Feature
●Wide Input Voltage: Innovative circuit design supports a DC 5-20V wide input working voltage, maintaining an optimal 26V for the amplifier circuit and delivering an excellent background noise index.
●High-Quality Audio Components: Features the original TI-NE5532 op amp and a transistor expanding current circuit with 1300mA large current output transistors in Class A status for ultra-low distortion and a warm, delicate sound.
●DIY Upgradeability: Pluggable op amp socket design allows for easy upgrades to different op amps, offering DIY fun and enhanced playability for audiophiles and sound enthusiasts.
●Mini Size, High Performance: Compact and exquisite design offers great value, providing the power and sound quality to drive most headphones on the market with ease, perfect for home or office desktop audio systems.
●Strong Drive Power: Effortlessly drives high-impedance headphones including models like HD580, HD600, HD650, K701, K702, Q701, DT880, T70, T90, SR225, SR325, and RS1e.
Description
Product Highlights
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Strong headphone drive power
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Replaceable TI-NE5532 OP AMP
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Super mini size
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Innovative circuit design
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Packing List
- 1*U3 Headphone Amplifier
- 1*USB to DC Cable
- 1*6.35mm to 3.5mm Headphone Adapter
Douk Audio U3 Headphone Amplifier
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: 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: 210g / 0.68lb
Panel Introduction
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| Douk Audio U3 | Nobsound NS-08E | Douk Audio P1 | Douk Audio T3 PLUS | Douk Audio Q3 | Little Bear B4-X | |
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| Customer Reviews |
46
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294
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95
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| Price | £43.99 | — | £116.99 | £69.99 | £47.99 | — |
| Type | 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 |
| Input | RCA | 3.5mm AUX | Bluetooth 5.0 (APTX-HD) + USB + RCA | MM/MC Phono + 3.5mm AUX | PC-USB + Optical + Coaxial | 3.5mm AUX |
| Output | 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) |
| Output Power | ≥1300mW (32Ω) | ≥1100mW (32Ω) | ≥160mW (32Ω) | ≥130mW (32Ω) | ≥100mW (32Ω) | ≥450mW(32Ω) |
| Headphone Impedance | 18-600Ω | 18-600Ω | 32~300Ω | 32~300Ω | 16~200Ω | 16~300Ω |
| Frequency Response | 20-30KHz | 20-30KHz | 20Hz-20kHz(±3dB) | 20Hz-20KHZ(-1dB) | 20Hz-20KHz(±3dB) | 20-30KHz |
| SNR | ≥110DB | ≥110DB | ≥103dB | ≥100dB | ≥105dB | ≥110DB |
| Power Input | DC 5-20V | DC 6V | DC 12V | DC 12V | DC 5V | Rechargeable Battery |
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| Nobsound NS-10P | Nobsound TA-21 | Douk Audio U2 | Douk Audio L1 | Little Bear MC102 | Nobsound NS-14G PRO | |
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| Customer Reviews |
36
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71
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37
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643
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| Price | — | — | £58.00 | £54.99 | £24.35 | — |
| Type | Vacuum Tube Preamplifier | Bluetooth 5.0 Stereo Power Amplifier (200W) | 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) |
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