Jadis DA 60 Integrated

Trelja - no need to apologize, and thanks for the added insights.

Phaelon - The design pholosphy behind both of them is quite different, The DA60 is a Class A/AB design where power is key in the decision process, the DA88S (or my own DA50S) are pure class A designs (more recent models in the Jadis line) where the benefits of class A is important (more liquidity, better textured and relaxed presentation).

I am not saying that the DA88S sounds better than the DA60, it is just a matter of deciding the balance you are looking for in power and delicacy variables, any of them will serve you well in any system configuration and are great amps in the market by all means.

Thank you Flg2001. Not wanting to oversimplify things, but are you saying that the DA60 is the more dynamic of the two while the Da88 is more nuanced and refined?

Flg2001, where are you getting your information about the DA60 operating in Class A/B?

Jadis has always advertised the DA30 and DA60 as operating in pure Class A. The power consumption figures are listed as being the same as their respective counterparts, the DA50S and DA88S. I can't speak to the DA60 or DA88S in terms of bias with any authority as I've not measured them on the bench, but from getting my Defy DA30 together, it's Class A. Indeed, I was told by a fellow I correspond with at the factory that the Defy DA30 that I own (built in 1990), which is the original Jadis integrated, is biased the most heavily into Class A of all of the integrated iterations, and more reflective of earlier Jadis philosophy if you know what I mean. Overall, the DA60 seems to be mostly of the same mind (there surely are differences, circuitwise, some of which more meaningful than others), apart from doubling the tube count and upping the transformers considerably.

I'm not necessarily refuting you, but I was told the newer generation represents some tidy improvements in both circuit and implementation (for example, a more elegant and efficient selector control) as well as details which provide more optimization with the focus on using KT88 (and 6550/KT90) output tubes, whereas the older variety run very well (I would say optimally) with EL34/6CA7/KT77 tube types. The newer amps supposedly also run the smaller tubes, but for whatever reason, the larger ones are recommended. Anyway, I'm told these things result in what they like to call a more "black and white", as opposed to "grey", kind of sound - see my more clarity, detail, etc., and perhaps bit less romance and sweetness ala the general trend in high-end audio through the past decade. In general, as you said, more reflective of how Jadis thinking has evolved towards the current time.

Why do they offer both old and new product lines? Though I've asked several people, I've never gotten what I consider a good answer from anyone on that.

Phaelon - I have had the opportunity to hear them all - either in my own systems, or at friend's installations, and some at the local dealer show rooms. Both the DA60 and the DA88s produce a very dynamic presentation and handle almost all kind of speaker load and sensitivities with easy, to my ears the DA88s is more refined and textured, which might seem apealing to some since others would lean towards a more solid articulation of notes and a tad better attack of the DA60 - again - both are excellent and would not stand on the one-is-better-than-the-other camp at all.

Trejla - My appologies for the confusion I created on the A/AB design - reading again and checking with the Jadis dealer he confirmed, as you also said, that both are pure class A implementations and the difference in design reside in some better parts selection on transformers and shortest signal paths of the more expensive Signature desgins.

Finaly - I decided for the DA50S over the DA88S because of the additional purity I got from just two tubes per side against 4 per side which was noticable at least for me for the kind of material I listen the most (Jazz, Early Music and Blues).

Fernando