📘 Douk Audio manuals • Free online PDFs

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 1424 Music Spectrum Audio Spectrum Sound Level LED Level Meter Display Analyzer Instruction Manual

April 26, 2024

DOUK AUDIO 1424 Music Spectrum Audio Spectrum Sound Level LED Level Meter Display Analyzer How to use Key operation Short press: M ---mode switching ▲--- increase brightness ▼---decrease brightness (recommended…

DOUK AUDIO MC5 PRO 2 Channel Line Mixer Headphone Monitoring Club Live Studio Recording User Manual

March 23, 2024

ONE Lite Bear MC5 PRO 2 Channel Line Mixer Headphone Monitoring Club Live Studio Recording User Manual Introduction MX3 I MC5 PRO is a mini audio mixer with 2 groups…

DOUK AUDIO LP Vinyl Record Cleaning Clamp Instructions

February 29, 2024

DOUK AUDIO LP Vinyl Record Cleaning Clamp Introduction Adopt a high-quality silicone waterproof rubber band and transparent design, allow you to see your record label is DRY while you are…

DOUK AUDIO GE JAN 5654W Matched Pair 7 Pin Vacuum Tubes Instruction Manual

February 27, 2024

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Introduction AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE. 5654W tubes should only be used to replace 7-Pin…

DOUK AUDIO A1 Microphone Headset Speaker Audio Switcher User Manual

January 10, 2024

DOUK AUDIO A1 Microphone Headset Speaker Audio Switcher Introduction MC1024-MINI is a 2-way speaker/headphone switcher box with full function, just need to connect audio sources such as computer, phone, game…

DOUK AUDIO DSD256 Mini HiFi Preamp Digital Audio USB Player Instruction Manual

January 10, 2024

DSD256 Mini HiFi Preamp Digital Audio USB Player Instruction Manual Thank you very much for choosing our products!Please read this manual carefully before using the product. Front and rear panel…

DOUK AUDIO PJ587_NEW Nobsound 150W 24V/6AAC/DC Power Supply User Manual

January 6, 2024

DOUK AUDIO PJ587_NEW Nobsound 150W 24V/6AAC/DC Power Supply Specifications Power Supply: 150W 24V/6A AC/DC Input Voltage: Universal wide voltage of 100V-240V 50/60Hz Circuit Protection: Automatic overload cut-off, over-voltage cut-off, automatic…

DOUK AUDIO T3 Pro Phono Stage Vacuum Tube Preamp Instructions

January 4, 2024

T3 PRO MM Phono Stage Vacuum Tube Preamp How to use Connect the active speakers or an amplifier to the RCA output of T3 PRO. Connect the turntable to the…

DOUK AUDIO SP102 Audio Selector Stereo Switcher for Amplifier Speaker Instruction Manual

January 4, 2024

DOUK AUDIO SP102 Audio Selector Stereo Switcher for Amplifier Speaker Introduction SP102 is a passive audio selector, convenient to compare the sound quality of 2 pair of different speakers or…

DOUK AUDIO AKDB32 Color RGB LED MIC Sound Level Meter Audio Spectrum Instructions

December 27, 2023

DOUK AUDIO AKDB32 Color RGB LED MIC Sound Level Meter Audio Spectrum Instructions Warm Tips The whole display screen is covered by a layer of protective film, please remove it…

Douk Audio Vacuum Tube Amplifier User Manual

User Manual

User manual for the Douk Audio HiFi Stereo Bluetooth 5.0 Vacuum Tube Amplifier MM Phono Amp for Turntables 320W, covering specifications, operation, and troubleshooting.

Nobsound G3 Mini Bluetooth Digital Amplifier with Tone Control - Douk Audio User Manual

User Manual

User manual for the Nobsound G3 Mini Bluetooth Digital Amplifier by Douk Audio. Features include tone control, Bluetooth connectivity, and detailed specifications, functions, and troubleshooting.

DOUK AUDIO Bluetooth Amplifier USB Music Player User Manual

manual

User guide for the DOUK AUDIO Bluetooth Amplifier USB Music Player, covering setup instructions, technical specifications, packing list, and contact details.

Douk Audio SP102 Passive Audio Selector User Manual

manual

User manual for the Douk Audio SP102 passive audio selector, detailing its features, operation, specifications, and contact information. Supports 200W per channel and multiple amplifier/speaker configurations.

