(as of May 28,2022 23:42:35 UTC – Details)
Strong headphone drive power
Can drive most high-impedance headphones such as: HD580/HD600/HD650/K701/K702/Q701/DT880/T70/T90/SR225/SR325/RS1e
Replaceable TI-NE5532 OP AMP
Adopting original TI-NE5532 classical op amp and transistor expanding current circuitUltra-low distortion, warm and delicate sound, full and mellowPluggable op amp socket design, convenient to upgrade different op amps
Super mini size
Mini size with exquisite appearance can be hold by one hand
Innovative circuit design
DC 5-20V wide input working voltageInnovative amplifier circuit can always work at a high voltage of 26V
Packing List 1*U3 Headphone Amplifier 1*USB to DC Cable 1*6.35mm to 3.5mm Headphone Adapter
Douk Audio U3
Audio input: stereo L/R RCAAudio output: 6.35mm headphone jack (with 6.35mm to 3.5mm adapter)Output power: ≥1300mW (32Ω)Matched headphone impedance: 18-600ΩFrequency response: 20-30KHzSignal to noise ratio: ≥110DBMax output amplitude voltage: 25VInput voltage: DC 5-20V
Dimension(W*D*H): 67*93*30mm / 2.64*3.66*1.18in Net weight: 169g / 0.37lb Package weight: 210g / 0.68lb
Digital Headphone Amplifier Vacuum Tube Headphone Amplifier Bluetooth Tube Preamp & Headphone Amplifier Phono Tube Preamp & Headphone Amplifier DAC + Headphone Amplifier Portable Vacuum Tube Headphone Amplifier
RCA 3.5mm AUX Bluetooth 5.0 (APTX-HD) + USB + RCA MM/MC Phono + 3.5mm AUX PC-USB + Optical + Coaxial 3.5mm AUX
6.35mm AUX (with 6.35mm to 3.5mm adapter) 3.5mm AUX RCA + 3.5mm AUX RCA + 3.5mm AUX (can output at the same time) RCA + 3.5mm AUX 3.5mm AUX + 2.5mm (Balanced)
≥1300mW (32Ω) ≥1100mW (32Ω) ≥160mW (32Ω) ≥130mW (32Ω) ≥100mW (32Ω) ≥450mW(32Ω)
18-600Ω 18-600Ω 32~300Ω 32~300Ω 16~200Ω 16~300Ω
20-30KHz 20-30KHz 20Hz-20kHz(±3dB) 20Hz-20KHZ(-1dB) 20Hz-20KHz(±3dB) 20-30KHz
≥110DB ≥110 dB ≥103dB ≥100dB ≥105dB ≥110DB
DC 5-20V DC 6V DC 12V DC 12V DC 5V Rechargeable Battery
Vacuum Tube Preamplifier Bluetooth 5.0 Stereo Power Amplifier (100W) USB to Toslink Digital Interface Line Level Booster 2(1)-IN-1(2)-OUT 3.5mm Audio Switch 2.1-CH Bluetooth 5.0 Power Amplifier (100W+50Wx2)
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 strong drive power, easily to drive most high-impedance headphones such as: HD580/HD600/HD650/K701/K702/Q701/DT880/T70/T90/SR225/SR325/RS1e