Product Details:
1. The power transformer made of Z11 iron core with high-end special technology and special materials.
2. The main circuit of the front stage 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 pass-through 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 indicating meter function.
11. The sound is soft, pure and smooth, suitable for enjoying various types of music.
Specifications:
Main amplifier circuit:
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: 12AX7*2, 6KE8*6, 12DT5*1, 17BE3*1
Power supply voltage: ~115/230V+5% (50HZ)
PHONO specifications:
MC: 72dB MM: 50dB 0.08% (1kHz)
RIAA bandwidth: 0.25dB 20Hz to 20KHZ
MM: 6mV MC: 0.5mV
MC: about 100Ω MM: About 50KΩ
MC:78dB MM:85dB
Package List:
1 × MUZISHARE R90 Tube Preamplifier
1 × Remote control(Excluding battery)
