I've the 'Alex's in my 'mig amps' for a couple of weeks now. Probably about
50hrs total. These r the best 'oil caps' I've heard, Mundorf SGO being the others, in my amps. Up to about 20hrs. a 'wee bit' of stridency on some leading edge female vocals that has now disappeared. Compared to the Aeons, they sound is much more visceral & tonally correct. They have more body & 'flesh on
bone', & the family resemblance w/the more expensive Duelands is apparent. They've opened up & become more spatially distinct & both lows & highs seem
clear, tight, & extended. The presentation is more, 'out of the box', and the Daedalus disappear more as the source of the music, the soundstage is also
deeper. Perhaps this contributes to the 'greater body' sensation. Detail is improved across the frequency spectrum & dynamics seem very good, w/tracks
such as Warren Haynes, River's Gonna Rise, pounding out its drum intro. In the 'Migs' they seem organic, natural, earthy & rooted. A bit 'softer' in presentation, but more 'lit from within', at least that's how the 'oils' seem in the 'Migs'.
All said, i'm still at a bit of an impasse looking for degrees of
'more optimization'. I'm wondering if using the Clarity MRs in my pre & 'Alex's
in the amps is the optimal use of such. I don't have experience in 'what should
be where' placement. Am I getting the best of both or half/assed of each?
Any suggestions/experiences? If the MRs aren't as 'transparent' in the pre, yet
bring nice air & extensions high & low is that bringing anything that the more
well toned 'Alex's would in the pre? The Clarity seem a terrific cap for the money, but I want to 'eek out' as much performance via the pre as I can & anything lost in the pre, can't be reclaimed by the amps. Is there any 'consensus' as too using the MRs in say speakers, & the more 'exotics' in electronics, as to being optimal? Am I correct in 'assuming' that going to
'exotic' caps in the pre will pay dividends heard downstream. Matching up
Alex's, or mixing the more upscale Duelands or even the copper Vcaps? |
Grannyring
I have no experience with Duelund Alexander but can say the VSF and CAST have never gone south. The started good and got only better.
That being said I am not sure of the relationship of the two as VSF and CAST are hand made and Alexander machine? |
Micheal
I agree on the Klipsch Lascala or Khorns can be just amazing but also agree with someone who would say they were awful, as they can be with wrong upstream components.
A friend of mine who came over to hear them after we were out listening to new (up to) $100k systems was shocked! I asked what he thought of the stereo and he just had a puzzled look of it does not even sound like a stereo?
I was getting e-mails from him at 4am for days after as he was looking for the same stuff. He drove 9 hours each way to the U.S. To buy the speakers and another 6 hours in another direction to buy the amp which I told him was nothing special.
He has had done a whole room around them for Audio and Video, but is having a tough time with the concept of more money in parts for a crossover than the speakers cost and that certain drivers are better.
That is what I have been doing is getting ready to finish the whole basement but for Audio first not concerned about video. |
Hi VolleyGuy a good friend of mine , who have the exact same speakers like yours , the V-cap Cuft has burned for about 400+ hours in his pre-amp and the total result is just amazing.
We have almost the same amps and after the long time on the V-cap i now know what kind of magic you are writing about when speaking about the La Scala. It's just amazing though he only have replaced the tweater caps with Clarity MR instead of the very very pricey Duelund.
He always have some issues now he's just a very happy person. |
Ok, I hope you folks can tell me if what I am going through is normal with these new Duelund Alexander caps. I purchased a new set of 3.3 uf Alexanders for use as coupling caps in my tube preamp. After about 24 hours they sounded darn good to me. They got better up until 120 hours or so, but now the sound has gone south - BIGTIME!
The bass has left my music and the highs are a little hard and bright after the 120 hour mark. So much so that both my wife and I turned off the stereo as we were so disappointed with the sound.
I guess I did not expect the sound to go south after 120 hours, but rather continue to improve. Has anyone else experienced the same thing with this cap? I hope it gets better as they cost me $400 and right now the Ampohm PIO tin foils are better sounding.
