Douk Audio & Nobsound
Make Hi-Fi Affordable
Douk Audio & Nobsound
Estabilshed in 2013, Douk Audio & Nobsound is created by a group of enthusiastic music fans and professional audio experts.
We design and make various audio equipments including amplifier, phono preamp, headphone amp, DAC, audio switch and so on.
Our aim is "Make Hi-Fi Affordable" !
New Released
Ampapa Q1 DAC | Bluetooth Headphone Amp
New Released
Douk Audio G7 Flagship Amplifier
New Released
Ampapa D1 Bluetooth Amplifier
New Released
Douk Audio P7 Phono Preamplifier
New Released
Douk Audio U2 PRO DDC
Amplifier | Bluetooth Receiver
Headphone Amp | Preamplifier
DAC | DDC
Equalizer
Audio Visual | VU Meter Series
Versatile Headphone Support
26V high voltage for clear, noise-free audio with high-impedance headphones like HD580/HD600/HD650
Class A Amplification
Delivers a warm, detailed sound, enhancing the listening experience.
Easy Upgrades for Audiophiles
Customizable sound quality with the convenience of pluggable op amps.
Compact and Cost-Effective
Small size with powerful performance, an affordable choice for audio enthusiasts.
Technical Specifications
Similar Products
 Douk Audio U3 |  Douk Audio U5 |  Douk Audio U10 |  Nobsound E6 |  Douk Audio L1 |  Douk Audio P1 |  Douk Audio Q4 | |
|---|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — | — |
Price | — | — | — | — | — | — | — |
Type | Digital Headphone Amp | Balanced Headphone Amp | Vacuum Tube Headphone Amp | Direct Heated Tube Preamp | Line Level Booster | Tube Preamp & Headphone Amp | USB Gaming DAC & Headphone Amp |
Input | stereo L/R RCA | stereo XLR ( 3-core, female) | 3.5mm AUX / Stereo RCA | standard stereo L/R RCA | 3.5mm AUX / Stereo RCA / 5-DIN | Bluetooth + RCA + PC-USB | Bluetooth/USB/Coaxial/Optical |
Output | 6.35mm headphone jack | XLR ( 4-core, female) / 4.4mm | 3.5mm / 6.35mm headphone jack | standard stereo L/R RCA | Stereo RCA / 5-DIN | RCA + 3.5mm headphone jack | RCA / 3.5mm headphone jack |
Matched headphone impedance | 18-600O | 18-600O | 18-600O | — | — | 32-300O | 16-300O |
Frequency response | 20-30KHz | 20-30KHz | 20Hz-30KHz | 20Hz-30KHz | 20Hz-20KHz ( ± 0.5dB) | 20Hz-20kHz(±3dB) | 20Hz-20KHz (±0.5dB) |
Signal to noise ratio | =110DB | =110DB | =110DB | =90DB | >80dB | 103dB | = 113dB |
Output power | =1300mW (32O) | =1400mW (32O) | =1100mW (32O) | about 6 times (15.6dB) | 20dB (Adjustable) | 160mW 32O load | 110mW @32O |
Products Recommendation
Headphone Amplifier | Feature 1 | 2-CH Bluetooth Amp |
Class A | Feature 2 | 50 watts x2 |
Mini Size | Feature 3 | PC Sound Card |
Headphone Amplifier | Feature 1 | Subwoofer Amplifier |
Class A | Feature 2 | 100 watts |
Mini Size | Feature 3 | Mini Size |
Headphone Amplifier | Feature 1 | Headphone Amplifier |
Class A | Feature 2 | MM Phono Preamp |
Mini Size | Feature 3 | Vacuum Tube |
Headphone Amplifier | Feature 1 | Bluetooth EQ Preamp |
Class A | Feature 2 | 5 Band Equalizer |
Mini Size | Feature 3 | VU Meter |
Versatile Headphone Support
26V high voltage for clear, noise-free audio with high-impedance headphones like HD580/HD600/HD650
Class A Amplification
Delivers a warm, detailed sound, enhancing the listening experience.
Easy Upgrades for Audiophiles
Customizable sound quality with the convenience of pluggable op amps.
