Condition:New
Type:Logic ICs
Model Number:211
There is a common understanding in the audiophile industry that single-ended machine power amplifier tubes are not 845, 211, 300b, and 2A3 can not produce good sound, but these tubes are also very difficult to produce good sound. 845 is not good to drive! 2A3 is good to drive but the power is too small, 300B is in the middle of the range but it is still very difficult to drive some sensitive speakers. . . Only 211, good drive, relatively large power, but it also has big shortcomings, high internal resistance, linearity is the same as 2A3,845,300B, power is more than 300B casually, there is a more fatal shortcoming. . . The output transformer has high impedance and low current. Generally, a relatively large window iron core can be used to complete the wiring of the output transformer, but the large window iron core also brings poor secondary distribution to the output transformer. , Looking at all domestic single-ended single-tube 211 machines, basically they can’t produce good sound. Basically all use large loop feedback. For 211 machines with direct heat and low distortion, it is very unwise to use large loop feedback. Means, but also purely helpless, the details, air, freshness, etc. are all gone. In the face of the above difficulties, we adopt the method of maximizing strengths and avoiding weaknesses to make 211 perfect. . . And the internal resistance of the tube is reduced! The distortion is unchanged! Power increase! Still good drive. . . . . The sound performance still has the simplicity of 2A3, and the extravagance and delicateness of 300B.
Machine parameters:
Electron tube: linlaitube golden feet 211*4 (2pcs on each side)
5AR4*2 (1 Dawn for each of the left and right channels) 6H8C (6SN7) Soviet otk*2 (1 for each of the left and right channels)
US GE5687*2 (1 for each of the left and right channels)
Power: 24W+24W
Input impedance: 470k
Output impedance: 0-4-8 (16 ohms can be customized)
Function: You can switch the combined state of the left and right channel split single-ended parallel machine, and you can also switch the left and right channel split pure rear stage
Weight: 25Kg for one channel (50KG for left and right channels)
Size: 490MM (width) * 280 (depth) * 240 (including the height of the tube)
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