Is there hope..... |
Michael
I am still clocking on the hours on the VCap Cuft. They are a serious capacitor for sure and getting better all the time. I have not had a chance to install the rest of the Silver wire for direct comparison but already know the Cuft are full of details, details, details. |
Have tried the Jensen Copper Alu Case in a similar RIAA as I have and even after 75 hours the result was the same.
Dull Dull and more Dull. This is a quality PIO and i am so disappointed. I know my ref is V-Cap CuFT but i have expected more from this cap. Properly i am not a PIO person , I don't know but this is not my cap. |
I have used oppo nearly 10 years. Of course not the same one, I have had about 3 players up to the current one as they progressed into blu ray. Great player, great sound, great value. I use with an external DAC, was not all that enthused about modded units, great transport, with a good DAC and I then modded the DAC and was set.
Reason because this DAC can handle any source, not just a spinning disc and it can be modded far further than a player so I keep it separate and flexible as digital has dropped off a cliff in the past 5 years and you can do just as well for 500 now as 5000 10 years ago when I replaced my Wadia with such units. |
Since my CD player bit the dust. Laser not working.
I have wanted high res digital for some time. I am looking at an Oppo and thinking of having it done by Modwright. I have already contacted Dan to see if a Duelund cap will fit.
Any comments on mod'ed digital players? or Oppo in general? |
Undertow:
I got a good price courtesy of David Garretson on a custom set of 16 x 25uF ClarityCap MR caps that are being made now at the factory. I priced-out the Duelund VSF and CAST versions, and found them to be staggeringly more expensive than the MRs. Also, Tannoy chose MRs for its new flagship Kingdom Royal loudspeakers, so I see the experiment as a good bet to sound good. The crossovers will be external in large, double-decker, ebonized, oak bread boxes insie which there will be plenty of room for all the large caps and coils. And I'm using MRs throughout and, yes, they are large. |
3000 dollar is pretty ambitious indeed!
In front of the Apogee Scintilla's midrange is a 240 uF cap. Apogee already used multi parallel caps in the mid 80's as they constructed this cap out of 24 x 10 uF polypropylene Sprague caps. The Spragues are nothing special, still the Scintilla's midrange (a 1,5 m tall 2 inch wide pure aluminium foil) is considered by many professional reviewers as one of the best they've ever heard. No doubt the good sound quality is not the result of the Sprague caps, but of the Scintilla's design (ultra-light ribbon, a special magnet array which houses both midrange and tweeters etc.). However, I would not be surprised when it turns out that the relatively cheap Spragues in front of the midribbon don't seem to affect the sound in a disappointing way as the cap is a large multi parallel cap. Maybe when Apogee's had used larger value Spragues (when available), the midrange might have lost some of its quality.
I btw will replace the Spragues by 21 x 10 uF Gold Obbligato's (size: 30x75 mm), the remaining 30 uF will be smaller value Gold Obbligato's.
In my situation size doesn't matter as I've decided to build an external xover which has several advantages (in my situation) as well.
The 10 uF Obbligato's retailprice is 25 dollar and when you order something like 50 pieces, diyhifisupply in Hong Kong will offer a discount of 50 percent. In my case all caps costed me around 700 dollar.
Of course I would have loved to have the Spragues replaced by pure copperfoil PIO caps but for the extra price so many other upgrades in my system could be made. My hope however is that one day the Chinese (Obbligato?) will decide to manufacture pure metal foil PIO's as well... |
Jburidan
I have to say thatÂ’s a pretty ambitious experiment, so you will need 16 total Clarity MR's at 25 uF? Wow, thatÂ’s gonna run in the 3000.00 U.S. range, and if you have not seen the size of these your in for one large cabinet to house them! Probably something close to the size of a 18" tall bookshelf speaker size just to fit that many clarity MR's at 25 uF x 8 per speaker and I don't know if you could even jam in the rest of your needed crossover components without a lot more space then that.
