@thieliste No, I have not compared any other power tubes in the amp. I am quite happy with the KT150’s. In order to utilize other power tubes besides KT150’s the amp needs to go through an internal modification to accept those tubes. I have rolled in various driver tubes, as the amp is highly sensitive in that area, At the moment i am using a mix of RCA Clear tops and NOS Tungsol’s in those locations.
I do know that a friend of mine believes that in his amp, the KT120’s sound better than the KT150’s, but this is a different circuit and I think the Mk2 Jadis amps are designed for the KT150’s.
|
@daveyf Thanks for your input, yes the JA80Mk2 seems the sweet spot in the Jadis line up.
A very good Jadis dealer in Paris who used to be a Thiel dealer told me the JA80Mk2 would be up to the task.
Have you compared KT88 to KT150 in your JA30Mk2 ?
|
@thieliste IME, the best sounding Jadis for your system is the one that will still drive your speakers and is the lowest powered model you can get away with. This is why i went with the JA 30Mk2's. Like most amps, it seems that the higher powered models sound less impressive than the lower powered models, assuming of course that one can drive their speakers correctly. If your Thiels need more power, I would think the JA80Mk2 would be a good match up.
|
I’m trying to figure out which of JA80 Mk2, JA120 or the new JA170 would be the best match for my Thiel CS 3.7s paired with Jadis JPS2 linestage.
I miss too much tube sound even though I have tried many very high end SS integrated.
I will soon try to demo the Jadis DA88S with KT88 in my system just to have an idea of the Jadis sound on my Thiels.
If you Jadis specialists have any idea please share.
|
Ok, now back to the regular scheduled programming...... |
Here's the same Miles Davis track as the JA30, Rememer my WBer has highs ens in mids, so bass will be lowered SPL.But 1 to 1, the JA30 will have more kick in bass, although the Defy with Mundorf caps offers all the bass i need for a 10x12x8.5 room. The Mundorr caps brings in more bass. These are the SESGO caps. Jadis ' newest intergrated I-70 with KT170 tubes Now what. JA30's vs I-70 I think the new I-70 is going to set new standards for high fidelity tube amplification. Not sure why Jadis does not install side handles for any of their amps over 60 lbs. I-70 @ 80 lbs. My tech will install chrome handles on the Defy. @ 75 lbs. w/o handles feels like over 100 lbs. Anyway, this vid gives a hint at what the Defy is all about. https://www.youtube.com/watch?v=xRImqIdXRX4 |
|
Jadis has a hard road up ahead to stay afloat.
~~~~~~~~~~~~~~~~~~~~~ Yeah well that might/might not be true Ck out what Jadis is up to See this is what sets Jadis apart from the rest of the **pack**. No one builds like Jadis. So over priced?? Not really. http://www.jadis-electronics.com/en/i70-57.php |
WEll my tech geek always complains Jadis charges for the stainless steel chassis which costs a small fortune.
The trans are very well made, a good thing. But come on, all jadis products are wayyyy over priced.
Lets get real.
Besides the older model would suit me fine.
Jadis are for Dubai Oil Sheiks.
This idea that brand X is so much better vs brand y and z is snakeoil.
All these big power amps from Jadis is ridiculous.
Jadis should have made
JA30, JA60 and lets say 5 or 6 intergrateds.
The future of high end audio is away from big heavy amps.
As WBers will be the speaker of the 21st C audiophile.
Speakers which really only require 1 watt SET amps.
Caveat, we will need some watts to drive the assist woofers, so 1 watters wont be enough. Bigger SETs and low powered EL34 amps will become The Amps to own.
I'm speaking future, not current audiophile **Ideology cultists* still hung up on big amperage and low sens speakers.
Jadis has a hard road up ahead to stay afloat. |
@mozartfan JA30 are over priced?? I don't think this is a true statement. The new JA30 Mk2, NOT to be confused with the older model JA30, is priced at a point that it would be hard for you to name other competing new products at a similar or lower price point that can better it...but do try. |
I know my manta lately is
**all tube amps pretty much sound same&&
I did say **pretty much***
IMHO
The Jadis JA30 is best bang in tight bass vs any other tube amp on the market ,, in its SIZE/Weight Class.
