MUZISHARE R90 Preamplifier Power Amplifier tube Preamplifier Frequency Adjust MM/MC & Balance Input
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Features of this machine
1. The power transformer made of Z11 iron core with high-end special technology and special materials.
2. The front-stage main circuit uses two 12AX7 vacuum tubes and four 6KE8 vacuum tubes.
3. The phono circuit uses two 6KE8 vacuum tubes plus RIAA circuit to realize MC/MM function
4. The high-voltage power supply uses a 17BE3 vacuum tube as tube rectification and a 12DT5 vacuum tube as a tube voltage stabilization circuit
5. Fixed high and low frequency point boost selection function, with a direct selection switch
6. Six groups of signal input (MC-H, MC-L, MM, CD, AUX, BALANCE)
7. This machine has specially added two groups of RCA output and one group of balanced output function
8. Power-on high voltage delay and mute delay function (about 30 seconds)
9. Select Japanese ALPS high-end potentiometer
10. Peripheral output level meter function
11. The sound is soft, pure and smooth, suitable for enjoying various types of music
Technical parameters
Main amplifier circuit specifications
Gain: 16dB
Harmonic distortion: 1% (1KHZ)
Frequency response: 15Hz~30KHz (-1.5dB)
Input sensitivity: 180mV
Input impedance: 100KΩ
Output impedance: 5KΩ
Signal-to-noise ratio :95dB
Left and right output balance: <0.5db
Power consumption: 65W
Net weight: 13KG
Vacuum tubes used: 12AX7x2, 6KE8x6, 12DT5x1, 17BE3x1
Power supply voltage: ~115/230V+5%(50HZ)
PHONO specifications
Gain: MM:50dB MC:720B
Harmonic distortion: 0.08%(1KHZ)
Frequency response: RIAA bandwidth: 0.25dB 20Hz to 20KHZ
Input sensitivity: MM:6mV MC:0.5mV
Input impedance: MC:100Ω MM: 50KΩ
Signal to noise ratio: MC:780B MM:85dB