📘 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

Selected manuals from manuals+ curated for this brand.

Douk Audio manuals from online retailers

Nobsound Mini Bluetooth 5.0 Power Amplifier User Manual

GFJ058NEW • August 7, 2025

Comprehensive instruction manual for the Nobsound Mini Bluetooth 5.0 Power Amplifier (Model GFJ058NEW), covering setup, operation, maintenance, and troubleshooting for optimal audio performance.

Douk Audio A5PRO Bluetooth Amplifier User Manual

A5 PRO 48V • August 4, 2025

Comprehensive user manual for the Douk Audio A5PRO Bluetooth Amplifier, covering setup, operating instructions, maintenance, troubleshooting, and detailed specifications for the 2-channel HiFi stereo amp with TPA3255 chip.

Douk Audio C100 PRO Mini Hi-Res Bluetooth Music Streamer Digital Audio Player Preamp DAC User Manual

C100 PRO • August 4, 2025

Comprehensive user manual for the Douk Audio C100 PRO, a mini Hi-Res Bluetooth music streamer, digital audio player, preamp, and DAC. Includes detailed instructions for setup, operation, maintenance,…

DoukAudio M1 MAX Amplifier User Manual

M1 MAX • August 3, 2025

The DoukAudio M1 MAX is a high-performance 2-channel Bluetooth amplifier designed to deliver powerful and clear audio for your home stereo system. Featuring a TPA3255 amp chip, it…

Douk Audio 120W Mini Bluetooth 5.0 Power Amplifier User Manual

GFJ782_US • August 3, 2025

Comprehensive user manual for the Douk Audio 120W Mini Bluetooth 5.0 Power Amplifier, covering setup, operation, maintenance, troubleshooting, and specifications for model GFJ782_US.

Nobsound G2 Subwoofer Power Amplifier Mini Mono SUB Amp 100W PBTL BTL Bridge Home Theater User Manual

8541737971 • August 1, 2025

Instruction manual for the Nobsound G2 Subwoofer Power Amplifier, a mini mono SUB amp with 100W output, suitable for home theater systems.

Douk Audio P6 Mini Tube Preamp Speaker Receiver Stereo Pre-Amplifier USB Player User Manual

SUC-P6-MINI • July 28, 2025

The Douk Audio P6 Mini is a versatile tube preamplifier featuring Bluetooth 5.0, USB (U-disk), and Stereo RCA inputs. It enhances audio quality with a warm, mellow sound…

Douk Audio T3 PRO Vacuum Tube Phono Preamp User Manual

DZ075 • July 27, 2025

The Douk Audio T3 PRO is a versatile vacuum tube phono preamplifier designed for MM turntables and other audio sources. It features both MM signal input and a…

Douk Audio T7 7-Band Equalizer User Manual

SUC-T7 • July 21, 2025

Comprehensive user manual for the Douk Audio T7 7-Band Equalizer Balanced EQ Audio Preamp, including setup, operation, specifications, and troubleshooting.

Douk Audio K5 USB DAC Headphone Amplifier User Manual

K5 • July 15, 2025

Comprehensive user manual for the Douk Audio K5 USB DAC Headphone Amplifier. Learn about its features, setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio HiFi Stereo Bluetooth 5.0 Vacuum Tube Amplifier MM Phono Amp for Turntables 320W User Manual

SUC-X1 • July 13, 2025

The Douk Audio HiFi Stereo Bluetooth 5.0 Vacuum Tube Amplifier is a versatile audio component designed for audiophiles. It features MM Phono, Stereo RCA, and Bluetooth 5.0 inputs,…

Douk Audio T4 PRO Vacuum Tube Phono Preamp & Headphone Amplifier Instruction Manual

T4 • July 12, 2025

Comprehensive instruction manual for the Douk Audio T4 PRO Vacuum Tube Phono Preamp and Headphone Amplifier, covering setup, operation, maintenance, troubleshooting, and specifications.

Douk Audio M10 Mini Bluetooth 5.4 Amplifier User Manual

M10 • December 15, 2025

Instruction manual for the Douk Audio M10 Mini Bluetooth 5.4 Amplifier, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio DAC-T1 PRO Tube DAC Preamp User Manual

DAC-T1 PRO • December 13, 2025

Comprehensive user manual for the Douk Audio DAC-T1 PRO HiFi Bluetooth 5.0 Valve Tube Preamp, including setup, operation, specifications, and troubleshooting.

