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Today's Deals
Best Tube Preamp Kit of 2026
Last updated on 20/04/2026
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1
Fosi Audio BOX X4 Phono Preamp Headphone Amplifier/Preamplifier Hi-Fi Pre Amp with JAN 5725W Vacuum Tubes for MM Turntable Phonograph Record Player with Volume Bass Treble Control
Fosi Audio
Why we love it
Unrivaled sound quality offered.
Includes low-frequency noise removal.
Supports DIY stereo customization.
Main Highlights
Pro-Grade MM Phono Stage with Grounding Terminal: Upgraded from BOX X2, the BOX X4 delivers audiophile-grade clarity for your turntable. Features a low-noise JAN 5725W vacuum tube preamp with MM input and built-in earth terminal to eliminate hum and protect vinyl systems. Ensure your turntable’s internal preamp is disabled for pure analog playback.
Dual-Output Flexibility--Preamp + Headphone Amp：Switch seamlessly between RCA line-level output for amplifiers and 3.5mm headphone output for private listening. Engineered to drive most headphones, ideal for late-night vinyl sessions without disturbing others.
Tube Rolling Flexibility for Custom Sound：Unlock endless audio personalities! Swap stock JAN 5725W tubes with 6K4/6J1/GE5654/6AK5 tubes (sold separately). A DIY haven for vinyl enthusiasts.
Active Bass & Treble Controls for Vinyl Optimization：Fine-tune your records with ±10dB bass/treble EQ – boost warmth for vintage LPs or sharpen detail for modern pressings. Paired with low-noise circuitry to preserve original analog character.
Complete Kit with Extended Warranty：Includes BOX X4 phono preamp, DC 12V power supply, user manual, our worry-free 24-month warranty, and friendly customer service.
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9.8
Exceptional
Check Price
9.8
Exceptional
Fosi Audio
Fosi Audio BOX X4 Phono Preamp Headphone Amplifier/Preamplifier Hi-Fi Pre Amp with JAN 5725W Vacuum Tubes for MM Turntable Phonograph Record Player with Volume Bass Treble Control
Check Price
Show More
Why we love it
Unrivaled sound quality offered.
Includes low-frequency noise removal.
Supports DIY stereo customization.
Main Highlights
Pro-Grade MM Phono Stage with Grounding Terminal: Upgraded from BOX X2, the BOX X4 delivers audiophile-grade clarity for your turntable. Features a low-noise JAN 5725W vacuum tube preamp with MM input and built-in earth terminal to eliminate hum and protect vinyl systems. Ensure your turntable’s internal preamp is disabled for pure analog playback.
Dual-Output Flexibility--Preamp + Headphone Amp：Switch seamlessly between RCA line-level output for amplifiers and 3.5mm headphone output for private listening. Engineered to drive most headphones, ideal for late-night vinyl sessions without disturbing others.
Tube Rolling Flexibility for Custom Sound：Unlock endless audio personalities! Swap stock JAN 5725W tubes with 6K4/6J1/GE5654/6AK5 tubes (sold separately). A DIY haven for vinyl enthusiasts.
Active Bass & Treble Controls for Vinyl Optimization：Fine-tune your records with ±10dB bass/treble EQ – boost warmth for vintage LPs or sharpen detail for modern pressings. Paired with low-noise circuitry to preserve original analog character.
Complete Kit with Extended Warranty：Includes BOX X4 phono preamp, DC 12V power supply, user manual, our worry-free 24-month warranty, and friendly customer service.
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Value for Money
2
Jolooyo 6J1 Valve Pre-amp Tube PreAmplifier Kit Assembled Board Audio Musical Fidelity
Jolooyo
Why we love it
Efficient voltage delivery system.
Compact and space-saving design.
Ideal for various applications.
Main Highlights
Voltage: AC12V 500mA
Dimension: 170mm x 60mm High 28MM
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9.7
Exceptional
Check Price
9.7
Exceptional
Jolooyo
Jolooyo 6J1 Valve Pre-amp Tube PreAmplifier Kit Assembled Board Audio Musical Fidelity
Check Price
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Why we love it
Efficient voltage delivery system.
Compact and space-saving design.
Ideal for various applications.
Main Highlights
Voltage: AC12V 500mA
Dimension: 170mm x 60mm High 28MM
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3
Douk Audio Valve Tube Preamp: Headphone Amplifier with VU Meter, 4-Way RCA Selector Switch Box, Pre Amp with Tone Control for Receivers, Amplifiers, Speakers, 16-600Ω Headphones (TUBE-T5C)
Nobsound
10% Off
Why we love it
Seamless audio source management.
Unleash dynamic headphone sound.
Customize with op-amp upgrades.
Main Highlights
Tube Preamp with 4-Way RCA Selector & Splitter: Seamlessly manage up to 4 high-fidelity audio sources (CD players, DACs, Blu-ray players, streamers) without swapping cables, while our 180V optimized tube circuit and metal-shielded isolated power deliver cleaner, interference-free signals for your home stereo receiver and speakers.
High-Fidelity Tube Headphone Amplifier: Unleash up to 500mW of pure tube power, effortlessly driving 16-600Ω headphones (compatible with Sennheiser HD600/650, Beyerdynamic DT 990 Pro etc.). Experience rich, dynamic sound with adjustable bass/treble controls (±6dB) for personalized tonal perfection.
