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 amplification for high-fidelity sound with HD600/HD650.
- Wide 5-20V DC input flexibility.
- Compact metal build for desktop use, 1300mW power.
- NE5532 chips for clean stereo output.
Cons
- No power adapter included, requires separate purchase.
- No Bluetooth or battery, wired only.
- Limited to headphones up to 600 Ohm.
- RCA input only, no USB/digital.
Common Questions
What material and chips in Douk Audio U3 headphone amp?
Metal body, NE5532 operational amplifier chips, pure Class A design.
What size and power output for this mini amp?
Ultra-compact desktop size, 1300mW output power, 2.0 channels.
Compatible headphones and inputs for U3 amp?
For 501-600 Ohm headphones like HD580/HD600/HD650; RCA input, LINE OUT.
Usage: power supply for Douk Audio U3?
DC 5-20V wide input (recommend 5W+ adapter, not included); no Bluetooth/battery.
Shipping for this HiFi amp from Mainland China?
Mainland China, CE certified, 7-20 days; package yes.
Product information last updated on March 29, 2026