I accidentally received some Clarity MR in the 10 uf size once and they were about the size of a small jar of jelly , so I can't imagine how much larger the 25 uF might be. Just as a warning. You might want to see what Duelund offers, maybe you could get 2, 100 uF caps to parallel for the same price, one pair each speaker and save some space, might cost a little more though. |
It sounds better, not louder IME.
The multi parallel cap reveals more detail than the single cap, however without becoming a "detailed" cap like for instance some of the very high cost polypropylene's or the TFT V-Cap. Its sound can in particular be characterized as more natural.
This might be the result of the multi-parallel cap having a more benign resonance character, is less noisy. But if so I don't know which factor is responsible for this: other resonance frequency spectrum, smaller amplitude resonance, even lower resistance/inductance and/or something else...
The bad results with different caps used in a multi parallel cap might indicate that the resonance frequency as a result of the 1) tightness of the winding (probably a relative constant value for a line of caps produced by a manufacturer, so more or less equal with small and bigger caps of that line) and/or 2) the type of the foil is big.
I've read about low value caps having another time behaviour than high value caps and something about different memory-effect. This would result in bad sound when small and big values are combined in a multiple parallel cap. Maybe, but I haven't experienced it. No doubt there will be a (slightly) different time behaviour, but maybe the advantages of the multiple cap are big enough to compensate for this. And of course in order to prevent this one can build the multiple parallel cap up with caps of one single value, like you for instance will do with the 8 x 25 uF.
Frederik of Duelund put some attention to the multi parallel cap having more soldering joints than a single cap. I don't believe this has anything to do with it. First it is a parallel cap and not a series cap, further I know how bad soldering joints in a speaker xover sound like and it is far from natural/detailed. As I wrote earlier I once noticed a xover built by a professional manufacturer with multiple parallel VSF Duelunds. No doubt the effects I've noticed with the Obbligato's will be relevant for the Duelunds as well. Though the Duelunds will have a high dampened character by nature, reducing the resonance even further by multiple parallel caps might be rewarding with Duelunds as well.
|
I'm going to use 8 x 25uF ClarityCap MR caps in lieu of one 200uF Solen cap in the band-pass filter of my Tannoy 215 DMT ii crossover. I understand that this will result in lower ESR which will be audible as loudness.
Are you stating that many caps in parallel sound better? Or just louder due to lower ESR? |
For my Infinity RSIIb speakers I needed 2uF and 3uF caps for the low-tweeter and high-tweeter, so I paralleled (2) and (3) 1.0uF Mundorf Supremes. It sounds excellent. |
Hi Dgarretson,
A few pages back I wrote about a sort of bypass-experiment in the tweeter section of the magnetostatic Apogee Scintilla with its two, highly revealing 1,5 m tall and 0,5 inch wide, pure aluminium foil tweeters.
http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1211428524&openflup&1366&4#1366
My experiment differs a bit from the more common "single, small-value bypass cap"-experiment (that most of the time uses different caps for the bypass and main cap), as I experimented with multi-parallel caps of the same type/manufacturer. I experienced that this configuration made a very (!) significant improvement over the single value cap (same type/manufacturer as the ones used in the multi-parallel cap). Further I noticed that multi-parallel caps using different kind of caps lead to bad results.
It is a pity that I haven't read so far on this forum of someone else doing this same experiment, as the improvement is not small and the costs are very low. In my earlier post I mentioned that I would not be surprised (based on my experiences and Tony Gee's captest) when the Obbligato cap performs in about the same level as the best Mundorfs when used in multi-parallel configuration. |
The wait is over.. 400+ hours on V-Cap CuFT in my pre-amp and they are amazing. There is absolute nothing "cold" in them , and the music , timing has really chocked me.
I hear things in recording which for 3 month ago wasn't there.
So to all who want to take their hifi experience to another level consider them as your best friend. |
Thanks Volleyguy for sharing your thoughts with me. I have decided to order the Dueland Alexander and give them a try. I realize that they won't compete with the VSF or CAST, but hopefully they will share some resemblence of the Duelund family traits.