Now in price class, we can find other tube amps that will deliver same tight bass.
= JA30 are over priced.
|
@mozartfan LOL, glad you like that older vid of my system, prior to the upgrades and new preamp etc., If you liked the sound then, it is a lot more resolving and impressive now. The GH's are the speakers, they use an Audio tech mid/woofer and a version of the Dynaudio Esotec silk dome. They do not use carbon fibre cones or have a neodymium magnet. System has come a long way since then... |
IMHO The JA30 is my fav Jadis amp. Has that bass solid /tight punch of the JA200. Its quite a special amplifer. I saw a pair for 4G's months ago, Would love to swap the Defy out for the 30;'s. but as i have upgrades in the Defy, not doable. The KT150's sound great. But honestly I can't tell much dif from el34,kt88, kt120's, any hoot... The speakers in the vid below has Sonus Faber Guarneri, my guess is the newer models with that incredible Sacan speaker neo dymium magnet. Thats one very special midwoofer for sure. But of course for such a propriatary special made mid, SF wants gold for tha speaker. Like $17G's. I can say its the only xover speaker that I like. Now I know why folks go SF. Its really the only low sens xover speaker i consider in competition with my WBers. My future WBer design will surpass SF's Guarneri's. So I heard this vid,,then went back heard same track on my Defy7. I mean its like 6 of one, half dozen the other. The Defy's 12 tubes **might* offer a slightly superior soundstage as far as separation of instruments, *maybe*, SF is a 2 way,. My WBer design system is Dual WBers + dual Seas W18E001 + a paper tweeter. So its not a fair shootout. I think if we placed a stock Defy Kt88 vs a stock JA30/KT120's. Who knows how it would go. My tech says he does not care for the KT150's, prefers the KT120's, Opinion is a opinion. these KT150's sound super. Both running Kt88's, possibly the JA30 would take the cigar. So if i can't obtain the wonderous JA30. this means I must continue developing my WBer with assist speakers. Which is already in the plans, just waiting on cash. Besides the KT150's in this vid may be new, whereas my KT88's have 4k++ hours on them, not sure if well used tubes lose some of the sheen. This YT vid is no doubt the best sound I've heard on any system, 2nd to none. Thats one very unique midwoofer , carbon Fiber cone + massive Neo Dymium magnet motor. Don't know much about the tweeter. maybe its special as well. 87 db, which is too low for my cup of tea. Which only goes to show the ultimate power of these **little baby* monos. can drive a low sens speaker with dynamic performance. I'd say the Defy has 100 watts, but the lower watts of the JA30 are cleaner with more slam. ...but then The Seas Thors was dual midwoofers, \vs this single,, Perhaps the Defy driving a single mid, might perform as well..Its hard to say. I found the xover type speakers at 87db no competition with a higher sens WBer. Completely annihilated the Thors. Smoked em... https://www.youtube.com/watch?v=nlOhiTpZCek |
@mozartfan Funny you are talking about weight of amps. Yesterday, I was at a dealers and they suggested that I bring in my big Rowland to demo with their YG's. While this made some sense, as the YG's are notoriously difficult to drive, the idea of lugging this amp in..was a definite no no! The JA30 Mk2 mono blocks, while still heavy, are at least quite manageable in this regard. Something that I think maybe should be a factor for us to consider when it comes to living with an amp. |
Even the JA80's are too heavy, Jadis should have made
JA30, JA60 and say about 4 or 5 intergrated and thats it.
|
**not stable,,,flawed design,,** are the 2 comments i heard made by 2 dif local tech geeks.
I ain't buying.
I think Jadis should have only made the JA30 and JA80, a few intergrated.
