It ’s been a long time since I ’ve commented on Opel ’s products, because there are too many models of Opel in recent years, and the update speed is very fast, so I do n’t know where to start. Now I come to comment on the old model of M100, it is inevitably suspicion of renewed talk. However, this M100's 10th Anniversary Edition is very different from the previous version. Compared with the previous three generations of M100, M100SE, and M100Plus in terms of appearance, structure or sound, this 10th Anniversary Edition is a brand new concept.
M100 is Ober's debut, and today marks Ober's 10-year history. As early as the early 1990s, Shenzhen Dajidian, Beijing Guanshi, Zhuhai Spark and Beijing Ober created the precedent of China's Hi-Fi tube machine industry and was China's earliest "fever bile machine" brand. Later, in the late 1990s, due to market shrinkage, Dajidian and Guan's have been relatively low-key. After entering the new century, Dajidian returned to "Jianghu" to produce tube active speakers. Guan's also regrouped and launched a small number of new products. However, Ober and Spak have always been firmly in the Hi-Fi market. During the rise and fall of the Hi-Fi market, they have continuously improved their technical level, explored new business ideas, continuously expanded their production scale, and exported a large number of products overseas. Strong manufacturer of electronic tube machine. In contrast, Spark has a large production scale and a high degree of industrialization. Ober is good at absorbing foreign technologies and humanized products. In recent years, due to the increase in the number of exported products and the continuous expansion of the production scale of Oubo, the level of industrialization and quality control have been rapidly strengthened. The humanistic atmosphere of Spark products is also impressive compared with the early products. In recent years, Ober has focused its efforts on product exports. Its popularity in Europe, America and Japan has increased day by day, but its propaganda in China has been weaker. In fact, Oubo products still have a large sales volume in China, and are still leading in the same industry. Ober's product models are dazzling, among which the Reference series and Cyber ​​series have been in line with the world in quality. Today's Ober product is no longer the simple appearance and informal production level of 10 years ago, it is already a world-class product. I ca n’t think of any product that can be regarded as the representative product of Oubo. From the tenth anniversary of M100, it can be said to be a sword in ten years. This evergreen tree is the representative of Oubo ’s “simple and human†corporate culture. It also reflects the advanced design technology and fine industrial production quality of Ober today.
Shape design is refreshing The shape of the M100 has been in use for 10 years since its birth in 1994. The structure of the aluminum or stainless steel casing is attached to a wooden board on each side and the three black round transformer covers on the top are very common. The appearance process is also very general. With high-quality sound and stable quality has been selling so far. The appearance concept of the amplifier produced by Ober has been updated, and the M100 has a strong vitality without changing the dress. On the occasion of the 10th anniversary of the establishment of Opel, the M100 was reinvented and reinvented, incorporating newer technical essence on the basis of the previous "simple and human nature".
The shell of the M100's 10th anniversary is dominated by metal, and the joints of the extra-thick aluminum plate casing are completely welded, enhancing the integrity of the whole casing is solid and firm. The front panel is made of extra-thick aluminum plate with a curved upper edge and has the concept of Reference series. The power transformer and the two output transformers are lined up at the rear of the chassis, and the silver transformer cover is an integrated type to shield the three transformers. The color of the whole casing is silver and white, and a hardwood square is embedded on the transformer cover, and the Obo logo is engraved on it to show the old wooden logo. Although this all-silver appearance is somewhat monotonous, the overall color tone is very harmonious after the black and firm cover is covered. The wood block with the logo protruding from the upper part of the cover is very elegant. Overall, the appearance of the M100's 10th anniversary is very simple and stylish, yet simple and elegant.
