Amplificateur de puissance à Tube sous vide, Original, OPA 4A, petite Machine à Bile, oreille, hi-fi, fièvre, EL34
Features:
1: The whole machine adopts high-quality PCB welding to ensure stability and integrity
2: Use two E-type output transformers with high-quality wide-frequency response and high-quality Japanese Z11 iron cores 3: Use a toroidal power transformer specially designed for this machine
4: The front stage uses 12AU7 vacuum tube X2
The latter stage uses EL34 vacuum tube X2 for class A single-ended power amplification.
Among them, the working mode of the triode is used in the pentode EL34 circuit
Fully embodies the moist and thick personality unique to EL34
5: Input has BALANCE/RCA/Bluetooth selection
6: Headphone output can choose four-core balanced output and 6.3 head output
7: Equipped with external speaker function, start mute delay function (about 30 seconds)
8: The volume potentiometer selects the Japanese ALPS (Alps) potentiometer
9: Easy-to-install plug-in vacuum tube shield
Product parameters:
Rated output power: External speaker output: 6W+6W (4-8Ω load)
Balanced headphone output: 4000MW+4000MW (32Ω load)
Single-ended headphone output: 900MW+900MW (32Ω load)
Frequency response of the whole machine: 20Hz~50kHz (-1.5dB)
Harmonic Distortion: 0.5% (1kHz)
Signal-to-noise ratio: 89dB
Input Sensitivity: 350mV
Input Impedance: 100kΩ
Left and right output balance: <0.5dB
Use vacuum tube: 12AU7X2, EL34X2
Overall volume (WXDXH) 285mmx290mmx175mm
Net weight 13kg
Working conditions Temperature: 0°C~40°C Humidity: 20%~80%
Storage Conditions Temperature: -20°C~70°C Humidity: 20%~90%
The headphone output is a transformer output
Output Impedance: Speaker 6Ω Headphone 64Ω
Output impedance when headphones are balanced: 64Ω, 6.3 output 32Ω
Hengyang is used for vacuum tube EL34, Shuguang is used for 12AU7
Bluetooth:
Support SBC, MP3, AAC, APTX APTX-LL audio format
Support sbc, aptx, aptĂ—-llac multiple encoding and decoding methods
Channels : 2 (2.0)
Maximum Power Per Channel : NO POWER
Certification : NONE
Model Number : OPA 4A
Package : Yes
Brand Name : QUEENWAY
Origin : Mainland China