In order to provide delicate details and high dynamic for wide variety of music, this unit is designed with great deliberation using famous Pentode EL34 in a new designed push-pull circuitry. Values of each part and current are set precisely so that tube power amplifier could drive modern speakers well.
Push-pull circuit further refined from Overture
The first stage and driver stage are direct coupled, and a new generation pure silver foil capacitors with vibration suppression are used for coupling with the output stage. Moreover, the low impedance design of the whole circuit is aimed the direct sound performance. The output stage continue to employ CCB (constant current bias circuit). The music signal is prevented from flowing into the bias adjustment VR, enabling pure signal transmission.
Internal wirings are skillfully arranged so that shortest paths and best performance are obtained. SSW (Silk Silver Wire) are used for internal wirings. Ls-41 are used for paths in which shielding are needed.
Super High Quality Parts
All parts were carefully chosen after massive hours of listening tests. Silver foil capacitors, silver lead resistors, SSW silk silver wires, Ls-41 shield cable, Audio Note custom made output transformers and power transformer. All CR part are carefully selected and arranged.
Product EL34 Push-Pull stereo power amplifier
Rated Power 32W + 32W @1kHz, 1% THD
Frequency Response 6Hz ～ 110kHz (+0dB -3dB @ 1W)
Input / Impedance 2pairs (RCA, XLR, unbalanced) / 70kΩ
Output 4Ω, 8Ω
Noise lower than 0.5mV
Vacuum tube EL34 x4, 12BH7 x2, 6072 x2
Power consumption 180W
Dimension 438mm(W) 204mm(H) 369mm(D)
*Due to the characteristic of the vacuum tubes used, it takes around 15 minutes to reach nominal sound quality and performance level.
Kagura 211 parallel single ended monaural power amplifier has been accomplished by putting every know-how that Audio Note/Kondo created.
The world of elastic and coordinated sounds can be delineated only by analog amplifier, where music breathes of original sounds are brought back.
The new perspective flagship power amplifier is how Audio Note/Kondo would really like to be listened to by those who have been indulged in the deep charm of music.
1989, the year of the bright history of Audio Note.
Audio Note's ONGAKU was born this year, instantly attracted attentions from audiophile around the world.
Audio Note's vacuum tube amplifiers started shipping overseas. Reviewers from leading audio magazines, e.g. "Hi-Fi Choice", "Audiophile" from UK and "The Absolute Sound" from US, reported their surprises and appreciations about the good sound qualities which they had never heard of. Among them, ONGAKU which employed big size power tubes 211 in the amplification stage; stole the hearts of audio fans with her overwhelming expression of rich musical details.
ONGAKU's magic and its good comments are still spinning around the world without slowing down.
Audio Note's high reputation and good comments are building up on this solid platform.
Product 300B push-pull monaural poweramplifier
model Gakuoh II
Rated power 20W @1kHz, 5% THD
Frequency response 10Hz ～ 40kHz (+0dB -3dB @ 1W)
Input / Impedance 2pairs (RCA, XLR, unbalanced) / 70kΩ
Output Select two from 4Ω, 8Ω, 16Ω when order
Noise lower than 1mV
Vacuum tube 300B x2, 6CG7 x2, 6072 x1, GZ34 x2
Power consumption 120W
Dimension 294mm(W) 284mm(H) 485mm(D) (excluding protrusions)
Newly developed driver circuit unleashed the full potential of 2A3 which had never been achieved.
High quality handcrafting with module style amplifier sections. Kondo original parts and silver wires are adopted.
Parallel single ended circuit to get the best of both sound quality and useful power.
Full copper chassis is used to realize lively and open sound.
Silver Output Transformers
Rich and direct sound is obtained with using pure silver winding and multi-layer, multi-compartment structure. Winding are all done by skillful technician hands using pure silver wires.
Silver capacitor which use pure silver foil as electrode. It is specially designed to prevent the potential oscillation with the foil, which can easily generate muddy sound when lignal surge from low to high level.
All silver foil capacitors are Audio Note hand made.
Original Silver Wire "SSW"
All conductor materials are pure silver. In order to supress the unwanted vibrations, natural silk is used and twisted around the silver conductor. It works as an insulating layer between the silver wires and the exterior PVC jacket.
Product 2A3 Parallel single ended stereo power amplifier
Rated Power 8W + 8W @1kHz, 5% THD
Frequency Response 8Hz ～ 35kHz (+0dB, -3dB @1W)
Input / Impedance 1pair (RCA, unbalanced) / 100kΩ
Output speaker 4Ω or 8Ω preset in the factory
Noise Less than 1mV
Vacuum tube 2A3 x4, 6072 x2, 12BH7 x2, 5U4GB x1
Power consumption 140W
Dimension 430mm(W) 233mm(H) 314mm(D)
A new Overture with substantial improvements
Blending the high power output of Pentode EL34, with Triode's iconic richness in musicality.
Fully unleashed the wildness and dynamic of music while having all micro details expressed with textures.
Audio Note's philosophy of an ideal integrated amplifier. A simple audio system of excellent balance. Capable of giving the best from details, dynamic and musicality.
New design guideline "Cleaner with more Triode Splendidness" was refined through extracting the knowledge we learned from Kagura researches and applications.
New output transformer was designed for higher sound quality. By introducing a 3rd winding exclusively for NFB and re-calculated feedback amount, a well balance of dynamic and low distortion is realized.
Power and sound quality co-exist created by circuit re-design and re-tuning most CR values.
Power supply section is heavily improved and re-layout for outstanding channel separation.
Improved version of KONDO original silver foil signal capacitors for highest reliability.