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Douk Audio Manuals & User Guides

Douk Audio, often known as Nobsound, manufactures affordable Hi-Fi audio components including vacuum tube amplifiers, DACs, preamps, and spectrum visualizers for desktop and home audio setups.

Tip: include the full model number printed on your Douk Audio label for the best match.

Douk Audio Support

Official site: https://doukaudio.com
General support: https://doukaudio.com/pages/contact-us
Warranty & registration: Warranty info
Support phone: +86-17704028602
Support email: nobsound@doukaudio.com
Contact form: Contact manufacturer support

Douk Audio manuals

Latest manuals from manuals+ curated for this brand.

DOUK AUDIO VU102 Amplifier and Speaker Selector VU Meter User Manual

November 19, 2023

DOUK AUDIO VU102 Amplifier and Speaker Selector VU Meter User Manual Warm tips USB power only supports DC 5V single voltage and a current of at least 1A; when the…

DOUK AUDIO Bluetooth Amplifier USB Music Player User Manual

November 18, 2023

DOUK AUDIO Bluetooth Amplifier USB Music Player User Manual How to use Connect the speakers to the output of amplifier. Wired input: Connect the audio source to the RCA input,…

DOUK AUDIO A1 PLUS Valve Tube Preamp User Manual

November 15, 2023

DOUK AUDIO A1 PLUS Valve Tube Preamp PANEL 13 PLUS front and back panel Power switch/Volume knob (Anti-clockwise rotate to off/Vol-; Clockwise rotate to on/Vol+) Headphone output PHONO GND interface…

DOUK AUDIO M-504C P6 HiFi Bluetooth Valve Tube Preamp Stereo Audio Amplifier Instruction Manual

November 15, 2023

DOUK AUDIO M-504C P6 HiFi Bluetooth Valve Tube Preamp Stereo Audio Amplifier Product Information The product features a front and rear panel with various interfaces and controls. Product Using Instructions…

DOUK AUDIO STB-02 LP Vinyl Turntable Disc Stabilizer Record Weight Instructions

November 15, 2023

DOUK AUDIO STB-02 LP Vinyl Turntable Disc Stabilizer Record Weight Instructions Introduction Ergonomic shape provides easy accident free handling, Precision fabrication and exquisite finish makes it exceptionally durable Reduces…

DOUK AUDIO M8 Bluetooth 5.0 Valve Tube Power Amplifier Instruction Manual

November 15, 2023

DOUK AUDIO M8 Bluetooth 5.0 Valve Tube Power Amplifier Product Information Specifications: Audio input: Bluetooth / stereo RCA / 3.5mm AUX Audio output: banana speaker jacks Amplifier Chip: TPA3116 Rated…

DOUK AUDIO L1 Mini Stereo Line Level Booster Amplifier Audio Preamp User Manual

November 11, 2023

MAKE HI-FI AFFORDABLE MANUAL Introduction Douk Audio L1 is a stereo amplifier with built-in voltage boost and amplification circuit, designed to boost the output of virtually any line level…

DOUK AUDIO NS-01G PRO Mini Digital Power Amplifier Bluetooth Hifi Stereo Amplifier User Manual

November 11, 2023

MAKE HI-FI AFFORDABLE MANUAL Introduction NS-01G PRO / NS-10G / NS-10G PRO / NS-20G mini Bluetooth digital amplifiers are designed by Nobsound, with multiple audio inputs such as Bluetooth, 3.5mm…

DOUK AUDIO A1 U3 Mini Class A Headphone Amplifier Instruction Manual

November 10, 2023

DOUK AUDIO A1 U3 Mini Class A Headphone Amplifier Features Adopting an innovative circuit design, DC 5-20V wide input working voltage, the amplifier circuit can always work at a high…

DOUK AUDIO KN102 Make Hi-Fi Affordable Instruction Manual

November 10, 2023

DOUK AUDIO KN102 Makes Hi-Fi Affordable Introduction KN 102 is a 2-way passive XLR splitter. II supports 1 XLR input and 2 outputs or 2 XLR input and 1 output…

DOUK AUDIO M8 Bluetooth 5.0 Tube Amplifier: User Guide & Specifications

User Manual

Comprehensive guide to the DOUK AUDIO M8 Bluetooth 5.0 Tube Amplifier, featuring 50W x 2 output, TPA3116 chip, and multiple input options. Includes setup instructions, warm tips, technical parameters, and…

Douk Audio T8PRO 7-Band EQ Tube Preamp Equalizer User Manual

User Manual

User manual for the Douk Audio T8PRO, a 7-band EQ tube preamp equalizer featuring XLR balanced inputs/outputs. Details features, technical specifications, operation, safety, and troubleshooting.

