It is the first amplifier created by the JADIS in 1983; it has been upgraded several times but remains the flagship of the brand. The Orchestra Reference Mk.II preserved absolute polarity (ie, was non-inverting). designs I heared without sacrifice of air, image focus or ambience. 45 Watt. chain). the result of a highly-focused study undertaken by Jadis to meet the With the new tubes, the voltages across the plate resistors before adjustment were 138 and 31mV (left), and 158 and 134mV (right). Before beginning the testing, I carefully reinserted the broken tube in the correct orientation—the Orchestra's heater circuit is active for the output tubes only when all four tubes are installed and making contact. Sound flows above speakers. It requires manual biasing, however this allows a surprisingly affordable price which brings Jadis performance to virtually any music lover. to audition to Class A models like DA30 etc. Also bass is excellent Also I will say that is so addictive that you cannot hear another amp Orchestra is the heart of music: The flow. addition of wooden panel to the two sides of the chassis. It can work with various types of penthodes: KT120, KT90, KT88, 6550, 6CA7 or EL34. Weight 21 Kg  Bias Manual - adjustment when the tubes is changed  Power The Orchestra is a hybrid design with a solid state preamp and tube output. the category. Fig.1 Jadis Orchestra Reference, volume control set to maximum, frequency response at 2.83V into: simulated loudspeaker load (gray), 8 ohms (blue), 4 ohms (magenta), 2 ohms (red) (2dB/vertical div.). The bias is set by measuring the DC voltage across each tube's plate resistor and adjusting a small trim pot until the voltage measures 200mV. tel 059-685054, Orchestra, the latest even more rich-lush and stress-free. I had a problem inserting the EL34 output-stage tubes: the positioning lug on the tube's bottom didn't make a sufficiently positive engagement with the matching cutout in the ceramic tube base. It is the first amplifier created by the JADIS in 1983; it has been upgraded several times but remains the flagship of the brand. Analog Corner #302: 25 Years and Counting, Acoustic Geometry Room treatments (before & after), My current and likely the last home audio setup, Fascinating wiev by Verity Audio Sarastro, Bose 901 Series 1 & 2/PS Audio/Sony System. Also something rare: I found transient speed very good After adjustment, the best I could achieve were 198, 199, 205, and 202mV, respectively—all very close to the correct value, and better matched between each pair. For Jazz, Classical (especially stringed It works in a "push-pull" configuration with triple load and autobias. They sent me the relevant pages from the service manual to show me how. Frequency response: 5Hz–60kHz, –3dB. contributes my speaker cable: I prefer to use as my absolute reference presence is rare and not heared before in any KT88 design of the price finish and looks of Jadis - also something very special for the money. and very well defined -with air and attack- for such design , KT90 I note like never before. Secondly, listening to the amp for the first-ever hour, I Height of sound is another tube rolling with Orchestra. This dislike of low impedances can also be seen in fig.6, which plots the THD+N percentage against frequency at a modest output level into 8, 4, and 2 ohms. boldness (together with pin-sharp imaging and sweetest but analytical public. Unbelievable good flow . The Reference model includes several significant upgrades over the standard Orchestra. But the Orchestra Reference's sense of scale was, as suggested earlier, very satisfying overall, with the ability to sound big without sounding merely puffy. My measurement of the maximum gain at 1kHz into 8 ohms was somewhat lower, at 33.3dB. timber, transparency and dynamics : Jadis musicality in all its majesty. Although Jadis says the Orchestra is optimized for a 4 ohm load, repeating this test into 4 ohms (fig.5) indicated a slightly higher level of distortion at low powers into this load, and the amplifier reached 1% THD+N at 15.5Wpc into 4 ohms (8.9dBW), and 40Wpc at 2.6% THD+N. Sidebar 1: Specifications. Audiophile Zone High End Affordable Audio Los Osos California Jadis Orchestra Reference [Orchestra Reference] - Special order, allow 4-6 weeks for delivery. Channel separation at 1kHz was good in the L–R direction, at 76dB, but less so R–L: 60dB. I contacted Bluebird again, who reminded me that, as the Jadis Orchestra is a fixed-bias design, I needed to reset the bias for the four output tubes. range. (Luciano Pavarotti), https://www.ilgazeboaudiofilo.com/t11768p150-l-impianto-di-fausto-full-yba#636110. Also imaging is top class. Kingdom. It is a derivative of the popular Orchestra Reference but it includes a tube upgrade from EL34 to the more robust 6CA7 industrial tubes and some proprietary internal tweaks. But I do question the wisdom of choosing fixed bias for the output tubes, given how fussy the amplifier seems to be about the bias setting and the fact that, if the owner needs to replace a tube, it means a trip to the dealer to have a service technician readjust the bias.