Compact and Cost-Effective
Small size with powerful performance, an affordable choice for audio enthusiasts.
1*U3 Headphone Amplifier; 1*USB to DC Cable; 1*6.35mm to 3.5mm Headphone Adapter
Technical Specifications
| Audio input | stereo L/R RCA |
|---|---|
| Audio output | 6.35mm headphone jack (with 6.35mm to 3.5mm adapter) |
| Output power | =1300mW (32O) |
| Matched headphone impedance | 18-600O |
| 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 |
Similar Products
Douk Audio U3 | Douk Audio U5 | Douk Audio U10 | Nobsound E6 | Douk Audio L1 | Douk Audio P1 | Douk Audio Q4 |
|---|---|---|---|---|---|---|
| Customer Reviews | ||||||
| — | — | — | — | — | — | — |
| Price | ||||||
| — | — | — | — | — | — | — |
| Type | ||||||
| Digital Headphone Amp | Balanced Headphone Amp | Vacuum Tube Headphone Amp | Direct Heated Tube Preamp | Line Level Booster | Tube Preamp & Headphone Amp | USB Gaming DAC & Headphone Amp |
| Input | ||||||
| stereo L/R RCA | stereo XLR ( 3-core, female) | 3.5mm AUX / Stereo RCA | standard stereo L/R RCA | 3.5mm AUX / Stereo RCA / 5-DIN | Bluetooth + RCA + PC-USB | Bluetooth/USB/Coaxial/Optical |
| Output | ||||||
| 6.35mm headphone jack | XLR ( 4-core, female) / 4.4mm | 3.5mm / 6.35mm headphone jack | standard stereo L/R RCA | Stereo RCA / 5-DIN | RCA + 3.5mm headphone jack | RCA / 3.5mm headphone jack |
| Matched headphone impedance | ||||||
| 18-600O | 18-600O | 18-600O | — | — | 32-300O | 16-300O |
| Frequency response | ||||||
| 20-30KHz | 20-30KHz | 20Hz-30KHz | 20Hz-30KHz | 20Hz-20KHz ( ± 0.5dB) | 20Hz-20kHz(±3dB) | 20Hz-20KHz (±0.5dB) |
| Signal to noise ratio | ||||||
| =110DB | =110DB | =110DB | =90DB | >80dB | 103dB | = 113dB |
| Output power | ||||||
| =1300mW (32O) | =1400mW (32O) | =1100mW (32O) | about 6 times (15.6dB) | 20dB (Adjustable) | 160mW 32O load | 110mW @32O |
Products Recommendation
Douk Audio U3
Feature 1
Headphone Amplifier
Feature 2
Class A
Feature 3
Mini Size
Nobsound NS-01G PRO
Feature 1
2-CH Bluetooth Amp
Feature 2
50 watts x2
Feature 3
PC Sound Card
Nobsound NS-03G SUB
Feature 1
Subwoofer Amplifier
Feature 2
100 watts
Feature 3
Mini Size
Douk Audio T4 PRO
Feature 1
Headphone Amplifier
Feature 2
MM Phono Preamp
Feature 3
Vacuum Tube
Douk Audio EQ5 PRO
Feature 1
Bluetooth EQ Preamp
Feature 2
5 Band Equalizer
Feature 3
VU Meter
Douk Audio & Nobsound
Make Hi-Fi Affordable
Douk Audio & Nobsound
Estabilshed in 2013, Douk Audio & Nobsound is created by a group of enthusiastic music fans and professional audio experts.
We design and make various audio equipments including amplifier, phono preamp, headphone amp, DAC, audio switch and so on.
Our aim is "Make Hi-Fi Affordable" !
New Released
Ampapa Q1 DAC | Bluetooth Headphone Amp
New Released
Douk Audio G7 Flagship Amplifier
New Released
Ampapa D1 Bluetooth Amplifier
New Released
Douk Audio P7 Phono Preamplifier
New Released
Douk Audio U2 PRO DDC
Amplifier | Bluetooth Receiver
Headphone Amp | Preamplifier
DAC | DDC
Equalizer
Audio Visual | VU Meter Series