Would Jadis Orchestra work for Dunlavy IV?

As much as I like the Cary products, the Jadis is a different league in terms of refinement, in my opinion. If you've heard the Jadis midrange you'll know what I'm talking about--there's a naturalness to the Jadis electronics that is very rarely heard. SC-IIIs might be a better match for the lower powered integrated, as they don't have the lowest bass that puts more demands on the amp, but I still think that it will work with your IVs as well, just don't expect bass "slam" or particularly tight, well-controlled bass (it will be full, though), especially if you use EL-34s.

I ve try many different tube amplifers with my dunlavy sc-IV a few years ago.I think the BAT VK-60 is the best match for the dunlavy.

Pierre Gabriel, the US distributor suggested that the Jadis DA-30 would do a better job on Dunlavy IVs due to its all of 30 Watts Class -A power. It would perform twice the power as compared to ORC. I am really tempted. I am going to audition these amps at the local dealer. Too bad I can't take my IVs with me. I would try to bring the amps home for audition if they let me.

I wouldn't be surprised since, of all the Jadis amps up to the JA-200, the JA-30 had, in my opinion, the best bass performance. And I do like the DA integrateds even better than the Orchestra. They should let you take it home if you agree to buy it if it works in your application. Let us know how it turns out.

Having owned the JOR previously, and now the DA30, I can say that the DA30 has NOT done a better job in driving the two pairs of loudspeakers I own.

The JOR's "40 wpc rating" is really taken from the Orchestra, which uses EL34s, with smaller transformers. I am unsure of the actual power of the JOR, which used KT90 in my former amp, and currently sold with KT88. I have read 53 wpc, but never anything official. But, it quite possibly could be more. Yes, the JOR operates in Class A/B, and the DA30 in Class A, so there is a lot of apple sauce and orange juice here in trying to compare them on paper.

Like you, I was also told the DA30 was the stronger of the two amplifiers. But, in my case, the JOR easily offers more ultimate power. I will say that before the DA30 runs out of steam, and becomes very wooly sounding, it sounds far more authoritative than the JOR.

They are quite different sounding animals actually, to my very great surprise. The JOR's midrange, once I retubed with JJ Blue Glass E34L has yet to be eclipsed by any stereo system I have encountered. With my Coincident speakers, it was simply perfect. The DA30 has not presented that with me yet, but the sound it produces through the bass and lower midrange is incredible. Not like almost anything being produced today, which tends to highlight the presence region. No, the DA30 offers tremendous liquidity, richness, and weight.

I need to include that my DA30 is of 1990 - 1991 vintage, and the current iteration has some differences. Also, one would think Pierre Gabriel would know best, as he has both readily at his disposal. Still, I must relay my own personal experiences, for what they are worth. And, as my friend Rcprince alluded to, a Jadis is something that most people these days just cannot truly appreciate due to their lack of exposure. Most unfortunate. If you have the chance to own one in the right circumstances, which is the crux of your question (and I cannot help in that regard), I highly doubt you will be disappointed.