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Douk Audio U3 Mini Pure Class A Amplificador de fone de ouvido HiFi Ultra-compacto Home Desktop Amplificador estéreo para HD580/HD600/HD650 Fones de ouvido

Douk Audio U3 Mini Pure Class A Amplificador de fone de ouvido HiFi Ultra-compacto Home Desktop Amplificador estéreo para HD580/HD600/HD650 Fones de ouvido

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Specifications

Brand Name
Douk Audio
Output Type
LINE OUT (AUDIO OUT)
Built-in Battery
No
Recommended Headphone Maximum Impedance
501 - 600 Ohm
Input Type
RCA
Origin
Mainland China
High-concerned chemical
None
DSD (Direct Stream Digital)
No
Body Material
Metal
Channels
2 (2.0)
Operational Amplifier Chips Model
NE5532
Bluetooth
No
Type
Mini Amplifier
Model Number
U3
Output Voltage
1300mW
Package
YES
Certification
CE

Product Description

Features
  • Adopting innovative circuit design, DC 5-20V wide input working voltage, the amplifier circuit can always work at a high voltage of 26V, and the background noise index is excellent. With wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range.

  • Adopting original TI-NE5532 classical op amp and transistor expanding current circuit, using 1300mA large current output transistor working in class A status, with ultra-low distortion, and the sound is warm and delicate, full and mellow.

  • Pluggable op amp socket design, convenient to upgrade different op amps and bring much DIY fun and playability for audiophiles. Smooth and mellow sound, suitable for listening to vocals or string music, classic or pop music, and even with unique charm when playing rock.

  • Mini size with exquisite appearance and most cost-effective, brings big surprise for all audiophiles, easily to drive most headphones in the market, providing larger power, better sound field and details, very suitable for home/office desltop audio system use.

  • With stong drive power, easily to drive most high-impedance headphones such as:

HD580/HD600/HD650
K701/K702/Q701
DT880/T70/T90
SR225/SR325/RS1e

Parameters:
  • Audio input: stereo L/R RCA

  • Audio output: 6.35mm headphone jack (with 6.35mm to 3.5mm adapter)

  • Output power: ≥1300mW (32Ω)

  • Matched headphone impedance: 18-600Ω

  • Frequency response: 20-30KHz

  • Signal to noise ratio: ≥110DB

  • Max output amplitude voltage: 26V

  • Input voltage: DC 5-20V

  • Dimension(W*D*H): 67*93*30mm / 2.64*3.66*1.18in

  • Net weight: 169g / 0.37lb

  • Package weight: 400g / 0.88lb


Packing List
  • 1*U3 Headphone Amplifier

  • 1*DC 5V Power Adapter

  • 1*6.35mm to 3.5mm Headphone Adapter



Pros & Cons

Pros

  • Classe A puro, baixa ruído, alta voltagem 26V.
  • Compatível HD600/650, resposta transitória excelente.
  • Compacto desktop, frequência ampla.
  • Saída 1300mW potente.

Cons

  • Sem Bluetooth ou bateria.
  • Impedância alta recomendada.
  • Sem DSD.
  • Alimentação externa necessária.

Common Questions

Qual o material do amplificador Douk Audio U3?

Corpo metal, chips NE5532, classe A puro.

Qual impedância de fones compatível?

Recomendado 501-600 Ohm, para HD580/600/650.

Entradas e saídas disponíveis?

Input RCA, output LINE OUT, 2 canais estéreo.

Como usar no desktop HiFi?

Alimentação DC 5-20V, ultra-compacto para home.

Qual potência e envio?

1300mW, pacote CE, envio China.

Product information last updated on March 25, 2026