All the best, |
No regrets
I would not assume right off for the Jensen to be better? I think Jensen priced the Paper Tube to give reasonable value to the VSF or expensive CAST. |
Regismc
I think you are going to be shocked at what caps mean. To me it is the sound of a system. |
Sherod
Yes I am not saying anything conclusive about VCap's as they have almost legendary break-in time |
Another way to embellish HF is to bypass the tweeter cap. I'd be interested to hear others' experiences on this point. |
Volleyguy, I suppose that once the treble has been purged of artificial resonance excitements and is more clearly delineated, one is in a better position to experience the subtleties of what a good supertweeter can do on top. Moreover there are a few designers and reviewers who believe that a supertweeter projects overtones downward in FR. Thus there is the potential to unveil a more extensive improvement across FR, while also embellishing HF to redress the sensation of slight treble attenuation that one may perceive in a low-resonance crossover. As I have not yet tried this I am guessing, of course. |
That should read 'migs', as in Mig fighter jet tubes, not 'mugs'. I should
also mention I run a pr. of JBL pro 'slot' supertweeters, not the 'bullets.
These r run on lpads w/solid silver wire from the spkr. terminals & sit atop
the Daedalus. A really nice addition if you can find them. |
Would anyone be able to tell me how they feel the Jensen Pure Copper Foil pio in Paper tube sounds in comparison to the Duelund Alexander copper foil pio?
If I understand this correctly, they are both made at the same location, sharing resources for R&D, design, manufacture, sales & promotion, etc. I am not implying that they are the same tube however.
With the Jensen Copper foil in paper tube costing much more than the Duelund Alexander, would one presume it to be on a higher level than the Alexander?
Also, does anyone know what the max operating temp is for both of these capacitors?
I need to buy a couple of .22's for use in my single ended 845 amplifier and it runs hot.
Thank you for your help |
Dgarretson
Interesting you ask about the super tweeter and yes considered it for sure. I seem to remember a high end super tweeter on the Duelund site? I remember mentioning this in the past wondering if they felt they needed one? |
"I'll add that listening to a low-resonance capacitor-- or a low-resonance wire, assuming that this is the purpose of the oiled silk jackets on the Duelund wire-- can take some getting used to. Once the microphonic "excitement" is gone, one needs to evaluate whether musical information has gone missing as well."
Write it in stone. The same is true for cables. That was a big surprise for
me, totally unexpected. I tried a single 'liquid" power cord in my rig, feeding a conditioner & it just sounded 'right'. A bit quieter, more layering
of vocals (it was holiday music), just more real. Each one, power &
Interconnect added to the effect, simply more real. Never 'spectacular'
effects, but quieter so that instruments are more distinct & identifiable.
For a few weeks as this was completed I did have a question as if I had
'rolled the treble', it was so quiet. But, no way! All the music is there in
a way that is totally non fatiguing & so well balanced top to btm. Good
recordings are fully fleshed out in a most enjoyable & satisfying way w/detail & air, but never harsh. I'm looking for a bit more 'focus' by rolling
caps. Though it may be my speakers or isolation equip. under the migs,
I figure that the Aeon caps, though musical, may be 'upgradable'.
Anyways I find it iintersting that caps have a similar 'fingerprint', & look
forward to getting the 'alex's into the mugs. |
Further to the ClarityCap resonance study, I'll add that listening to a low-resonance capacitor-- or a low-resonance wire, assuming that this is the purpose of the oiled silk jackets on the Duelund wire-- can take some getting used to. Once the microphonic "excitement" is gone, one needs to evaluate whether musical information has gone missing as well. IMO excessive soft damping in some types of PIO caps can have both effects, in addition to causing shelving effects throughout FR.
Audio has alternatives to deal with mechanical resonance(e.g. soft vs. hard damping, coupling vs. isolation). Each approach may have its place. Moreover, damping properties of materials vary independent of dielectric properties. Teflon, for example, which has excellent dielectric properties, is relatively soft, which may be a good or bad thing with respect to resonance control? FWIW, I can report that at least several leading OEM designers don't like the "sound" of teflon as compared to polypropylene. But what properties of the construction are they really hearing? There are multiple variables in operation.