DOUK AUDIO U2/U2 Pro USB to Coaxial/Optical Converter User Manual

User Manual

Comprehensive user manual for the DOUK AUDIO U2 and U2 Pro Mini XMOS USB to Coaxial/Optical Converters, detailing driver installation, audio output setup, DSD music playback with Foobar2000, and system…

DOUK AUDIO GE JAN 5654W Vacuum Tubes: Matched Pair for Hi-Fi Audio

Product Overview

DOUK AUDIO offers matched pairs of GE JAN 5654W vacuum tubes, essential for audio amplifier upgrades. Learn about correct tube substitution and the benefits of these vintage US-made, low-noise 7-pin…

Nobsound NS-08E & Douk Audio U10 Mini Tube Headphone Amplifiers User Manual

manual

Comprehensive user manual for Nobsound NS-08E and Douk Audio U10 mini tube headphone amplifiers, detailing features, specifications, and usage instructions for Hi-Fi audio enthusiasts.

Douk Audio P6 HiFi Bluetooth Valve Tube Preamp User Manual

User Manual

Comprehensive user guide for the Douk Audio P6 HiFi Bluetooth Valve Tube Preamp, detailing front/rear panel features, operation steps, technical specifications, and frequently asked questions.

Douk Audio TONE Bluetooth Amplifier User Manual and Specifications

user manual

Comprehensive guide to the Douk Audio TONE Bluetooth amplifier, covering features, usage instructions, technical specifications, and connectivity options for home audio systems.

Douk Audio VU2: Multi-functional VU Meter and Audio Splitter User Guide

product overview

Comprehensive guide to the Douk Audio VU2, a versatile analog VU meter and 4-way audio splitter/switcher. Learn about its features, usage instructions, and technical specifications for optimizing your audio setup.

Douk Audio C100 Mini HiFi Preamp User Manual

manual

User manual for the Douk Audio C100 Mini HiFi Preamp, detailing front and rear panel descriptions, operation steps, remote control functions, screen display information, specifications, and troubleshooting FAQs.

Douk Audio ST-01/ST-01 PRO HiFi Valve Amplifier User Manual

manual

Comprehensive user manual for the Douk Audio ST-01 and ST-01 PRO HiFi Valve Amplifiers, covering operation, features, specifications, and troubleshooting.

Douk Audio M10 Amplifier User Manual

manual

User manual for the Douk Audio M10 Hi-Fi Stereo Amplifier, detailing its features, connections, and operation for optimal audio performance.

Douk Audio T3 PLUS Valve Tube Preamp User Manual

manual

Comprehensive user manual for the Douk Audio T3 PLUS HiFi Vacuum Tube MM/MC Phono Preamp, detailing operation, specifications, and troubleshooting.

Douk Audio manuals from online retailers

Nobsound Hi-Fi Bluetooth 5.0 Power Amplifier User Manual

8541737967 • December 30, 2025

Instruction manual for the Nobsound Hi-Fi Bluetooth 5.0 Power Amplifier (Model 8541737967), covering setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio MC5-BX Mini Stereo 4-Channel Audio Mixer User Manual

MC5-BX • December 30, 2025

Comprehensive user manual for the Douk Audio MC5-BX Mini Stereo 4-Channel Audio Mixer, covering setup, operation, specifications, and troubleshooting for active and passive modes.

Nobsound NS-01G-MAX 2-Channel 200W Bluetooth Amplifier User Manual

NS-01G-MAX • December 29, 2025

Comprehensive instruction manual for the Nobsound NS-01G-MAX 2-Channel 200W Bluetooth Amplifier, covering setup, operation, maintenance, troubleshooting, and specifications for optimal audio performance.

