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

Showing 4 responses by audioman58

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 !!
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 . 
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 😎 !!
I have read some posts here and to say the Mundorf supreme beat thd VH audio 
Oimp caps is totally off yhd wall .I have been comparing caps in mods for at least 20 years . Munforf is a good cap . in my system or any that has the vh oimp capacitor after full breakin ,roughly 400 hours the vh cap does everything in s much more natural fleshed out fashion. I have mixed the  oimp cap with the excellent vh CU copper oil bypass caps for less money then a Mundorf silver gold oil caps
And it is s great combination I would say for sure better then  the Mundorf 
Which is a bit forwards sounding Especially the new Evo Supreme SGOIL caps.
Balance wise the oimp is as good or better,I learn towards better then the Munforf Silver oil on its own merits. naturalness is what it does best .I Totally agree with Ryan none better at its price point , mix the oimp cap 75%,then 25% vh-CU  bypass 
Cap,together this combo is my second favorite cap behind the Duelund Cast, for several times less money. anyone that heard this in a  preamp,or Loudspeakers . Excellent it took 
A very good under $5k speaker and transformed it  at least  $10k plus on musicality alone . it had Solen, then Mundorf supreme,the oimp was better across the board ,then put the combination 75,25% a substantial upgrade ,a great setup.
If you have not tried this ,with proper burn in 400 hours ,then you are in no position to make any educated type of statement.Try it you will like it !!