Tube Power Amplifiers
2019-06-12 13:43
จำนวนครั้งที่อ่าน : 1,186
845NEC
The 845NEC provides 40W per channel in pure class A using 1 ECC83, 1 ECC82 2 EL34 and 2 single ended 845NEC per channel.The 845 push-pull brings twice more power than the SE845 while keeping details and musicality.
JA30 MKII
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JA80 MKII
The function phase shifter is insured by a triode double ECC82 and the function driver by an ECC83. The output transformer, guaranteed for life, allows an adaptation of impedance from 1 to 16 ohms. The cathode circuit is protected by an individual fuse. The power transformer is oversized for a better dissipation of heat and vibrations. The filtering of the high voltages is assured by high capacity capacitors. Heating the tubes is by alternate current with balance and noise reduction. Output terminals allow a bi-wiring. Gold connections assure a faithful broadcast of the signals. The device is assembled with conventional cabling "point by point" and uses a silver / copper tin solder. The frame, in 316L non-magnetic stainless steel, does not influence the electronics and renders the device unsensitive to external disturbances.
JA120
The function phase shifter is assured by a triode double ECC82 and the function driver by an ECC83. The output transformers, guaranteed for life, allow an adaptation of impedance from 1 to 16 ohms. The power transformer is oversized for a better dissipation of heat and vibrations. The cathode circuit is protected by individual fuses. The filtering of the high voltages is ensured by high capacity capacitors. The tubes are heated by alternate current with balance and noise reduction. Two output terminals allow bi-wiring. Gold connections ensure a faithful broadcast of the signals. These devices are assembled using "point to point" wiring with silver / copper solder. The frame is made of non-magnetic stainless steel which protects the device from external disturbances. Released in 2013, the new JA120 builds on Jadis' tradition of combining fine hand craftsmanship with state-of-the-art innovation and design. The JA120 benefits from several important enhancements and raises the bar with no-compromise regarding audio performance.
JA200 MKII
The output stage of the JA200 uses 10 KT88 on each mono amp. For thermal dissipation reasons, theJA200 is built on four chassis : two amplifiers and two power supplies. Each chassis is the size of a JA80 mono amp. The JA200 will take you where very few have gone before; 160 watts of pure class A power. This four box set of ultimate musicality features two mono-block amplifiers each with its own separate power supply. Probably the last amp you'll ever buy...
JA500
Flagship power amplifier. The JA500 is made of 4 blocks: two for power supply and two for amplification, it has the same number of tubes as the JA800 had but has improvements in reliability and ease of set up. These power amplifiers can delivers a mind-blowing 350 watts per channel
PA100
The new Jadis PA100 is a stereo power amplifier that uses 12 power tubes. It produces a total power output of 150W in AB class. At the first sight one can see that this power amplifier is definitely from the Jadis' line of products. Golden front plate, high quality chassis, point-to-point wiring, massive output transformers and power transformer. As for all Jadis' units the PA100 is handcrafted in Villedubert in the Languedoc area.
SE300B
The SE300B supplies a power of 10W RMS and functions in pure class-A with single-ended mounting (the two tubes are in parallel) with an automatic bias. The two high voltages, driver and power, have vacuum-tube power supplies. The bandwidth (at –3dB) is from 20Hz to 20kHz, without any feedback. The driver stage, powered at 400V, is built around a double-triode 6SN7. The two elements of the tube are mounted in cascade. The output stage is powered at 320V, which allows the tubes to work in the best conditions.
SE845
The SE 845 design is in response to the demands for natural and dynamic musicality and the technical choices for this amplifier have been made with this requirement in mind. For the 845 triode to be effective, it needs an incoming signal of high amplitude under low impedance : The ECC 83 double triode ensures the gain in tension, while the 6SN7 ensures the impedance adaptation between the driver stage and the power stage.
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