Douk Audio U3 Mini Pure Class A Headphone Amplifier HiFi Ultra-compact Home Desktop Stereo Amp for HD580/HD600/HD650 Headsets
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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
- DSD (Direct Stream Digital)
- No
- Body Material
- Metal
- Channels
- 2 (2.0)
- Output Power
- 1300mW
- Operational Amplifier Chips Model
- NE5532
- Bluetooth
- No
- Type
- Mini Amplifier
- Model Number
- U3
- Package
- YES
- Certification
- CE
- Choice
- yes
Product Description
Not inlcude power adapter, recommend to use original high-quality power adapter above 5W.
For example: the current should be above 1A if use DC 5V while need above 0.5A if use DC 12V power adapter.
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/HD650K701/K702/Q701DT880/T70/T90SR225/SR325/RS1e
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: 25V
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: 310g / 0.68lb
1*U3 Headphone Amplifier
1*USB to DC Cable
1*6.35mm to 3.5mm Headphone Adapter
Pros & Cons
Pros
- Pure Class A circuit design delivers warm, detailed HiFi stereo audio performance
- Ultra-compact desktop form factor saves space on home audio setups
- Durable metal body for long-term daily use
- Optimized for popular high-impedance audiophile headsets like the HD580/HD600/HD650
Cons
- No power adapter is included, requiring an additional purchase of a compatible DC 5-20V adapter
- No Bluetooth connectivity, limited to wired RCA line input only
- No built-in battery, so it must be powered via a constant DC connection
- Only supports 2.0 stereo output, with no surround sound options
Common Questions
What material is the body of this headphone amplifier made from?
The amplifier has a durable metal body construction for long-lasting use.
Which headsets is this amplifier compatible with?
It is specifically designed for HD580, HD600, and HD650 headsets, with a recommended maximum headphone impedance of 501-600 Ohms.
What input types does this amplifier support?
This amplifier only supports RCA line input, and does not include Bluetooth connectivity.
What is the maximum output power of this headphone amplifier?
The maximum output power is 1300mW, making it suitable for driving high-impedance audiophile headphones.
What accessories are included with this amplifier, and where will it ship from?
This item ships from Mainland China, and the package does not include a power adapter (a compatible 5W+ DC adapter is required for use).
Product information last updated on March 29, 2026