The circuit design is classic, and the materials are used regardless of the cost. The tenth anniversary of M100 is not as simple as the upgrade of M100. From M100 to M100SE, and then to M100 Plus, there is no essential change in appearance and circuit, and M100 is an entirely new design The cost is not counted. The voltage amplification stage is changed from the SRPP circuit of the old M100 to only use a 12AT7 dual triode to use half as a common cathode for each channel; the long tail inverting stage has replaced the original 6N8P by 5687 with low internal resistance and high screen consumption In order to obtain more sufficient driving voltage; the final power amplifier still uses EL34 (6CA7) amplifier tube, which is also a super linear connection method, the difference is that the original fixed bias is abandoned and a self-sufficient bias method is adopted. This way you can get a softer and bolder sound, but at the same time the output power is slightly reduced. Therefore, the output power of the M100's 10th anniversary is 35W, which is 5W less than the original M100. However, due to the reasonable circuit design, after practical use, the driving solution of the M100's 10th anniversary has not been reduced, and the sense of speed and dynamics are better than before.
The M100's 10th anniversary cross-connect capacitor uses the most popular and expensive American Auricap capacitors. This is a rare brand on the market. At present, the world's famous machines such as Maijingtu in the United States and Air TIght in Japan all use this capacitor for coupling. The characteristic of the capacitor is that the sound is extremely clean and accurate, the sound stain is very small, the tone is neutral, the sound is transparent as a mirror, and the details are not lost. Although the old M100 has clear positioning and image formation, the outline of the sound image is not as sharp as the sword, and now the entire sound field of the M100 ’s 10th anniversary is like being washed once, the sound and image are embossed and background Quiet as the deep sea, Auricap capacitors are indispensable.
The M100's 10th anniversary power supply circuit uses "hybrid rectification", which is a hybrid rectification of transistors and tubes. The high-voltage power supply is firstly full-wave rectified by four high-speed low-internal-resistance diodes, and then buffer-adjusted by two 5AR4 rectifier tubes, which not only ensures the transient response and sound density of the machine, but also has a rich sense of air for the tube machine. Before listening to the aircraft, I saw two 5AR4s from the base, and I felt a gentle and gentle impression of the aircraft in my heart, but after the actual opening, I found that it was very different from the imagination. The sense of speed and dynamic range are similar to the crystal machine. The low-frequency bouncing force and high-frequency extension are rare in the tube machine. After understanding it, the reason was known after opening the bottom cover.
The filter circuit of the tenth anniversary of M100 is also very particular, sharing six large and small Philips capacitors. This light blue Philips capacitor has an excellent sense of music, and the choke π filter provides a thick sound basis for the machine.
On the output transformer, the machine has also been adjusted accordingly. The output transformer of M100 has been used for 10 years and has passed the test and has been recognized by users at home and abroad. This 10th anniversary machine further adjusts the local parameters according to the characteristics of the power tube to adjust the local parameters to achieve the best matching and coupling.
Choose high-quality rare tube If the output transformer is the soul of the tube machine, then the tube is the brain of the tube machine, which determines the sound characteristics of the whole machine to a large extent. Today's tube machine products are generally superior to antique tube machines in terms of acoustics, and their dynamics and analytical power are not comparable in the past, but the mellow and rich charm of the old "dancer" is rare. On the one hand, the components are relatively new, and the circuit design is more mediocre, so the sound is more bland and straightforward; on the other hand, it is also a reason for great influence, because the early high-quality pipes are rarely used and there is no bulk supply. The manufacturers are powerless and only use ordinary road cargo pipes for mass production. In fact, the boss of each electron tube manufacturer has a certain amount of antique famous tubes in his hand, but they dare not disclose it to the user, otherwise these collections may not be able to be hidden. Because famous celebrities like Telefunken, Mullard, GE, RCA, etc., once you plug it in, you can no longer pull it out.
Since it is no longer possible to find batches of antique EL34 tubes and 5AR4 tubes today, the M100's 10th anniversary had to use the 6CA7EH and 5AR4EH, which are the most reliable and purely sound American design and Russian production. However, after adjusting the output transformer, 6CA7EH also showed a pretty good sense of music. Fortunately, some batches of antique small tubes can still be found, and the batch size of the tenth anniversary machine is not very large, so the 12AT7 for voltage amplification and the 5687 used for promotion both use brand new antique tubes. These small tubes amplified at the front end also have a great influence on the sound. With these "old and new tubes", the rich and fragrant "bile taste" is very rich.