Douk Audio D1 Audio Amplifier User Manual

User Manual

User manual for the Douk Audio D1 audio amplifier, detailing its features, specifications, front and rear panel controls, and operational instructions for optimal audio performance.

Douk Audio M5.1 Amplifier User Manual and Specifications

User Manual

This manual provides comprehensive instructions for the Douk Audio M5.1 amplifier, including setup, operation, troubleshooting FAQs, technical parameters, and front/back panel descriptions. Learn how to connect your audio sources and…

DOUK AUDIO Lepy 168 Plus Bluetooth Amplifier for Home & Car | Hi-Fi Stereo USB/AUX/RCA

product overview

Discover the DOUK AUDIO Lepy 168 Plus, a versatile 2.1 channel Bluetooth power amplifier designed for home and car use. This mini Hi-Fi stereo amplifier offers 90W total output, multiple…

ONE Little Bear P32 FU32 Tube Hybrid Headphone Amplifier

product overview

Detailed overview of the ONE Little Bear P32 FU32 tube hybrid headphone amplifier by Douk audio. Features include vacuum tube amplification, multiple input/output options, upgradeable OP chips, and specifications for…

DOUK AUDIO AV-889 HiFi Bluetooth 5.0 Tube Power Amplifier Specifications

Product Overview

Explore the detailed specifications and usage tips for the DOUK AUDIO AV-889 HiFi Bluetooth 5.0 Tube Power Amplifier, a high-fidelity audio device with versatile connectivity options.

Douk Audio G7 Amplifier User Manual - High-Fidelity Audio

User Manual

Comprehensive user manual for the Douk Audio G7 amplifier, detailing features, specifications, connections, operation, and troubleshooting for optimal high-fidelity audio performance.

Douk Audio AMPAPA-D1 User Manual - Setup and Operation Guide

User Manual

Comprehensive user manual for the Douk Audio AMPAPA-D1 amplifier, covering setup, operation, specifications, and troubleshooting. Learn how to get the most out of your audio device.

DOUK AUDIO 7.83Hz Schumann Wave Resonance Generator: Features, Applications, Specifications, and Contact

Product Overview

Explore the DOUK AUDIO 7.83Hz Schumann Wave Resonance Generator (Model FM 783). This comprehensive overview covers essential warm tips, detailed features and category applications including HIFI audio, sleep enhancement, creative…

Douk Audio manuals from online retailers

Douk Audio Nobsound NS-02E Vacuum Tube Headphone Amplifier User Manual

NS-02E • March 11, 2026

Comprehensive instruction manual for the Douk Audio Nobsound NS-02E Vacuum Tube Headphone Amplifier, covering setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio Nobsound CT1-P Plate Bias Current Probe Tester User Manual

CT1-P • March 7, 2026

Comprehensive user manual for the Douk Audio Nobsound CT1-P Plate Bias Current Probe Tester, including setup, operation, troubleshooting, and specifications for vacuum tube amplifiers.

Douk Audio Q4 Mini Bluetooth 5.0 Headphone Amplifier and USB DAC User Manual

Q4 • March 5, 2026

Comprehensive instruction manual for the Douk Audio Q4 Mini Bluetooth 5.0 Headphone Amplifier and USB DAC, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio VU9 Pixie Tube Sound Level Meter Instruction Manual

XX-VU9-2024 • February 28, 2026

Comprehensive instruction manual for the Douk Audio VU9 Pixie Tube Sound Level Meter, covering setup, operation, features, and specifications for optimal use.

Douk Audio G5 100W Bluetooth 5.0 2-Channel Mini Digital Stereo Audio Power Amplifier User Manual

G5 • February 17, 2026

Comprehensive user manual for the Douk Audio G5 mini digital stereo amplifier, covering product features, setup instructions, operating procedures, maintenance tips, troubleshooting guide, and detailed technical specifications.

Douk Audio MC1022 Mini Audio Switcher User Manual

MC1022 • February 12, 2026

Comprehensive user manual for the Douk Audio MC1022 Mini Audio Switcher, covering setup, operation, features, specifications, and troubleshooting for 2-way RCA stereo passive selector.