It's good that the inclusion of V-Cap in the discussion seems to have moved the thread beyond the paper vs. plastic discussion.
Dave
ClarityCap OEM Sales |
Volleyguy, in the key areas of performance the Duelund wire does much better than the old Cardas stranded copper, and maybe will continue to open up through extended break-in. It's interesting that in the course of PMing an audio friend who had also installed the Duelund wire in speakers, we both confessed to thinking of adding a super tweeter. Subliminally we were both looking for more on top. Are you? |
Volleyguy,
20-30 hours on the Vcaps is nothing. I haven't tried the new copper version, but the teflon Vcap took over 400 hours to open up, and that was in an electronics component( preamp outputs) |
Dgarretson
Which do you think is more correct?
When I heard the CAST vs. VSF I knew the VSF was adding noise but I was Ok with it, or at least some combination of VSF and CAST.
I do want to hear CAST in electronics sometime.
The VCap Cuft is interesting and not thrown in the trash bin so to speak as I have with so many other kinds..... at least not yet. They are at least neutral I can not hear any tilt like Mundorf Silver in Oil, Ampohm or vintage. Only 20-30 hours so far likely. Just not sure if they are natural? |
Dgarretson
I was worried you were undecided on the Duelund wire. I do agree with you. I think the flat solid wire covers all freq's MUCH better and stranded as stranded seems to favour the high's giving more air.
I found when rewiring my speaker the drivers work much better in unison. With the stranded there was target freq for each driver.
Is there a price? Maybe. Have you went back and tried your old wire?
I also find the plastic coating causes an echo which I can not see any good from that.
I think it comes back to the Clarity White paper saying 70% favoured low resonant caps in a blind test. The other side was still 30% favoured high resonant caps. I think we like the air? Tony Gee liked the Ampohms and they sound just like vintage to me, quite high resonance. (I can't tell them apart) |
Volleyguy, be interesting to have your viewpoint on a stereo pair with the Duelund silver wire. After a few hundred hours I'm still undecided about this wire. The presentation has lots of satisfying weight and embodiment, but may be a tad over-damped and leaden. Does lots of things well, but maybe not everything. |
Other side of Duelund Silver Wire is in. In the next few weeks I will be able to test the VCap Cuft with exact same signals. |
Micheal
Duelund sound great out of the box. They do get somewhat better but never sound bad. They are an easy break in. The CAST are a little tight though at first. |
Could someone please recommend a cap (or a combo) for the Audiotechnolodgy middriver in a crossover? I plan to use the Duelund copper VSF for the RAAL tweeter. AT is a little bit on a warm side warm and Duelunds for them are too expensive for me. |
Volleyguy , yes indeed this is a awful long time.
My friends pre-amp should be about 330-350 hours by now. Hopefully next weekend we'll be able to check at 400 hours.
My pre-amp is now at 220 hours , the 250+ hours set i was
listening at was not mine..
The best thing is that still at 200+ hours it still is getting better..
What was the break-in time for your Duelunds ?? |
Oh Micheal 250 hours. That is so long! |
Hi Regismc
Glad you tried the Alexander from Duelund , we're missing a review upon these caps. I and a couple of friends did a listening session with the guy who had build my amps. He was in total chock over what a different a 250+ hours V-CAP CuFT does to his amps.
Currently he 'is using Mundorf s/g/o but he will immediately swift to Jensen PIO types. V-CAP he think would make his amps to pricey.