In addition, the tenth anniversary of M100 uses a potentiometer with a motor, which can be controlled by remote control. The exquisite metal remote control has the function of controlling the CD player at the same time, and can be used with the Opel CD player, which reflects the humanity of Opel.
The sound is as clean as before. The previous M100 is famous for its high analytical power, accurate image and rich bottom, but compared with the advanced tube machine, it still lacks some exquisite transparency and nobleness, and the audio-visual outline and music background are not clean enough. . The sound of this M100's tenth anniversary is like a storm, the mist and dust in the sound field have been washed away completely. The contour edges of musical instruments and vocals are clear and smooth, and playing vocals, violins and pianos present clear "images" and transparent and noble sounds. This noble, transparent and mirror-like sound with roundness and jade is similar to the sound characteristics of the French Jadis JA series. In the domestic electronic tube machine, Spark's A300B also has a similar sound. It is different from that dim and dull voice. If you use a speaker as an analogy, the tenth anniversary of the M100 is similar to Dynaudio rather than ATC.
The control power is better than that of the old M100. The output power of the 10th anniversary is 5W less than the old model, but the driving force appears stronger. The old M100 can barely promote the Voice of Beauty monitor No. 1 speaker (say it is because the listening area cannot exceed 30m2), and the nearly 50 square meters of listening area of ​​the M100's 10th anniversary in the magazine's listening room can push the Dana C2 Very calm, and compared to similar amplifiers that have been heard in the magazine's listening room, the volume of the M100's 10th anniversary can be turned higher without distortion. At a medium volume, the M100's 10th anniversary will launch the C2 bass well, playing CDs such as "Sky" and "Where is the King"? The bass dives to the end and is clean. Its low frequency is not very strong and domineering, and the following diving depth and bouncing power are good, clean and clear, good transient, excellent, no trace of muddy water. When listening to the violin, the high frequency is smooth like jade, the very high frequency extends well, and the medium volume is slightly larger and there is no rough loose or tight feeling. Play Mute's "Song of the Wanderer" and play it in full dynamic At the same time, the positioning and level are also very clear, without scattered phenomenon. It can be said that the tenth anniversary of the M100 promotes speakers such as the Dana C2 within a listening area of ​​30m2, and the driving force is not a problem.
"Bile taste" is still very strong. The tube machine still has a place in the audio field. The reason is that the tube machine is slack, rich and airy. The sound of the tube can not be replaced by the transistor machine, but in the past, the low frequency is soft, high frequency is dim, and the mid frequency is rich. The sound of is outdated today, and the excellent modern tube machine still has a good sound. The tenth anniversary of the Opel M100 is a product with excellent acoustics. Its sound characteristics are more modern, but it is still a "dummy machine". Despite its lively and dynamic sound, the loose and mellow tone is still fundamentally different from the crystal machine. It shows the empty inspiration inherent in the tube machine when it is bright and luxurious. When playing music, a vivid atmosphere is swayed in the space. Especially when playing violin and piano, the high frequency is moist and transparent, and the rich harmonic sound is like an invisible atmosphere. Penetrating from the notes. This is probably what we usually call "air feeling" or "guts"!
In terms of space, the characteristics of the M100's 10th anniversary are only introduced here. In general, the M100 ’s tenth anniversary has abandoned old-school sounds such as antique Marantz, Quad, Conrad Johnson, WE, and the style is closer to Jadis. Although the tenth anniversary of the M100 can't be compared with Jadis, it is indeed an attractive tube amplifier, and is a rare tube product in China for several years. The M100 10th Anniversary machine is priced at 6,300 yuan. At this price, you can't buy any imported brand "danji", but you can get a sound similar to the famous machine.
Related parameters:
Output power: 35W × 2 RMS 1kHz
Output impedance: 8Ω, 4Ω
Frequency response: 6Hz ～ 60kHz (-3dB 10W)
Signal to noise ratio: 90dB
Volume: 430 × 380 × 188mm (width × depth × height)
Weight: 25kg
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