Douk Audio M100 Mini Bluetooth 5.0 Digital Amplifier User Manual

M100 • February 9, 2026

Comprehensive user manual for the Douk Audio M100 Mini Bluetooth 5.0 Digital Amplifier. This guide covers features, setup, operation, specifications, and troubleshooting for optimal home audio performance.

Douk Audio T14-EQ Phono Preamp User Manual

T14-EQ • February 8, 2026

Comprehensive user manual for the Douk Audio T14-EQ Phono Preamp, covering setup, operation, features, and troubleshooting for MM/MC turntables.

Douk Audio P7 Vacuum Tube Phono Preamplifier User Manual

SUC-P7 • February 4, 2026

Comprehensive user manual for the Douk Audio P7 Phono Preamp, featuring vacuum tube amplification, balanced XLR output, high-pass filter, and tone controls for MM record players.

Douk Audio T7 7-Band Equalizer Balanced XLR/RCA Preamplifier User Manual

T7 • February 2, 2026

Comprehensive user manual for the Douk Audio T7 7-Band Equalizer Balanced XLR/RCA Preamplifier, covering setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio VU22 Dual Analog VU Meter Display MIC+LINE Sound Level Meter Instruction Manual

VU22 • February 2, 2026

Comprehensive instruction manual for the Douk Audio VU22 Dual Analog VU Meter, covering setup, operation, features, and specifications for optimal sound level monitoring and audio system integration.

Douk Audio L3 RCA Audio Switch User Manual

L3 • February 1, 2026

Official instruction manual for the Douk Audio L3 RCA Audio Switch, detailing setup, operation, maintenance, troubleshooting, and specifications for its 1-IN-3-OUT and 3-IN-1-OUT modes, VU meters, and remote…

Douk Audio NS-15G Mini Bluetooth 5.0 TPA3116 Digital Power Amplifier User Manual

NS-15G • 1 PDF • June 25, 2026

Comprehensive user manual for the Douk Audio NS-15G Mini Bluetooth 5.0 TPA3116 Digital Power Amplifier, including setup, operation, specifications, and troubleshooting.

Douk Audio P1PLUS HIFI Valve Tube Preamp User Manual

P1PLUS • 1 PDF • June 24, 2026

Comprehensive instruction manual for the Douk Audio P1PLUS HIFI Valve Tube Preamp with Bluetooth, USB, Coaxial, Optical inputs, and Headphone Amp DSD256 support. Includes setup, operation, specifications, and…

Douk Audio P2-FM Magic 6E2 Preamp Stereo Headphone Amp Sound Level Indicator FM Radio Clock User Manual

P2-FM • June 13, 2026

Comprehensive user manual for the Douk Audio P2-FM, covering setup, operation, maintenance, specifications, and troubleshooting for its preamp, headphone amplifier, sound level indicator, FM radio, and clock functions.

Douk Audio A5 PRO Stereo Bluetooth Amplifier Instruction Manual

A5 PRO • 1 PDF • June 9, 2026

Instruction manual for the Douk Audio A5 PRO Stereo Bluetooth Amplifier, covering setup, operation, maintenance, troubleshooting, specifications, and user tips.

Douk Audio NS-21G Mono Channel Subwoofer Amplifier User Manual

NS-21G • 1 PDF • June 3, 2026

Comprehensive user manual for the Douk Audio NS-21G Mono Channel Subwoofer Amplifier, including setup, operation, specifications, troubleshooting, and maintenance.

Douk Audio EQ9 9-Band Stereo Equalizer Preamp User Manual

EQ9 • June 2, 2026

Comprehensive user manual for the Douk Audio EQ9 9-Band Stereo Equalizer Preamp, including setup, operation, specifications, and troubleshooting for home and car audio systems.

Douk Audio ST-01 PRO HiFi Vacuum Tube Power Amplifier User Manual

ST-01 PRO • 1 PDF • May 26, 2026

Comprehensive instruction manual for the Douk Audio ST-01 PRO HiFi Vacuum Tube Power Amplifier, covering setup, operation, specifications, and troubleshooting for optimal audio experience.

