Jadis Preamps JPS8, JPS2 and JP80

The difference between the JP200 and the JP80 is in part a sense of ease--it never hints at being strained by anything I throw at it, and macro-dynamics are handled as well as the micro-dynamics. It DOES make a difference with preamps. Otherwise, it is hard to compare the two in my case, because my JP200 was a special version which initially was thought to be the successor mk II version, using EF86 tubes rather than 12AX7s in the gain stages. The EF86 is cleaner sounding at low volumes than the 12AX7s, which needed some volume before they sounded their best, IMO. Otherwise, the two are comparable, the 200 is just that little bit more real.

Did finally sell my 80s. The Jadis were wonderful to listen to, but definitely colored and rolled in the highs (fat in the bass too, but not a concern for me as I bi-amp). The Lamms are far more neutral than the Jadis, but still manage to get the midrange and natural dynamics right like the Jadis, and Lamm equipment (in my case, the LP2 and the ML 1.1s) seems to work very synergistically with the Jadis preamp. Interesting that two pieces of equipment so diametrically opposed in their design philosophy (Jadis was desined in large part through listening, Lamm strictly by measurements) can both get it right. More than one way to skin the proverbial cat.

Rcprince is correct the stock Jadis JPS 2 or JP80Mc does not have the level of transparency at the top as more modern designs like the Lamm however this is only the case with the stock unit.

My stock Jadis JPS2 uses the awful sounding brass Cardas female RCA jacks through out and appears to also use cards internal wiring which is not especially neutral or detailed. In early 2006 I plan to replace all of female rca's with pure copper vampire jacks and upgrade the internal wiring with better sounding cable. I also plan on using 6.4% silver/copper lead free solder on all soldering joints which sounds much clearer and cleaner than current leaded solders used most commonly today. Just these changes alone will greatly help to bring this fine design more current using top rate connectors. Also planning on replacing the stock male IEC located in the power supply with the much better sounding Furutech FI-10(g). Other future improvements include removing some of the older capacitors in the power supply and replace them with Black Gate electrolytic caps. There are other changes such as upgrading the coupling capacitors I might try later.

When the Jadis products were originally manufactured they used some of the best parts that were available at the time but times have changed. Better and superior copper connectors, wire, solder and caps are now available that were not 10-15 years ago. The basic Jadis design is still top notch but many of the parts are not and in this regard the unit can substantially improved without changing the character of the unit.

Johnny

I spoke to Jadis in France and found out that JPS8 was designed using JP800 schematics. And JPS2,as Rcprince mentioned, was designed using JP80 schematics.JPS2 and JP80 are still best preamps Jadis produced so far. According to Jadis every aspect of JPS2 music reproduction is superior to JPS8.

Thank you guys

I'd add the JP200 to the list of the best preamps they've made so far--what it is in reality is a JP80 for each channel. I had a hunch the 8 designation maent it was like the JP800, which I have never seen or heard.

Johnny is right in that the stock Jadis can be made to sound different by changing some of the stock parts. I would be careful about that, however--take a look at Trelja's post on another thread about the DA60 he bought that had been modified. There are some mods that can be made that will improve the sound of the Jadis but there are some that will change its character, even if delivering better measured performance. Be careful what you play with in there.

I have owned a jp80 for 16 years,it is tube regulated and has ahigh volts b plus transformed winded in a similar fashion but with hmusical sounding pre amp to a fast detail retaining musicality and opennesseavier gauge magnet wire done by myself,i did replaced allresistors and audio caps usingMIT on phone and copper fiol papere in oil by Jensen I even aded a choke to filter the Hv . The Mc circuit was lousy sounding to my ears,dismantled and replaced by 2 Hashimoto step up trannies..All said it turned from a bit dark slow a bit oscure musical pre to amore detailed fast, retaining the wide sondstage and musicality.No way to replace it ....never will.Long happy mariage.