is magnified. For example if you have a 5% resistor 
it can vary up to  Ten if you have other parts 5% or more a speakers Channel can vary by more then a 1/2-1 db which is clearly audible. I had found VH audio  OIMP cap with a V CU bypass and option to match all caps to within 1% or less to complement the Very accurate Path Audio resistors which are smooth and Very detailed and total distortion under 1% on average . In my Salk Bud Fried Transmission towers. It is incredibly accurate as well as a deep liquid midrange and detail across the board. My new favorite caps with bypass for roughly the same as 
Mundorf silveroil and personally like better then even their SGO caps.  Well worth tchecking out.and these and Path resistors take 
3-400 hours to Fully runin . 
And... this conversation just took a turn to a world I'm going to stay out of.

To be honest the midrange would be the most beneficial for your money  for almost 70%
Of the music is there. the cast are very expensive , the smaller the value 
The better for your wallet. The  VH oil caps with  a smaller value VH CU bypass caps are a outstanding combination  and not far behind ,for tweeter excellent 
If cast is on midrange. for Bass Munforf Supreme plenty good lower frequencies 
Not as critical . inductors Jantzen Of Denmark great inductors and value.
If you can get your capacitors matched to within 1% for each respective category 
Tweeter,mids you will hear the precidion especially if you use the Worlds best 
PATH audio resistors. under 1% typical a slightly warmer character rock steady 
Even under the most demanding music I have tried them all Duelund cast, mills 
CAdcock.  $30 each is not cheap , but last week parts connecxion had a  25% off Sale . these too like the capacitors take roughly 400 hours to fully settle in.
I just play them steady gor a few weeks ,and shut off 2x a day for 30minutes to Let the  caps discharge ,to help cycle in the cap breakin. I have been doing mods 
For almost 20 years the caps and  xover items has advanced a lot over 20 years 
In winding and methods. Duelund is old school but a lot of hand craftsmanship.
A great sounding  hockey puck ,or bigger 😎 !!