Whats the point in designing amps weighing over 80 lbs??
|
Here's a look inside at the upgrades. fast forward to 6 mintes,, in this vid, I still have the Millennium tweeter, Which I dumped earlir this year and went WBer set up as heard above. The dual WBers completely annihilates the Seas in midrange fq's, And the chinese paper tweeter is superior to the Seas Millennium ($700!!) tweeter by virture of a higher sens @ 91 db. vs Millennium's crappy 87db. The Mundorf SESGO .47's on each tube really gave up a nice punch in bass guitar/drum sets. Glad i canceled the order for the M EVO.47's and went with the SESGO. The blue adis wires inside are now upgraded to navships 10 gague silvercopper wires. https://www.youtube.com/watch?v=RpVCbHX6jWU |
Jadis JA30mk2 doesn’t even break a sweat handling the GH’s
~~~~~~~~~~~~~~~~~~ I bought the Defy7 wayyyy back in 2009, before I knew about the JA30 monos , Wish i had the monos, as they are more convenient to move around. But alas, stuck with the Defy til.... So i upgarde most resistors to takman Rey/metal and most caps to Mundorf SESGO .47 (12 X$50) + some nice big F&T's as well. Left the big blue Philips alone, extremely musical cap there. can't be improved on. Replaced main cabels inside to navships silver wire. Copper posts on rear. anyway, the Center trans is always cold, never breaks evena warmth. 2 output trans, barely warm to the touch. Of course not driving anything too dif. But goes to show jadis put some cash into those trans. Although the Defy did have a few rumors surrounding the amp, decades ago, I think it was all bunk. This Defy is built like a tank and has ZERO performance issues. I have no idea who started those rumors, but they are all unfounded and a bunch of baloney. Here's the amp in action. All pre tubes are Teles, (Of course). a few Svets ran out of juice, so I had some used chinese tubes sitting on my shelf, stuck those in the 3 slots and works flawless. Hum came around, so I swaped the 3 chinese around between the 3 slots and now no hum at all. This amp is solid and I'm guessing is **self biasing** Yet my tech has some neat bias pots which we will install so it makes it much more easy to bias. The Jadis pots , just a pinch of a screw turn and its either too cool/too hot. But again< i'm wondering if this amp is self biased, thus really no need to swap out the pots>. anyone? Tubes have over 4k hours, maybe 5k. Music starts at 1:25 https://www.youtube.com/watch?v=xcjYiZztHgM |
500 watts available at 4 ohms from the big Rowland transistor amplifier versus 45 watts available via the tubed Jadis . And the Jadis is an equally competitive amplification choice. There’s so much more involved than quantity of power in achieving superb sound quality. No doubt that the Jadis mono blocks have excellent quality transformers and top notch robustly constructed power supply.
Charles |
Daveyf, as I have not heard the Jadis, I have no reason to doubt your words. |
@alexatpos I use two different amps with my GH’s. Not at the same time. The Jadis mono blocks are my go to tube amps, but I also have a modded Jeff Rowland model 8 t ss amp. This amp is a real brute, puts out 250 watts/ch into 8 ohms..and doubles into 4 ohms etc. I can tell you that the gain position on my preamp is about the same for both amps, and that the Jadis JA30mk2 doesn’t even break a sweat handling the GH’s. Same goes for the ss amp.
|
I have not had the chance to try the Jadis and do not want to derail the thread, however, I have paired SF GH with Pathos Inpol 2, Burmester 956mk2 and Krell Evo 302.
Before I tryed the Krell I thought that the other amps are quite sufficient, but to my surprise (I am not a fan of big ss amps) it was the Krell that really 'opened' those speakers.
Few times I have read that some of the folks have even set amps with SF GH and by no means I would argue with anybodys choice, but imho those people with such or similar low powered tube amps will never hear everything what that speaker has to offer
|
@alexatpos I might agree that the original Jadis JA30’s may not have had enough power at 30 watts/ch to show the GH’s at their best; but the new model Jadis JA30 Mk2 has an output of 48 watts/ch ( due to its larger and more robust power transformers and its use of the new KT150 tube).
The new model is as i stated in the reference from Charles above. |
@alexatpos. consider these comments from @daveyf.
"mk2 and the KT150 tubes make this Jadis amp the most resolving and life like sounding amp I have ever had in my system. The Jadis JA 30 mk2’s drive my SF GH’s with ease..allowing the speaker to define the soundstage with great precision. The highs are as pure as any amp I have ever heard and are ( at least to me) a revelation with the silk domes that the GH’s utilize.
With certain wind instruments the sound of air escaping through the horn section can easily be heard and the ‘blat’ that distinguishes the various openings of the trumpet and the sax are now eerily realistic.
IMHO, if these new Jadis amps will work with your speakers, they should be on your very short audition list."
The OP of this thread had a very different outcome.