And my lesson is , NEVER JUDGE a CAP before the ending of the break-in time , NEVER. |
So, order in 4 the Dueland 'Alex's, .22 for my Mig monos. They will replace a pr.
of Aeon coupling caps. I'm a bit 'nervous' as I've yet to see any detailed
description on these as everyone seems to focus on the upper models. As
noted, oil in tube amps, may portend reliability issues vs teflon or 'poly'. I can
always swap out for the MRs if I end up w/too much added 'color', or pay up for
the likes of cutf vcaps. My only prior experience w/'oils' is a pr. of Mundorf s/o/g in a pre that long gone. So its MR's in the pre, & 'Alex's in the amps for a
spin. I've replaced all the small signal 12at7 tubes in the migs, which were originally mullards w/psvanes as that was a bit too much 'rounded' or old fashioned of a tube signature, did I just put myself back in the same boat?
I like textures & tonal colors w/layering & spaciousness. All of my power
cords & interconnect/spkr wire are Audio Magic clairvoyant liquids, made of
polymers, the most natural sounding cables I've heard. They don't carry rf,
r dead quiet, & super natural sounding. More than the various copper, silver, & golds I've tried. Many of the discussions here on capacitors, could be at
least partially transcribed onto my experience w/cables w/the liquid polymers
being the best, most natural & tonally correct. The 'metals' bring a coloration,
a signature of sorts w/various 'emphasis'. Jerry of Audio Magic says they 'ring' as a way to describe the difference. Anyways, I'm in for the experience
& having some fun, as always in audio & life, the education continues....
|
Undertow,
Not to comment on other manufacturers, rest assured the Jensen of today are orders of magnitude better than Jensen of old with regards to reliability. |
By the way as a side note, I am not sure the verdict on (Oil Capacitors) in electronics reliability these days? I know when the Jensens came out 15 years ago and started this whole DIY high end capacitor landslide that some say they did not always survive the test of time without leaking?
I assume the Duelund Oils / Alexandria's are better today, and I am sure better sounding, however I had Jensen oils "Stock" in Balanced Audio Technology amp, and they used these in Tube and Solid state gear. I replaced them with the newer Jupiter HT's a couple years ago, and they are much better... No oil, and they are better than the Mundorf Oils as well.
I am not totally sold on the Oil in electronics, I do like them in Speakers and they will last there due to low heat and voltage. I also owned a CARY Tube mono pair with Jensen oil's, was not blown away, as a matter of fact I found the reliability and sound better from even something like the Jantzen superior Z caps.
So for me I think the MR's or the Jupiter HT's are the best for the MONEY. Duelund Alexandria's are a little more than both it looks like so if you want oil, I don't know myself how oil sounds in comparison to an original Duelund VSF style as this is a very different product for them, but I do know all other oil caps do not compare to a VSF or Clarity MR' so that's just my 2 cents. |
Thanx fellas. All caps r .22's, both pre & monos. A pr. In each
mono & a pr. of .22 MRs already installed in the pre. Each mono
has 2 6C33C bottles w/4 12at7s, about 50wpc. The V-cap coppers
'sound' attractive, as I've a friend w/the 'non coppers' in a pr. of monos
which always sound really good, but, I gotta choose btw. the MRs or
the Dueland 'Alex's @this time. Sale prices thru July @PartsConnection. I've heard the other Duelands @RMAF as I live in CO. & they are always amongst the best sounding rooms, (@least in speakers), & the MRs r
doing a lot of things right. Decisions, decisions... |
Regismc,
Never heard the Duelund Alexandria's. I have heard the Duelund VSF, and the Clarity MR. Both are great, both can't go wrong. And the only comment on Mixing was directed toward trying to combine another type of cap either bypassing a duelund or in a circuit like a crossover using more than one type or several positions of capacitors, then your better off with all Duelund 100% or all Clarity MR 100%, not a mix of the 2.
As for your amps I am sure both are great, but Clarity MR's I have used in an all Tube preamp with stellar results, and I have used a Duelund VSF in a tube PHONO amp with also zero compromise results.
The VSF may be slightly more natural, the Clarity MR might have a little more detail which doubles as "Airy". Depends on the tubes, if they are very soft or warm it might be a nice contrast using the Clarity MR's as you have already had first hand experience. Also Size consideration physically comes very important in play. If a Duelund or Clarity MR' depending on the Value you need is just too big to fit.