—John Atkinson. A Real, Live, In-Person Hi-Fi Event in Pennsylvania, with Actual Humans! :) At last, I will go A Real, Live, In-Person Hi-Fi Event in Pennsylvania, with Actual Humans! Warranty: 2 years (90 days on tubes). recognisable transformers, the conventional wiring, the qualities of Better I would say 5-10 I think none is better. Fig.8 Jadis Orchestra Reference, spectrum of 50Hz sinewave, DC–1kHz, at 2W into 8 ohms (linear frequency scale). The THD+noise at 500mW into 8 ohms was very high, at almost 1% of pure second harmonic, which seems much too high for a design using EL34 tubes. I measured the Jadis Orchestra Black using my Audio Precision SYS2722 system (see the January 2008 "As We See It").The Orchestra Black appears to be very similar to the Orchestra Reference Mk.II that Art Dudley reviewed in December 2015. Tube complement: four EL34, two ECC83. First of all, I The wideband, unweighted signal/noise ratio, ref. Sound flows above speakers. This amplifier is a very special one. I measured the Jadis Orchestra Reference Mk.II using my Audio Precision SYS2722 system (see the January 2008 As We See ItAs We See It violin notes in place with the rest of the notes, as a whole never A classic 40 watt EL34 Integrated Amplifier The Jadis Orchestra Reference is a hybrid design featuring a solid state preamp and tube output. pleasure and stunning musicallity that is rare for the asking price. Outputs: 1 single-ended (RCA), two pairs of binding posts. Audiophile Zone High End Affordable Audio Los Osos California Jadis Orchestra Reference [Orchestra Reference] - Special order, allow 4-6 weeks for delivery. Concerned that our sample of the Orchestra Reference Mk.II had been damaged in shipping from Art's place to mine, I informed Bluebird Music, Jadis's North American distributor, of this; they sent me a new set of tubes, in case the high distortion was due to a faulty tube. Die Orchestra Reference ist ein wunderbarer Allroundkönner, die in dieser Preisklasse eine absolute Ausnahmeerscheinung ist. Serial number of unit reviewed: 3819. Io non sono un amante delle valvole .... in bella vista! Sidebar 3: Measurements. Damit erzielt die Reference eine Leistung von ca. However, when I plotted how the THD+N varied with power with the new tubes, the distortion rose rapidly, reaching 1% at 2.8W into 8 ohms and 3% at 19.8W into 8 ohms. under $1500 USD reference the Acoustic Zen Satori MkII speaker cable, Piano recordings combined with med.eff. qualities that one expects from a Jadis product - its particularly Amplifier Jadis Orchestra Reference Bearing chassis is made of polished stainless steel, gilded bezel with black scales, machined handle - all in perfect harmony with wooden side panels. Web: www.jadis-electronics.com. L'importanza US distributor: Bluebird Music Ltd., 271 Woodward Avenue, Buffalo, NY 14217. Note the sharp rolloff above 40kHz, reaching –3dB at 50kHz into 8 ohms (fig.1, blue and red traces). Add to all this good stuff liquidity and But when I began to examine the Orchestra's linearity, I ran into another problem. sorry for any syntax or grammar error. Fig.2 Jadis Orchestra Reference, small-signal, 10kHz squarewave into 8 ohms. From Beatles to Beethoven di Sbisa' e punto vendita chiedere, info@audiocostruzioni.com   more. NAD Masters Series M33 streaming integrated amplifier, Aavik Acoustics U-380 integrated amplifier, Jadis Orchestra Black integrated amplifier, Quad Artera Solus integrated amplifier/CD player, Schiit Audio Ragnarok 2 integrated amplifier, NAD Masters Series M10 streaming integrated amplifier, Devialet Expert 140 Pro integrated amplifier, Aesthetix Audio Mimas integrated amplifier, Mark Levinson No.5805 integrated amplifier, Gramophone Dreams #41: Auris Nirvana headphone amplifier & Focal Stellia Casque de Musique headphones, Jonathan Weiss: Oswalds Mill Audio & Fleetwood Sound Company, Recommended Components: Fall 2020 Edition, Re-Tales #1: George Vatchnadze's Newest Gig. http://www.jadis-electronics.com/popup-ampint.php?id=110&lang=eng Forget Commendably, the responses in fig.1, taken with the volume control set to its maximum, didn't change at lower settings.