Douk Audio VFD253 Audio Spectrum Analyzer Bluetooth 5.0 Receiver Instruction Manual

VFD253 • December 27, 2025

Comprehensive instruction manual for the Douk Audio VFD253 Audio Spectrum Analyzer, Bluetooth 5.0 Receiver, and 3.5mm AUX Selector, covering setup, operation, features, and specifications.

Douk Audio P2 Mini Bluetooth 5.0 Vacuum Tube Preamp User Manual

P2 • December 26, 2025

Comprehensive user manual for the Douk Audio P2 Mini Bluetooth 5.0 Vacuum Tube Preamp, covering setup, operation, maintenance, and specifications for model 13c8a2a1-6a16-47e7-bce0-b249d4c562fa.

Douk Audio H2 HiFi Vacuum Tube Headphone Amplifier User Manual

H2 • December 25, 2025

Comprehensive user manual for the Douk Audio H2 HiFi Vacuum Tube Headphone Amplifier, covering setup, operation, maintenance, troubleshooting, and specifications.

Nobsound NS-10G PRO Bluetooth 5.0 Power Amplifier Instruction Manual

NS-10G PRO • December 24, 2025

Instruction manual for the Nobsound NS-10G PRO Bluetooth 5.0 Power Amplifier, covering setup, operation, maintenance, and specifications.

DoukAudio MC5-BX Mini 4-Channel Stereo Line Mixer User Manual

MC5-BX • December 23, 2025

Comprehensive instruction manual for the DoukAudio MC5-BX Mini 4-Channel Stereo Line Mixer, covering setup, operation, maintenance, troubleshooting, and specifications for optimal audio mixing.

Douk Audio Nobsound NS-10G Mini Bluetooth 5.0 Digital Amplifier User Manual

NS-10G • December 20, 2025

Comprehensive instruction manual for the Douk Audio Nobsound NS-10G Mini Bluetooth 5.0 Digital Amplifier (Model DZ027), covering setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio A5 PRO 32V HiFi Stereo Amplifier User Manual

A5 PRO • December 20, 2025

Comprehensive user manual for the Douk Audio A5 PRO 32V 2-Channel Bluetooth Amplifier, providing detailed instructions for setup, operation, maintenance, and technical specifications.

Douk Audio VU102 2-Zone Speaker Selector Box Amplifier Switch User Manual

XX-VU102 • December 19, 2025

Comprehensive user manual for the Douk Audio VU102 2-Zone Speaker Selector Box Amplifier Switch, including setup, operation, specifications, and troubleshooting.

Douk Audio C100 PRO Digital Audio Player User Manual

C100 PRO • December 17, 2025

This manual provides detailed instructions for the setup, operation, and maintenance of your Douk Audio C100 PRO Digital Audio Player. Learn about its ESS9038 DAC, Bluetooth 5.0, versatile…

Douk Audio K5 USB DAC Headphone Amplifier User Manual

K5 • March 21, 2026

Comprehensive instruction manual for the Douk Audio K5 USB DAC Headphone Amplifier, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

VU56-PRO Stereo LED Sound Level Meter Music Spectrum Visualizer User Manual

VU56-PRO • March 20, 2026

Instruction manual for the VU56-PRO Stereo LED Sound Level Meter, Music Spectrum Visualizer, and Audio Adapter/Splitter. Includes setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio G3 Bluetooth 5.0 Stereo Amplifier User Manual

G3 • March 14, 2026

Comprehensive user manual for the Douk Audio G3 Bluetooth 5.0 Stereo Amplifier, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio M5.1 5.1 Channel Digital Amplifier Instruction Manual

M5.1 • March 11, 2026

Comprehensive instruction manual for the Douk Audio M5.1 5.1 Channel Digital Amplifier, covering setup, operation, specifications, and troubleshooting for optimal home theater audio experience.

