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
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