Douk Audio M5.1 Digital Amplifier User Manual

M5.1 • 1 PDF • May 24, 2026

Comprehensive instruction manual for the Douk Audio M5.1 Digital Amplifier, covering setup, operation, troubleshooting, and specifications for its 5.1 channel audio system with Bluetooth 5.0, USB, coaxial, and…

Douk Audio X1 HiFi JAN5725 Vacuum Tube Amplifier User Manual

X1 • 1 PDF • May 22, 2026

Comprehensive user manual for the Douk Audio X1 HiFi JAN5725 Vacuum Tube Amplifier, covering setup, operation, specifications, and troubleshooting.

Douk Audio T14-EQ Phono Stage Preamp User Manual

T14-EQ • May 22, 2026

Comprehensive user manual for the Douk Audio T14-EQ Stereo RIAA MM/MC Phono Stage Preamplifier, including setup, operation, specifications, and troubleshooting.

Douk Audio VU360 Analog VU Meter Music Spectrum User Manual

VU360 • 1 PDF • May 20, 2026

Comprehensive instruction manual for the Douk Audio VU360 Retro Analog VU Meter Music Spectrum. Learn about setup, operation, features, specifications, and troubleshooting for this vintage-inspired audio visualizer.

DOUK AUDIO D1 Ampapa Bluetooth Amplifier User Manual

D1 • 1 PDF • May 11, 2026

Comprehensive user manual for the DOUK AUDIO D1 Ampapa Bluetooth 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 VU9 Tube Sound Level Meter: Retro Audio Spectrum Analyzer with Multiple Display Modes

0:49 • 1920×1080 • feature_demo

DOUK AUDIO MM Phono Tube Amplifier for Turntables with Bluetooth and Speaker Output

0:28 • 1280×720 • visual_overview

Douk Audio HiFi Pure Brass Turntable Platter Mat 2mm P for Vinyl LP Record Player

0:23 • 1920×1080 • visual_overview

Douk Audio T3 Plus Mini Vacuum Tube Stereo Preamp HiFi Phono Pre-Amplifier Overview

0:29 • 1280×720 • visual_overview

Douk Audio U8 HiFi DAC Headphone Amplifier with ES9038Q2M Bluetooth 5.0 Balanced Decoder

0:28 • 1280×720 • feature_demo

Douk Audio VU9 Pixie Tube Sound Level Meter & Retro Audio Spectrum Clock Demo

0:58 • 1920×1080 • feature_demo

Douk Audio CT1-BOX 8-Pin Dual Bias Current Probes Tester with VU Meter for Tube Amplifiers

0:38 • 1920×1080 • feature_demo

DOUK AUDIO G3 PRO HiFi 2.1 Channel Bluetooth Digital Amplifier Setup & Demonstration

0:43 • 1280×720 • setup

DOUK AUDIO G4 PRO Digital Amplifier: Visual Overview & Setup Guide

1:16 • 1920×1080 • visual_overview

Douk Audio Manuals & User Guides

Douk Audio manuals

Douk Audio manuals from online retailers

Douk Audio VU9 Tube Sound Level Meter: Retro Audio Spectrum Analyzer with Multiple Display Modes

DOUK AUDIO MM Phono Tube Amplifier for Turntables with Bluetooth and Speaker Output

Douk Audio HiFi Pure Brass Turntable Platter Mat 2mm P for Vinyl LP Record Player

Douk Audio T8 Tube Preamplifier with EQ and Balanced XLR Inputs/Outputs

Douk Audio G4 Mono Bass Power Amplifier | Full Frequency & Subwoofer Amp 100W

Douk Audio L3 3-Channel Stereo Audio Loop Switcher with VU Meter and RCA Inputs

Douk Audio T3 Plus Mini Vacuum Tube Stereo Preamp HiFi Phono Pre-Amplifier Overview

Douk Audio U8 HiFi DAC Headphone Amplifier with ES9038Q2M Bluetooth 5.0 Balanced Decoder

Douk Audio VU9 Pixie Tube Sound Level Meter & Retro Audio Spectrum Clock Demo

Douk Audio CT1-BOX 8-Pin Dual Bias Current Probes Tester with VU Meter for Tube Amplifiers

DOUK AUDIO G3 PRO HiFi 2.1 Channel Bluetooth Digital Amplifier Setup & Demonstration

DOUK AUDIO G4 PRO Digital Amplifier: Visual Overview & Setup Guide