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Ships within 48 hours · Estimated delivery Sep 25 - Sep 30
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Description
Douk Audio U3 PRO HiFi Mini Class A Headphone AmplifierDescriptions Enhanced Compatibility: with 3. 5mm AUX stereo RCA input and 3. 5mm 6. 35mm headphone jack output, the U3 PRO is compatible with a wide range of audio sources, including MP3 players, iPods, smartphones, tablets, computers, and CD players etc. Its output can connect to various headphones, offering a versatile listening experience with support for most headphone models. Built in Voltage Boost Circuit: adopting innovative circuit design with
Descriptions
- Enhanced Compatibility: with 3.5mm AUX/stereo RCA input and 3.5mm/6.35mm headphone jack output, the U3 PRO is compatible with a wide range of audio sources, including MP3 players, iPods, smartphones, tablets, computers, and CD players etc. Its output can connect to various headphones, offering a versatile listening experience with support for most headphone models.
- Built-in Voltage Boost Circuit: adopting innovative circuit design with built-in voltage boost circuit, the amplifier circuit can always work at a high voltage of ±14V even only powered by DC 5V, and the background noise index is excellent. With wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range.
- Exceptional Output Power: for a total power output of up to 1500mW under a 32Ω load, U3 PRO can easily power headphones with any low or high impedance (18-600Ω). Working in class A status, with ultra-low distortion, the sound is warm and delicate, full and mellow with outstanding sound quality.
- Classic OP+BUF Architecture: U3 PRO adopts OP42 and BUF634, featuring a pure DC amplification circuit. Pluggable op amp socket design, OP42 can be replaced by OP17, AD797, AD843, AD847, and OPA627, convenient to upgrade different op amps and bring much DIY fun and playability for audiophiles.
- Highly Cost-Effective: mini size with exquisite appearance, 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 desktop audio system use.
Sepefications
- Audio input: stereo L/R RCA, 3.5mm AUX
- Audio output: 3.5mm/6.35mm headphone jack
- Output power: ≥1500mW (32Ω)
- Matched headphone impedance: 18-600Ω
- Max output amplitude voltage: ±14V
- Frequency response: 20-30KHz
- SNR: ≥110DB
- Input voltage: DC 5V(≥1A)
- Dimension(W*D*H): 68*92*32mm/ 2.68*3.62*1.26in
- Net weight: 164g / 0.36lb
- Package weight: 300g / 0.66lb
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Got the job done!
Size: 5 FT (2 prong plug), Color: White
This was the perfect solution. Old outlet and the single plug didn’t overly strain the wall socket. Lots of plug-ins for all our electronics and a long enough core to reach them all.
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Reviewed in the United States on November 14, 2025
★★★★★ 5
Great item!
Size: 5 FT (2 prong plug), Color: White
LOVE. Plenty of outlets, cord is long enough - works perfectly in my office.
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Reviewed in the United States on November 14, 2025
★★★★★ 5
Lots of nice features
Size: 5 FT (2 prong plug), Color: White
664Very nice. Even the slots on the sides will enable a larger than expected plug. Wish they included the screws for mounting. Didn't think it would be a big deal as I always keep the extras from projects, but it would have been a nice touch. If you do mount the power strip, it does reduce the size of the plug it will accommodate on the sides. Also wish I would have purchased the longer cord- NOT the fault of the product. Love the flat angled plug! I'm using it behind an adjustable bed frame that moves several times a night, so knowing I won't accidentally knock it out of the wall is nice. And you can easily use both wall plugs. Also very convenient to connect the USB & USB-c plugs without the bricks.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Works perfectly for what I needed
Size: 5 FT (2 prong plug), Color: White
We have an older house and I needed a 3 prong plug in our living room and this has absolutely done the job. I love that I can now plug my computer in and as a bonus, I can charge my phone if needed. The cord link is longer than I needed for the living room but worked great for a recent trip.
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Reviewed in the United States on September 20, 2025
★★★★★ 5
GOOD VALUE/GOOD PRODUCT
Size: 5 FT (2 prong plug), Color: White
FINE. HOWEVER YOU BETTER UNDERSTAND HOW MANY WATTS EACH DEVICE IS PULLING IF YOU TRY TO USE ALL 12 AC OUTLETS. GOOD VALUE
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Reviewed in the United States on May 25, 2026
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