Charles |
Asa, imho SF GH (had them) would not show its best potential with 30w amps... |
I had a Defy 7 25 yrs ago - beautiful thing. Lugging it over to bias was a pain. Mine never blew up, but finding matched NOS outputs was a challenge, even back then.
I'm retiring in a year and thinking about my "final" (ha!) system in a 16 X 17 room with 12 ft tray ceiling. Thinking about a pair of SF GH's with the JA-30 MkIIs...Let me know if anyone out there is tired of theirs. |
However, the Diapason is worth every penny too! It has the sweet sounding character of 6L6 tube and it really has those magic from Jadis! It hasn't got the deep soundstage or details as the JA80 for sure but it really worth for only just one fifth of the price of JA80! |
Fantastic! Never believe the JA80 can be so dynamic! I am not sure how it compares with the former KT88 model which i haven't seriously auditioned before going to the new MKII. Sound opens up a lot after few months of burning in! I am currently using it in biwiring to drive my Dali Epicon 2 with great satisfaction! Musical, Engaging & organic sounding that drove us to the music. Plenty of power you wouldn't worry about. Regret to own them so late! Cheers! |
|
Just update the status! My JA80 is coming soon! Now trying the new Diapason from Jadis which sounds as great paring with most mid to high sensiti ity speakers! |
@mozartfan Remember, the typical vid you are watching on YT is of the original Jadis JA30, not the 30Mk2...which is a much newer design and frankly, sounds IME very different to the original. ( as it should, since the transformers and KT150’s are very different). If you heard the original, which is highly likely since there are few 30Mk2’s out there, and certainly not many on YT. ( although i think I may have posted a vid). Then you didn’t hear the new amps, plus, like you state, YT vids are basically meaningless when it comes to actual SQ of the piece in question.
IF you do acquire a JA30, (whatever vintage), i would suggest/opine that you DO NOT MOD IT, like you have the Defy!! IMHO. |
@mozartfan Your journey does seem to be one of frustration. Just remember to tell the next owner of your Defy of all of the mods that you have done..they should be interested in that. ;0)
^^^^^^^^^^^^^^^^^^^ Hey davey Well Richard lent me his Allen Organ mono blocks, the big bys the Allen 90's. Right off with jazz ref cds I thought this might be another option for a 2nd amp experience,,,,i was seriously considering buy the pair off Ebay,,but Richard suggests 1st lsiten at least 1 full hour to my ref cds, before making that decision... The JA30's pair over at another site, is out my budget,,,After some testing, I found the Allen's lacking some of the <<musical experience>> during the Allan Pettersson sym 8, which on the Defy offered some subtle musicality that is a trademark of all jadis amps. Afterwards I revisted the 3 YT vids showing off the JA30 in operation,, although my speakers are superior to all 3 in the YT uploads, I could hunch the JA30 <<honestly>> did not <<wow me over>> I'm sure the 30 monos offer something <<other>> than which <<might be>> lacking in the Defy, obviously YT compressed vids hardly tell the whole experience. ,,, Both amps I am sure voice beautifully, <,just slightly differently>> 6 of 1 /half dozen the other. Its possible the 6 88's per channel is really the experience i prefer vs the dual tube/channel of the JA30's. Stock amps, yeah the JA30's seem to be the winner in all areas. But with the Defy *upgardes/mods* I think the Defy now matches the offerings in the stock JA30. Possibly the fture holds a pair of JA30's making their way into my system, 1st have to recoup my losses from my failed tube flipping business. If I add the 30's,, will make the same *upgardes** as in the Defy, new Mundorf caps/Takman Rey resistors. Right now Richard will be looking at what other res we will swap out in the Defy, But unlike the <other tech guy>> he plans to pull the board, Richard likes/ONLY does soldering the correct way = no snip N go thing. WE just completed all new Takman Rey;s in the DPL, and will upload a new vid on that upgrade. For my taste the takman Rey's are a nice upgrade vs Jadis stock metal oxide. Jadis employs metal oxide for its inherent <quietness> of that res. I found the Takman's to offer more musical tones, though some might find that sound a bit <noisey> I am expecting the same results as we figure out which res to swap out in the Defy. Its going to bea 1 time deal, there are lots of res in the Defy, hopefully its a <WNNER> decision. Richard will be working on that upgarde over the next 2-3 weeks. Will upload a vid once completed. For those who might have missed my Defy YT vid showing off upgrades, here it is once again I highly recommend other Defy owners to make these very same upgrades. The Defy has really come to life with new caps, new res. The Blue Philips caps voice so beautifully are<< worth their weight in gold>>, leave those alone. Vid starts around 6:30 https://www.youtube.com/watch?v=RpVCbHX6jWU&t=650s. |
@samhvcc,
I'm certain that you are pleasantly surprised by the sucess you're experiencing with the JA 30 MKII. Your Esoteric amplifiers serve as a high power solid state amplifier reference point. Which of these two amplifiers do you prefer driving the Sony speakers?
