Jadis JPS2 – Dual Chassis Line Stage Preamplifier System – NOS (New Old Stock)
SkyFi Audio – Curators of Vintage Audio Gear
SkyFi Audio is a small startup business specializing in the purchase, reconditioning, and reselling of high end audio equipment. We only buy equipment that we admire and are passionate about. No mid-fi, no gimmicks, no junk.
Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. If it does not meet or exceed the original manufactures specifications, it will not be sold. We are very selective about the equipment we purchase, focusing on mostly analog, high-build quality, American, and European built units.
Through our sister company, which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Project, and Sony ES, we have access to OEM parts, service, and support.
———-
This is a unique, rare, and beautiful line stage preamp from renowned french maker Jadis.
This piece was purchased in the late 1990’s and then promptly put aside for a reference system a client of ours was assembling. The system never came to fruition, and it has therefore sat in climate controlled storage since new.
We very carefully tested both pieces to make sure they are working perfectly for their new owner – which they are beautifully.
$14,000 MSRP back in 1998. In today’s dollars that equals $22,000.
SPECIFICATIONS
Type: Line preamplifier with separated power supply
Gain: line 24dB – CD input 18dB
Input: type 5 line, 2 output, 1 tape monitoring
Bandwidth: 20Hz to 740kz @-3dB
Number of blocks: 2
Tubes list: ECC82 X 1 ECC83 X 3 EF86 X 1 EL84 X 1
Dimensions: 17″ x 13.6″ x 7″ each (430 x 345 x 175 mm each)
Weight: 68 lbs. (31 kg)
Consumption: 50W
From the Jadis Original Sales Brochure:
Available in balanced (JPS2S) or unbalanced (JPS2) version.
The Jadis JPS2 is a line preamplifier which uses 3 ECC83 for the line function plus a ECC82 tube to adapt the impedance on the CD entry. Its specific power supply recreates a voltage for the module with a 80 Hz frequency in order to avoid problems that can occur due to the 50 or 60 Hz frequency from the mains supply.
The high voltage is regulated by two tubes: 1 x EF86 and 1 x EL84.
Golden connector and further connections are in copper and silver which assure the faithful broadcast of the audio signal.
The “point-to-point” wiring gives to the sound stage plenty of aeration and dimension.
The choice of the electronic components and the extremely careful fabrication method gives the signature JADIS to this device.
REFERENCES
Impressively wide soundstage, it feels like pushing the walls, everything becomes clearer, easier. holographic! The build quality is superb and reliability is recognized by all. This preamplifier is clearly a reference among the best.
Cf. essai Haute Fidélité n° 165 Avril 2011
bancs-dessai/22-pre-amplis-amplis/230-jadis-jp2-se845-nec
The SkyFi Testing Process for Tube Preamplifiers at SkyFi:
We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.
We also test all tubes for output gain and leakage on our calibrated modern and professional tube tester against the original manufacturers specifications.  If needed, the tubes will be replaced from our vast NOS  (New Old Stock) vintage or modern inventory.
At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.
Final testing involves putting actual music through the preamplifier We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage Kef speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.
———-
PURCHASING GUIDELINES:
1)
This item will be professionally packaged and insured for safe transit to your home unless you opt for local pickup from our shop. All local pickup items are only wrapped in industrial strength clear stretch wrap if the original manufacturer packaging is unavailable.
Local pickup is available in Glen Rock, NJ, just a half hour drive from Midtown Manhattan, with convenient parking near our building.
If we don’t have the original manufacture’s packaging, we use heavy duty double-ply corrugated boxes with custom made to your item SealedAir Instapak expanding foam custom inserts. In many cases this has proven to be better than the original packaging!
We also use high quality fiber reinforced tape to seal our packages. Lightweight items will be bubble wrapped and shipped in a high-quality box.
2)
We do not review or accept any offers that do not go through the official eBay system. We have too many items for sale and it is nearly impossible to keep track of offers outside of the official system. Please do not message, email, or text any offers.
3)
All listings are eligible for the eBay Global Shipping Program, unless the item exceeds the maximum weight/price requirements to your country. If this is the case simply message us via eBay as we accept bank wire transfers for international payments and frequently ship worldwide via UPS.
4)
Please ensure your shipping address is correct within eBay as we will ONLY ship to the eBay/PayPal Confirmed Shipping Address.
No exceptions.
5
) eBay may charge and collect sales tax to your state/jurisdiction. Please understand we have no control over this.
eBay v1.5
Item
Included
Original Box
Not Included
Manual
Yes Included
Remote
Not Applicable
Cables
Yes – Power Only
Physical Condition
8 / 10 (New Old Stock)
Working Condition
10 / 10 (New Old Stock)
eBay integration
by