Boyuu A30 2A3 Tube Singel-end Class A Integrated Amplifier
Hi-fi audio Brand New
This item have a very loud humming when it don't play music.
You can hear the humming 3 meters far away.
But some senior audiophile can accept it becuase the sound is nice when play music.
Why so loud humming? because it is AC for filament-type.
The DC for filament-type will get less humming, but the sound is not good enough, Factroy don't use DC for this version .
Usually, the new tube members are not easy to understand and accept so loud humming.
Declaration
Specification:
Power Transformer: New imported 0.35, stacked thickness of 60MM (105-60)
Output cattle core: the new imported core 0.35 thick high silicon (86-50)
Chassis: imported mirror stainless steel chassis
Aluminum alloy panel: high-grade aluminum CNC machining, anode surface treatment
Output Jack: High - grade Export Copper
Voltage amplifier tube: dawn 6N9PJ × 2
Power output tube: 2A3 × 2
Rectifier: 5Z3PAT × 1
Output power: 3.5W * 2 (triode connection)
Signal to noise ratio: 89dB
Frequency response: 30Hz - 36KHz
Output impedance: 4,8Ω
Total harmonic distortion: ≤ 1% (1kHz)
Input sensitivity: 750MV
Input impedance: 100KΩ (three input signals)
Volume (width × depth × height): 360 × 300 (with knob) × 180mm
Packing volume: 500 * 450 * 290MM
Package weight: about 19 kg
Input Power Voltage: AC100V - AC240V(60Hz/50Hz)(100V, 110V, 120V, 127V, 230V, 240V version will take 3-14 work days to order. 220V version is in stock.