1 If it's the JA 30 MKII then it reasonable to assume that the JA 80 MK II may possibly provide 'more' of the same.
2 If overall you prefer the Esoteric amplifiers it may not only be due to increased power but perhaps the possibility that solid state power may be more suitable for the Sony speakers specifically given the load impedance characteristics.
Charles |
@mozartfan Your journey does seem to be one of frustration. Just remember to tell the next owner of your Defy of all of the mods that you have done..they should be interested in that. ;0) |
@samhvcc Once again, from your description of what you feel is still missing from your Jadis/Sony matchup, IMO you are still hearing a classic amp/speaker mismatch. The Jadis JA30Mk2 has plenty of slam and power with the right speaker. Will the JA80Mk2 give your more..perhaps, but will it sound better...only if it can handle the nasty impedance drop better, which frankly remains to be seen. |
Just spoke with Richard Gray, and posed the Q, <<do you think the JA30's will deliver more what i am looking for vs my tweaked out Defy7 is delivering??>>
Richard agrees , suggesting having dual monos will deliver a more true separation of imaging vs the Defy's sharing of the main trans, + shaing the big Philips caps on top of chassis.
I had a hunch after cking over the JA30 design, just a pair of power + separate power trans.
I really do not need the extra power which the Defy offers, as i listen to low volume in my quaint sized listening room.
So now after spending big bucks in all the Mundorf cans, and new Svet's 88's, I realize the JA30 is really what will deliver my classical music is a superior sound stage/resolution, uppermids/upper highs.
I tried to tweak the Defy as high as possible, but seems the JA30 design has a inherent subtle nuances which the Defy is not gojng to ever match.
Live and learn I guess.
Eventually , my plan is to sell the Defy, <<<solderings are done by <<botched job>>, not clean soldering>> as Tech guy mentioned to remove board will cost another $200m to remove in order to get at solder board underneath,, WE decided to just snip the leads , as i figured I'd never sell the Defy,, thinking it will be my <<last amp>>
Seems I made a mis calculation as to future possibilities.
Lesson to audiogones, spend the extra $ to have all mods/tweaks done correctly for future resale value.
The JA30 will beat out the Defy7 in all departments.
My guess is the JA30 will even .might even beat out the new Jadis 100 which replaces the Defy7.
True monos according to Richard Gray is the ideal configue vs a single block amp.
Besides the Ja's weight in at 40 lb each, vs the Jadis100 at <<<125 lbs>>> Ridiculous.
|
At the very beginning I said that my JA30 hasn't got enough power for my Sony. I believed it was due to my newly Sony hasn't been running in yet. But having a longer burning in from my Esoteric monoblock. The drive units goes much smoother than before! Plugging in my Jadis again seems working much much better! Then I would have a conclusion of matching them together isn't be a problem at all. They match well enough for sure now. I would say, enough, but more power, much better honestly for my Sony however! Switching to JA80, which I believe, would extend the potential of Sony, giving more punch & power than the 30. So I would curious to try out how far my Sony can go with the JA80!
