Package express, send massive non-destructive resources. Ledi directly engraved the Swiss FM255MK2R front stage; completely cracked the original machine module (19510A+19200 module), and strictly followed the original machine test and production process. The components are strictly aging, tested, and paired; the German original SEDLBAUER ring cow is used; each module is paired with the module and the transistor is precisely matched before installation. All working points refer to the original machine; before leaving the factory, it will be burned for 100 hours; each unit is independently numbered, The module parameter archive is convenient for future maintenance. The sound field is open, the details are rich, the sound is loose and natural, and full of charm. 2 groups of balanced, 3 groups of single-ended input, 1 group of balanced output, 1 group of single-ended recording input and output. Adjustable left and right channel balance, phase reversal, standard remote control.
Please add comments for Ledi 255 pre-levelPrestige Public Account "Oak Leaf Talk"View
statement:
1: "Oak Leaf Talk" Equipment Reviews is a non-profit evaluation, designed to let fans understand the characteristics, advantages and disadvantages of the equipment.
2: The copyright of the test tracks belongs to the record company. The online disk files are only for testing, comparison, and communication, and cannot be used for commercial purposes. Please delete them within 24 hours after downloading. If you like test tracks, please buy genuine records.
Please download the original test music file and test recording file directly from the following link
Baidu network disk link: https://pan.baidu.com/s/1Z_mzDfjbKrErB2YLe3rUIg password: vx31
This recording file:Pre-stageIn the directory, the name isFM255The first 4 files
Recording on the front stage of Ledi 255MK2R,Adjust the volume to 10 o''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''clock (about -30dB)
Some user comments
Re-engraving FM255+711 experience
Established physical store, credit guarantee
This shop is: Headphone Everyone Altar Certified Merchants, Industry Members
Our shop is Ledi Audio: the total generation of Beijing-Tianjin-Hebei
Ledi Audio Power of Attorney
note:Because the pre-stage gain is high, you must adjust the volume after the warm-up is completed and the blue indicator light is always on.
The golden front panel, the blue indicator light flashes in the warm-up phase after power-on, and is always on after the warm-up is completed
The front panel of the original machine, for comparison only
5 groups of input switching buttons, 4 function buttons (recording monitoring, monaural monitoring, phase reversal, attenuation 20dB)
Channel balance potentiometer, volume knob, switch button, status indicator, standard remote control
Backplane: 2 groups of balanced 3 groups of single-ended inputs, 1 group of balanced outputs, recording input and output terminals, fixed power cord
The internal structure, the most technical things are in 4 modules (each module is numbered, strictly tested and matched)
German original SEDLBAUER ring cow
Nichicon 680μF capacitors are used as the main filter (Gavin and FM original machines all use multiple small-capacity capacitors, which can ensure fast charging and discharging speed, but alsolowInternal resistance)
The input part uses a 19510A module and adopts a pure class A fully balanced circuit structure. In addition to matching the sound source signal well, it can also eliminate clutter interference
The output part uses a 19200 module, which is also a fully balanced circuit structure, with no negative feedback design, and excellent driving capability
2 groups of micro switches, adjustable gain, factory default lowest gain
The rare IMAGINE 470μF coupling capacitor Two types of Nichicon coupling capacitors
The same as the original machine adopts precision matched triode
Japan ALPS remote control volume potentiometer, ALPS balance potentiometer, Japan Takamizawa TAKAMISAWA relay
5 (the other is the power switch) long-life Japanese ALPS key switch
Output terminal of Takamizawa TAKAMISAWA relay
Strictly follow the original machine testing, production links, and professional instrument testing
The measured frequency response curve of professional AP tester (input voltage 2V, output voltage 8V), human hearing range 20-20KHz range is completely flat
Professional AP tester, the test results under the same test conditions (2V input level, 1KHz sine wave): The distortion of some re-engraved FM is 40 times that of the flute!The waveform of Ledi''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s re-engraved FM is symmetrical and neat (the result of strict matching of components), consistent with the original
FM official test waveform
Some re-engraved FM waveforms are asymmetrical and chaotic (the result of unmatched components)
About FM Acoustics:
Switzerland''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s FM Acoustics (hereinafter referred to as FM) may be the most expensive HI-END brand in the world at present, even experienced veterans may not have heard of it FM audio equipment, because the price of this guy is really expensive. A senior player once said this memorable sentence: “If the prices of Krell, Cello and other equipment are too expensive, then the price of FM is simply unreasonable! ”How much is FM''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s fever equipment“harmfulness”, the sub-flagship stereo rear stage 711MKII is priced at 630,000, and the second flagship 266MKII is priced at 590,000. . .
FM was originally a Swiss manufacturer specializing in broadcasting professional audio products. After entering the HI-END field, it has done nothing but the spirit of making Swiss watches. All products are precision-manufactured by hand, and audio equipment is treated as a work of art. All FM research and development work and product production are carried out in the factory, which is the opposite of the fashionable management method of modern industry. All components purchased by FM are carried out inward rather than outward, because FM believes that only every detail of each link is under continuous and strict quality control measures, and accuracy and quality can be obtained. The real guarantee.
In the entire assembly process, each component is tested before assembly. After the component is installed, each module and circuit board is inspected, tested and adjusted again. Calibration; when assembling the equipment, the test and adjustment are repeated continuously at each stage. After the equipment is completed, the whole machine is tested, adjusted, and “burned”(Burn-in)And passed the seismic test. Because the production of FM equipment consumes a lot of manpower and material resources, FM insists on manual testing in a place where labor is extremely expensive, so the price is much more expensive than ordinary equipment.
Product introduction:
Le Flute is a replica of Swiss FM255, the original machine is about 400,000 yuan, the sound is real and natural, as for the beautiful descriptions.
In the input part, the 19510A module is used, and the pure Class A fully balanced circuit structure is adopted. In addition to matching the sound source signal well, it can also eliminate clutter interference.
In the output part, 19200 modules are used, which is also a fully balanced circuit structure, with no negative feedback design, and excellent driving capability.
This machine is a 1:1 replica of the original machine, the German original SEDLBAUER ring cow, we have purchased a batch of transistors from Germany for pairing, and each machine transistor uses a transistor after aging Test and pairing of graphs and vision instruments, each group of modules is actually adjusted on the machine and the modules are paired. All working points refer to the original machine. After two years of preparations for a large number of tests, I finally dared to launch it on the market. Then it is given to the factory, and each unit is individually numbered and the module parameters are archived for future maintenance.
Product Features:
1: 2 groups of balance (1 is the Japanese standard line sequence, 2 is the American standard line sequence), 3 groups of single-ended input, 1 group of balanced output, 1 group of single-ended recording input and output.
2: Faithful to the original machine''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s left and right channel balance adjustment, phase inversion, monaural monitoring, recording channel, attenuation 20dB and other functions.
3: Adjustable gain.
4: Standard remote control.
technical parameter:
Frequency response range: 0.5HZ-150KHZ(+0.-3DB)
Total harmonic distortion: 0.003% at 3V output(20HZ-20KHZ)
Signal to noise ratio: 95dB
Dynamic range: 115dB
Channel separation: 98dB(20HZ-20KHZ)
Output voltage 18.6V/10K(XLR)
Size: 450*265*70mm=width*depth*height
Weight: 7 kg
About after-sales service: In the case of selfless dismantling and misoperation, the whole machine is guaranteed for one year free of charge; only the material fee will be charged after one year (the buyer is required to bear the round-trip freight).