Douk Audio DAC-T2 HiFi Tube DAC Preamp Instruction Manual

DAC-T2 • December 13, 2025

Comprehensive instruction manual for the Douk Audio DAC-T2 HiFi Tube DAC Preamp, covering setup, operation, features, specifications, and troubleshooting for optimal audio performance.

Nobsound Q4 Mini Digital to Analog Converter Bluetooth Receiver User Manual

Q4 • December 6, 2025

Comprehensive user manual for the Nobsound Q4 Mini Digital to Analog Converter and Bluetooth Receiver, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio NS-01G Portable FM Radio Tuner & Bluetooth Receiver User Manual

NS-01G • December 4, 2025

Comprehensive user manual for the Douk Audio NS-01G portable FM radio tuner and Bluetooth 5.0 receiver. Includes setup, operation, specifications, and troubleshooting.

Douk Audio M4 Mini 2/4 Channel Bluetooth 5.0 Digital Amplifier User Manual

M4 • November 26, 2025

Comprehensive user manual for the Douk Audio M4 Mini 2/4 Channel Bluetooth 5.0 Digital Amplifier, covering setup, operation, specifications, and troubleshooting for optimal audio performance.

Douk Audio G2 PRO Mono Channel Power Amplifier User Manual

G2 PRO • November 22, 2025

Comprehensive user manual for the Douk Audio G2 PRO Hi-Fi 300W Subwoofer Amplifier, covering setup, operation, features, specifications, and troubleshooting.

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

T7 • November 13, 2025

User manual for the Douk Audio T7 7-Band Equalizer and Preamplifier, providing detailed instructions for setup, operation, maintenance, and specifications for optimal home audio enhancement.

Douk Audio P6 HiFi Bluetooth 5.1 Vacuum Tube Preamp User Manual

P6 • November 11, 2025

Instruction manual for the Douk Audio P6 HiFi Bluetooth 5.1 Vacuum Tube Preamp, Stereo Audio Amplifier, and Headphone Amp with VU Meter and APTX-HD support. Covers setup, operation,…

Douk Audio D5 4-Way Audio Switcher Splitter HiFi 5-Band Stereo EQ Preamp Equalizer with VU Meter User Manual

D5 • November 9, 2025

Comprehensive user manual for the Douk Audio D5, a versatile 4-way audio switcher and splitter, featuring a 5-band stereo equalizer, preamp, and a retro-style VU meter. Includes setup,…

Douk Audio A100 TPA3255 Digital Power Amplifier User Manual

A100 • November 5, 2025

Comprehensive user manual for the Douk Audio A100 TPA3255 Digital Power Amplifier, covering setup, operation, specifications, and troubleshooting for mono/stereo and bass/full-frequency audio modes.

Douk Audio ST-01 PRO Mini Tube Amplifier User Manual

ST-01 PRO • November 3, 2025

Comprehensive user manual for the Douk Audio ST-01 PRO HiFi Bluetooth 5.0 Vacuum Tube Amplifier, covering setup, operation, specifications, and troubleshooting.

Douk Audio video guides

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

Douk Audio VU9MINI RGB LED Tube Sound Level Meter Music Spectrum Display Feature Demo

0:53 • 1280×720 • feature_demo

Douk Audio T13 Turntable Phono RIAA Preamplifier with VU Meters & Headphone Output

0:56 • 852×480 • feature_demo

Douk Audio M4 Power Amplifier: Bluetooth 5.0, 4-Channel, 50W Output with RCA & USB Input

0:28 • 1280×720 • visual_overview

Douk Audio S3 HiFi Dynamic Driver In-Ear Headphones with Swappable 3.5mm/4.4mm Connectors

0:33 • 1280×720 • visual_overview

Douk Audio L3 3-Channel Stereo Audio Loop Switcher with VU Meter Setup and Demonstration

0:57 • 852×480 • setup

Douk Audio P2 FM HiFi Tube Bluetooth Preamplifier Receiver with VU Meter & Clock

1:12 • 1920×1080 • feature_demo

Douk Audio VU9 Tube Sound Level Meter: Retro Audio Spectrum Visualizer with Customizable Display

0:49 • 1280×720 • how_to

Douk Audio M4 Power Amplifier: Bluetooth 5.0, 4-Channel, 50W x 4 Output

0:28 • 852×480 • visual_overview

DOUK AUDIO L3 3-Channel Audio Loop Switcher with VU Meter and RCA Inputs

0:50 • 1280×720 • visual_overview