|
@samhvcc Color me confused. In one post you state that your JA30mk2 was not a good match to your Sony SS Ar1’s...which I can well believe as the Sony’s have a fairly nasty impedance dip at certain frequencies, now you state that the match was good since you burned in the Sony’s, yet you have let the Jadis 30mk2’s go?? Then you tell us that you will compare the Jadis 30mk2 to your upcoming 80mk2, how are you going to be able to do that when you had a pretty bad amp/speaker match up with the less powerful 30Mk2 in the first place?? Obviously, if you have solved your faulty speaker/amp match up with a correct speaker/amp match up ( assuming the Jadis 80Mk2 is 100% correct ( while I know it will be a better match up, as I stated above, nobody knows for sure how better until the match up is done) it may not be the ideal synergy given the still nasty impedance dip that it too will have to contend with!) surely you are comparing apples to oranges.... |
I have finally ordered the JA80MKII, try to evaluate the differences between 30 ,other than the power itself! Since i was told the 80 is another legend comparing with the 30. It may takes some more months to have my 80 arrived. Anyway, the JA30MKII absolutely has enough power for my Sony's after my Sony has been running in for a few more while! Of course i believe larger power will be better for my main speaker. |
Understand, let me think of it seriously, thanks! |
@samhvcc The JA80 Mk2 is going to give you more power and therefore headroom than the JA30Mk2. It is going to be a much better match to your Sony's. As to whether it will sound better, on your speakers ..yes. However, if one can utilize the lower powered JA30Mk2, then IME the lower powered amp typically sounds better than the higher powered brethren. On my speakers, the JA30Mk2 are preferred over the JA80mk2's. Horses for courses. |
Hi samhvcc,
I haven't heard the Jadis JA 80 but given the description of them on the Jadis web site leads me to believe that their sonic signature would be very similar to the smaller JA 30 mono blocks. The JA 80 doubles the number of power output tubes. Each mono block is heavier by nearly 30 pounds.
That's a quite substantial weight gain and suggests larger power and output transformers and a lager more robust power supply. One would expect the JA 80 to be a better match for the Sony speakers as compared with the smaller Jadis JA 30. So in essence you gain power (And presumably more current capability) with an identical or very similar circuit design.
Charles |
I would believe the JA80 MKII should be able to cover a wider range of speakers choice. |
Having stayed with my JA30 MKII for 3 weeks time, I decided to let them go! Don't get me wrong! These little babies was so good that I would like to go straight to their JA80! Other than the extra power of 80 processes, do you all think they have merits over the 30's? Are they share the same kind of sonic characters?
Thanks! |
@charles1dad Always has fantastic opinions on tube amps in general and SET amps in particular definitely take his sage advice.
@mozartfan a question is the Richard Gray the same Richard Gray that makes power conditioners?
|
@samhvcc The new Jadis JA30Mk2 amps really do respond well to tube rolling in the driver stages. I rolled in NOS Telefunken smooth plate 12Au7's and NOS Siemens 12AX7's, a great match up for this amp.
I have now gone through a number of different tubes in the driver section, from RCA clear tops to NOS Telefunken ribbed plates to NOS Mullards, all are interesting..and depending on taste, one could be preferred over the other, but right now the mix i have is where I am going to stay for awhile. |
Richard Gray just insalled 4 430k Takman Rey resistors in the DPL, wow factor high, can now put more gain on vol, w/o risking any breakup, Not sure what res Jadis has in later models, all i can say is this pre 2000 DPL has metal oxide and the Takman Rey's easily out perform their stock resistors. IMHO all Jadis fans might want to consider swapping out a few res in their pre/amps. I have 12 plate Rey's in the Defy, after Richard installs another 10+ res in the DPL, I will ask if he will take on the Defy upgrade,,,not sure if he is willing, as Richard prefers working clean solders,,,= the board has to come off = alotttt of labor/time,, The other tech just snipped and soldered w/o taking board off, works just fine,,,I doubt if Richard will go alongw ith that style of <<shoddy work>> See me vid on the snip/solder work on all the caps. Sure can't resell like that, but i have no plans to sell the Defy anyway. The result of swapping out the latest res a quad of 430k, really opened up the DPL resulting is nice gains in high fidelity. The Seas Thors never sounded so clean/natural. IMHO Takman Rey is the most musical res in current production,,, the Rex Carbon's were too smooth for my taste in the Defy's power supply. Possibly Rex are prefered for ss amplification,,sort of adds a <<tube-like>> effect of smoothness. For tube amplification, its Rey's all the way. Just ordered the other Rey's we will install. Richard likes to make 1 swap at a time, to see how the circuit responds,,with each swap,, the sonics made nice gains, this last swap was the biggest and best. have no idea where this is/can/will go. Its already <<high fidelity>> I mean once you are on Mt Everest peak,, where else is there to go? I might hold off adding the Seas Bifrost project off. I mean its hard to pass up the Cresendo's incredible velvety power and lushness, but with the Millennium's responding as they are to the new Takmans''' do I really want to spend $2200 on the Bifrost project?? Next year we will see..... Jadis, power/authority with finesse <<but with a lil help from our friends>> https://www.youtube.com/watch?v=kgaUQO4lvII&t=50s |
I have just swift the original driver tube to a pair of Mullard NOS. I can't believe the improvement that it has brought!!
