This amplifier utilizes imported top-tier audiophile-grade components, including Japanese ALPS potentiometers, Japanese Nikon filter capacitors, German WIMA capacitors, German Siemens capacitors, and imported ceramic inductors, delivering unprecedentedly pure and warm sound quality.
The flagship version comes equipped with a set of replica original-matched tubes: four 12AT7s, three 12AX7s, and four carefully selected KT88s, perfectly reproducing the signature warm tone of classic retro tube amplifiers.
It features a dedicated output transformer and purification module, supporting automatic tube bias adjustment, eliminating the need for manual calibration and ensuring stable and consistent sound quality even after long-term use.
The included all-aluminum alloy remote control allows for precise remote volume adjustment, allowing you to easily adjust to your ideal volume without getting up.
The bright gold metal panel paired with the classic black transformer cover combines retro luxury with HiFi quality, making it the perfect complement to any living room audio system.
For decades, the McIntosh MC275 has been the holy grail for audiophiles worldwide, seeking the most iconic warm, rich, and delicate tube sound. Our sixth-generation flagship amplifier, the ORSEFON MC275, is a meticulously crafted replica of this legendary classic, designed for listeners who refuse to compromise on sound quality.
Every component of this amplifier is hand-assembled and tested by experienced audio technicians to ensure that every unit delivers the renowned silky midrange, tight bass, and clear treble of tube amplifiers. It supports RCA inputs for convenient use as an integrated amplifier, and also supports XLR balanced inputs for connection to your high-end preamplifier for professional pure power amplifier use.
With its timelessly classic dark premium metal chassis and iconic gold anodized front panel, this amplifier will become the heart of your home entertainment system, creating a pure and nostalgic high-fidelity atmosphere for your everyday music listening.
1: KT88x4 vacuum tube post-propulsion, high pressure resistance, full and moist sound
2: 12AX7Ax3 vacuum tube high gain tube, which is 100 times the gain factor of ordinary 6N3, 6N8, etc.
3: 12AT7Ax4 vacuum tube is better, the sound thickness, density, dynamics and sound field are better than other tubes
Product parameters:
Model: MC275
Output resistance group: 4 ohms/8 ohms/16 ohms
Output power: Stereo mono 75W/mono bridge method 150W
Bile tube model:
4PCS/KT88 tube
3PCS/12AX7 tube
4PCS/12AT7 tube
Frequency Response: 10Hz-50kHz
Harmonic Distortion: 0.5%
Signal-to-noise ratio: “98dB
Input Sensitivity: 400mV
Fuse Specifications: Fast Dissolving 250V4A / Size 6×30 or 6×32
Power supply voltage: 220V/110V can be adjusted manually
Overall size: 400*300*220m (length*width*height)
Machine net weight: 28KG
Product use: can be used as power amplifier or input RCA audio line as a combined power amplifier XLR balanced input can only be used as power amplifier, you need to add pre amplifier
Basic version:
1: A total of 3 transformers (1 power supply voltage transformer and 2 output transformers)
Product Usage: It can be used as a power amplifier or as an integrated amplifier by inputting RCA audio cable; XLR balanced input can only be used as a power amplifier, and needs to pre amplifier
The sixth generation flagship version has a comprehensive upgrade in its overall appearance, with the volume adjustment button placed in the front terminal and the back terminal for more versatile use. It has added an additional set of inputs and added a black technology purification system. For the first time, it has added customized 1:1 bile ducts, upgraded circuit boards and components. After user feedback and continuous trial and error, it has spared no cost to develop a sound that can achieve over 90% of the original version, constantly breaking new definitions. The strongest version has been launched
The customized replica KT88 high-power RF transistor for the flagship version is a right characteristic transistor. Unlike left characteristic power transistors such as 300B845, the gate operates at positive voltage and has gate current. The left characteristic power transistor operates at a negative voltage with no gate current and is relatively easy to design. However, the right characteristic electronic transistor reduces input impedance interference due to the presence of gate current, making it easy to use high-power driving. The left characteristic transistor only needs voltage driving. If the customized KT88 electronic tube MC-275 needs to output a maximum undistorted Class A power of 75 watts, it requires a certain amount of power to drive. Generally, it uses a transistor or a high transconductance collector four stage transistor, and the pentade is connected to a transistor for driving. It is also useful to drive a transformer. The customized bladder design is just enough to overcome this noise and noise, so as to better and stably play the taste of the bladder.
The KT88 series beam power quadrupole has an anode limit dissipation power of 42W. In audio amplifiers, when two vacuum tubes are used as AB1 push-pull outputs, a power of 75W can be obtained, and KT88-T can also be used in electronic voltage stabilizing circuits. KT88T is similar to 6550 and can be used interchangeably.
Filament heating
UH ——6.3V
IH ——1.6 A
Ultimate rating
Anode voltage -800V
Second gate voltage -600 V
First gate voltage -200V
Anode dissipation power -42 W
Second gate dissipation power -8 W
Anode plus second gate dissipation power -46W
Cathode current -230 mA
First gate resistance
At self bias
Pa+Pg2 ≤ 35W0.47 M Ω
Pa+Pg2>35W0.27 M Ω
At fixed bias, Pa+Pg2 ≤ 35W 0.22 M Ω
Pa+Pg2>35W 0.10 M Ω
Interpole capacitance
Tetrode connection method
Input capacitance -169.3PF
The Soul of Transformer and Machine
The sixth generation flagship version basically adds a purification module system in the fifth generation, and everyone knows that transformers are one of the most important parts of the bile machine. The winding method and material of transformers are of utmost importance. The reason why the mcintosh bile machine stands out for generations is its unique multi wire parallel winding transformer technology; The replica mcintosh 275 has three combinations, one for the power supply and two for the output. A team of experienced Taiwanese enthusiasts has spared no effort in using up to sixteen units (the original MCintosh 275 is a twelve house) UP0C0 (single hydrogen free copper) for grouping and winding. The purity of the single copper free product can reach 99.99, reaching a high level. After each cow is wrapped, it will undergo freezing treatment, After low-temperature treatment of the metal, the low-temperature treatment of the conductor can disrupt the crystal arrangement, recombine molecules, and macroscopically make the metal harder. This type of transformer has the advantages of good broadband response and extremely low distortion, which is similar to the effect of a MCintosh transformer. Due to the high cost of materials, which weigh up to 25KG, three transformers account for two-thirds of the weight. With such meticulous material selection, winding, and special freezing treatment, the power of the stereo can reach 75W on one side, and 150W on a single channel in series, equivalent to 800W of a stone machine. If the huge thrust is strong and stylish, but still retains a smooth texture of a vacuum tube machine, it has an open and wide sound field, and listening to large-scale orchestral music is particularly exciting. You can easily feel the distinct layers of voice, the undulating dynamics in the music, the thick and full sound base, and the rich and strong low-frequency, making the music full of power and vitality
Flagship version with purification module output transformer
The sixth generation flagship version upgraded the purification transformer and added a purification system while maintaining sufficient power, creating a new frequency conversion mode based on the output frequency of 400Hz (8 times the frequency). The frequency is changed once in each cycle of the output AC voltage, such as the first cycle being 50Hz, the second cycle being 120Hz, and the next cycle returning to 50Hz… This increases the originally limited number of switchable frequencies to 20, And move the frequency switching time point from the beginning of a waveform cycle to the midpoint of the cycle. The change in switching time point is effective in reducing transformer electromagnetic leakage and humming