DOUK AUDIO P1 PLUS Bluetooth Tube Preamplifier User Manual

P1 PLUS • March 10, 2026

Comprehensive user manual for the DOUK AUDIO P1 PLUS Bluetooth Tube Preamplifier, USB Optical Coaxial DAC, and DSD256 Headphone Amp. Includes setup, operation, specifications, maintenance, troubleshooting, and user…

Douk Audio Q4 Mini Bluetooth 5.0 Stereo Receiver USB DAC User Manual

Q4 • March 10, 2026

Detailed instruction manual for the Douk Audio Q4 Mini Bluetooth 5.0 Stereo Receiver and Digital-to-Analog Converter. Covers setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio SP102 / SP102 PRO Passive Audio Selector Instruction Manual

SP102 PRO • March 5, 2026

This manual provides detailed instructions for the Douk Audio SP102 and SP102 PRO passive 2-way audio selectors, designed for switching between amplifiers and speakers. It covers setup, operation,…

Douk Audio G4 Mini Subwoofer / Full-Frequency Mono Channel Digital Amplifier User Manual

G4 • March 5, 2026

This manual provides detailed instructions for the setup, operation, and maintenance of the Douk Audio G4 Mini Subwoofer / Full-Frequency Mono Channel Digital Amplifier. Designed for HiFi home…

Douk Audio P2 Mini Tube Preamp User Manual

P2 • March 5, 2026

Comprehensive user manual for the Douk Audio P2 Mini Tube Preamp, covering setup, operation, maintenance, specifications, and troubleshooting for its Bluetooth, RCA, USB, and TF card audio functions.

Douk Audio U4 Mini Tube Preamp User Manual

U4 • March 4, 2026

Comprehensive instruction manual for the Douk Audio U4 Mini Bluetooth 5.0 Tube Headphone Amplifier, USB DAC, and Stereo Audio Preamp. Includes setup, operation, specifications, and troubleshooting.

Douk Audio X1 HiFi Vacuum Tube Amplifier User Manual

X1 • March 3, 2026

Instruction manual for the Douk Audio X1 HiFi Vacuum Tube Amplifier, covering setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio G4 Mini Digital Amplifier User Manual

G4 • March 1, 2026

Comprehensive instruction manual for the Douk Audio G4 Mini Digital Amplifier, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio video guides

Watch setup, installation, and troubleshooting videos for this brand.

DOUK AUDIO M1 PRO Mini Power Amplifier with Bluetooth & USB - 360 Product Overview

0:28 • 1280×720 • visual_overview

DOUK AUDIO A5 Digital Amplifier: Visual Overview and Setup Guide

1:07 • 1920×1080 • visual_overview

Douk Audio U5 Mini Fully Balanced Headphone Amplifier with XLR and 4.4mm Outputs

0:30 • 1920×1080 • visual_overview

Douk Audio BS-1 Tactile Bass Shaker Transducer: Experience Immersive Bass

0:33 • 1280×720 • demonstration

Douk Audio NS-13G Mini Digital Amplifier Setup and Features Overview

0:43 • 1920×1080 • setup

Douk Audio T13 Mini Tube MM Phono Preamplifier with VU Meters and Adjustable Backlight

0:56 • 1920×1080 • feature_demo

Douk Audio Manuals & User Guides

Douk Audio manuals

Douk Audio manuals from online retailers

DOUK AUDIO M1 PRO Mini Power Amplifier with Bluetooth & USB - 360 Product Overview

DOUK AUDIO A5 Digital Amplifier: Visual Overview and Setup Guide

Douk Audio U5 Mini Fully Balanced Headphone Amplifier with XLR and 4.4mm Outputs

Douk Audio BS-1 Tactile Bass Shaker Transducer: Experience Immersive Bass

Douk Audio NS-13G Mini Digital Amplifier Setup and Features Overview

Douk Audio T13 Mini Tube MM Phono Preamplifier with VU Meters and Adjustable Backlight

Douk Audio U3 Mini Class A Headphone Amplifier Setup and Demonstration

Douk Audio VU22 Retro VU Meter Sound Level Display with Color Changing Lights

Douk Audio VU22 VU Meter Audio Spectrum Analyzer with Color Modes

Douk Audio VU22 VU Meter Audio Spectrum Analyzer with Color Changing Display

Douk Audio EQ5 5-Band EQ Preamplifier for Hi-Fi Audio Systems

Douk Audio EQ5 5-Band EQ Preamplifier for Enhanced Audio Control