I will change the AX7 to Telefunken as well today to see how they make another miracle :-) |
Congrats on your jadis JA30 monos. If I did not have this Deft7, for sure the JA30's would be my 1st and only choice. I noted most images on google show the 150 tube,,,if that is what you have please consider biasing for the superior Svetlana 6550. Also agree with others suggesting Tele's in the AU/AX pre socket. I have all Tele's in the pre. I noted a slightly superior nuance over all other NOS tubes. The 88 is nearly identical to the 6550, but for me Svetlana has a superior stability/construct vs other russian power tubes...Good thing with the JA30's you can very easily roll as it only takes a pair each mono,, the Defy has a wopping 12 tubes. Also note later on you may consider upgardes on the caps. Ck out my defy7 upgrades... Also in the middle of having Richard Gray swap out all the stock Jadis Metal oxide resistors in the DLP to <<Takman Rey Metal>> and the results so far are stunning. Superior resolution.. Ricahrd's last suggestion in my tweaks is to swap out the 1st AX tube in the DPL fora 12AU7, gone was the slight murky mid/boominess. We have ,,ohh another 15+ resistors to swap out. Not sure which res the new JA 30 use, but if they are the old stock Metal, I'd suggest trying some Takman Rey in the power supply circuit. Then go from there,,But most certainly the cap upgarde was a nice neauance gain. Went with Mundorf Supreme EVO SGO, = nota cheap upgrade @ $45 each x12 ,,but end result was worth it vs the lower cost EVO SGO. Here are some vids of my new upgrades. I will posta vid after all res are swaped out...maybe 3 weeks, Richard is taking it section by section, a pair here, there,,, this way I can note exactly how each res swap changed the sonics. So far = SUCCESS! Mods can be seen at minute 6 and music starts about 11 minutes into vid. This vid is with a LS9 preamp <<Jadis clone with M caps> now sold. Also I now havea new Shanling 3000 cd player and beats out the Cayin CD17 in this vid + I have new xovers which are NOT in this vid. I am nearing the end of all my upgrades,,,= another 4 weeks will be fully completed. Just waiting on Richard to finish installling the Takman's in the DPL and maybe we might go with Takman in the Defy,,I have takman Rey in the Defy's power suplly circuit,, the Takman Rex Carbon were too <,smooth>> = warm,,I prefer ide cold highly defined/separation. = more lifelike sound stage. anyway here's 2 older vids. https://www.youtube.com/watch?v=RpVCbHX6jWU&t=1097s\ and the DPL with Mundorv EVO SGO and some Takman,,and the AX in the 1st socket which is now a 12AU7 and sounds superior. btw the tube buffer cd out which has critics griping about,, I found to be superior vs the AUX out. music starts around 6:17,, this has the 12AX7 in the 1st socket which did not affect the Cayin's perf,,,but did make my new Shanling cd player sound,,,too <<wooly/bomy>> witha 12AU7 in that socket, made the Shanling clean more soundstage = which is why the Cayin will be up for sale in 1 week. I do not need 2 world class cd players,, Both are built like tanks = the Shanling will last forever with no repairs. https://www.youtube.com/watch?v=K7iPHN9r_SYJadis sings music like The Angels. and built to last forever with no worry about making repairs. |
No doubt each individual designer or manufacturer has their own ideas and philosophy regarding the best approach to produce good sound quality. I certainty haven't heard every ARC or Jadis amplifier but based on my limited sampling I'm more draw to Jadis. Obviously this reflects nothing but individual taste. Thankfully High End audio has something available for a multitude of different tastes,
Charles |