If one of these caps has a smaller body for the comparable value (Alexandria vs. MR) than you might be better off with the physically smaller cap depending on the space you have available as both are winners. The VSF is a bigger flat body almost guaranteed to take more space and may not fit at all, then again depending on the setup might fit better with a big flat cap opposed to a big round body cap. |
HI Regismc , I am listening to a pair of 6c33 mono's right now. The have the V-CAP CUFT 0.022 uF in each and they are playing fantastic. Be Aware they need a lot of break-in time these monos has been playing with the caps for 168 hours right now. V-CAP has no problem with mixing with other caps, i have the Clarity MR in my tannoy speakers.
If you won't go for Duelund , V-Cap because they are costly , try the Jensen Copper , Then are really good and does not cost a fortune. Which Values do you need ??? |
Looking for some advice. Run a full tube rig w/6c33 monos, tube pre,
modwright transporter, audio magic liquid cables, hot rodded da-1s.
Rolled the clarity mr caps into the pre, very nice upgrade, lots of air, great
extension & spaciousness. I am considering either the MR or the dueland
Alexandria for the tube monos. Someone mentioned that duelands don't
mix well with other caps so I am hesitant...... any experience/suggestions?
Thanx. |
Hi Frederik,
The caps were returned after the test to "De Audiofabriek". This company unfortunately no longer exists anymore so I don't know what has become of the two caps involved.
The tests were done in between the fall of 2007 and the spring of 2008. The caps were very likely manufactured by Duelund somewhere close to the summer of 2007. I must have contacted you for the first time somewhere close to the spring of that year. In these days only the 200 V cast copperfoil caps were available. When I contacted you, you told me that you were working on a 630 V version. From that moment it took a few months before the first 630 V cast caps were finished.
The cast caps that were manufactured for me were 2 x 2,0 uF copperfoils. They were put into the typical circular paper casing and measured in my memory something like 10 cm diameter and 5 cm height. They were huge and very heavy.
Kees |
Hi Kees,
I would need to have the caps here, to answer that question. |
Hi Face,
A few posts earlier I wrote:
"The system in which the Cast Duelunds, tinfoil V-caps, Jensen Alu tube and Jensen paper tube were tested consists of a heavy modified CEC transport coupled to the Audiomagic DAC (same league as the AN 5.1 Signature) and a very fine all tubed preamp and all tubed poweramps, both created by Peter, driving AN speakers (not sure about the model). Though it can't produce very high SPL's, is limitated in the low domain and is way less revealing than my modified Apogee Scintilla's, it is quite a good system (without any plastic cap in the signal path). More important for me was to have the caps tested by a guy I know that is very experienced, has very good ears and puts most interest in tonality (!) in his designs and modifications."
The "tubed" preamp and mono poweramps are designed by Peter van Willenswaard himself. He also designed the Audiomagic DAC. The preamp can't held up with my modified Silvaweld SWC1000 but it is still a very good preamp. The poweramps I find harder to rate. Further the system was connected to a Pure Power powerregenerator. btw: this powerregenerator I can recommend very well, it is much, much better than the PS Audio Premier Plant.
However.... more important IMO than the system and the room in which the test was done, is the fact that this system was able to reveal differences between alu tube and paper tube PIO copperfoil Jensens and the tinfoil VCap very well. And the difference in this system between the Cast Duelund and the alu tube Jensen was relatively small... And with this in mind that tonality is the most important parameter to Peter.
So therefore my question to Frederik: is it possible that the fact that the cast caps that we had on loan, were the first produced, is reponsible for our results or is this not a likely explanation? If not, I still would like to try out the Duelunds in my passive speaker xover one day (that is in front of the tweeter as the cap in front of the mids is 240 uF), but the coupling caps in my poweramp and the DAC will stay Jensen paper tube.
Cheers,
Kees |
Hi Face , is it still posible that you want to send me the diagram over your HPD-385A crossover. http://www.polkaudio.com/forums/showthread.php?t=65991&page=2
Can not find anything serious on the internet to bypass the switches.
Thanks Michael |