Vintage VU Meter & Premium Glowing Tubes: Elevate your listening space with the mesmerizing dual-channel VU Meter and warm glow of genuine vacuum tubes. Enhanced by customizable RGB lighting, it delivers an immersive retro ambiance perfect for audiophiles in any home stereo or studio setup.
Ultra-Low Noise Signal Purity: Engineered for audiophile-grade clarity, our isolated power section with full metal shielding dramatically reduces interference. Combined with a THD ≤0.06% and SNR ≥107dB, it ensures the cleanest possible audio signal path from source to your speakers or headphones.
Effortless Customization: Easy Op-amp & Tube Upgrades: Unlock endless sonic possibilities with our user-friendly pluggable sockets. Easily swap the included NE5532 op-amp for higher-end 2134/2604/5532/2068/muse02 dual op-amps or replace the default ECC83 tube with premium PSVANE 12AX7-S / Shuguang 12AX7B / 7025 to tailor your unique listening journey.
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9.6
Superb
Check Price
9.6
Superb
Nobsound
Douk Audio Valve Tube Preamp: Headphone Amplifier with VU Meter, 4-Way RCA Selector Switch Box, Pre Amp with Tone Control for Receivers, Amplifiers, Speakers, 16-600Ω Headphones (TUBE-T5C)
10% Off
Check Price
Show More
Why we love it
Seamless audio source management.
Unleash dynamic headphone sound.
Customize with op-amp upgrades.
Main Highlights
Tube Preamp with 4-Way RCA Selector & Splitter: Seamlessly manage up to 4 high-fidelity audio sources (CD players, DACs, Blu-ray players, streamers) without swapping cables, while our 180V optimized tube circuit and metal-shielded isolated power deliver cleaner, interference-free signals for your home stereo receiver and speakers.
High-Fidelity Tube Headphone Amplifier: Unleash up to 500mW of pure tube power, effortlessly driving 16-600Ω headphones (compatible with Sennheiser HD600/650, Beyerdynamic DT 990 Pro etc.). Experience rich, dynamic sound with adjustable bass/treble controls (±6dB) for personalized tonal perfection.
Vintage VU Meter & Premium Glowing Tubes: Elevate your listening space with the mesmerizing dual-channel VU Meter and warm glow of genuine vacuum tubes. Enhanced by customizable RGB lighting, it delivers an immersive retro ambiance perfect for audiophiles in any home stereo or studio setup.
Ultra-Low Noise Signal Purity: Engineered for audiophile-grade clarity, our isolated power section with full metal shielding dramatically reduces interference. Combined with a THD ≤0.06% and SNR ≥107dB, it ensures the cleanest possible audio signal path from source to your speakers or headphones.
Effortless Customization: Easy Op-amp & Tube Upgrades: Unlock endless sonic possibilities with our user-friendly pluggable sockets. Easily swap the included NE5532 op-amp for higher-end 2134/2604/5532/2068/muse02 dual op-amps or replace the default ECC83 tube with premium PSVANE 12AX7-S / Shuguang 12AX7B / 7025 to tailor your unique listening journey.
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4
2 Sets Tube Amplifier Kit, 6j1 Electron Valve Pre-Amp Diy Preamplifier, Enclosure Protection Parts Kit With Case Shell Kit, 6j1 Valve Tube Preamplifier Board Kit (Parts)
SagaSave
Why we love it
Premium materials ensure high performance.
Stronger tube performance enhances sound.
Easy installation for quick setup.
Main Highlights
Premium Material: The 6J1-2 fever tube pre-amp board uses a single 12V AC input and features a boost function, allowing a low supply voltage to achieve high-pressure tube effects. It requires an AC 12V 0.8A power supply with a 5.5*2.5 plug or a transformer (DC is not supported).
Strong Practicality: The 6J1-2 fever tube pre-amp board is designed based on the circuit schematic of the Music Fax X-10D, with rational optimizations for more stable performance compared to the original. The tube performance is increased by 10%.
Scope of Application: The 6J1 electronic tube preamplifier can replace tube types such as 6AK5, 5654, and 6AU6. It features an 8-capacitor filter with 470UF each, ensuring very clean output. The 6J1 electronic tube preamplifier is also very easy to install.
Easy to Use: The preamplifier board's excellent power supply system ensures that the four 470UF capacitors filter cleanly. The tube filament is connected in series and powered by a DC 12V supply, effectively reducing noise.
With Valve Preamp Shell: Each acrylic part of the protective sleeve kit is covered with protective layers on both sides to prevent scratches. Remove the protective cover before use.
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9.4
Superb
Check Price
9.4
Superb
SagaSave
2 Sets Tube Amplifier Kit, 6j1 Electron Valve Pre-Amp Diy Preamplifier, Enclosure Protection Parts Kit With Case Shell Kit, 6j1 Valve Tube Preamplifier Board Kit (Parts)
Check Price
Show More
Why we love it
Premium materials ensure high performance.
Stronger tube performance enhances sound.
Easy installation for quick setup.
Main Highlights
Premium Material: The 6J1-2 fever tube pre-amp board uses a single 12V AC input and features a boost function, allowing a low supply voltage to achieve high-pressure tube effects. It requires an AC 12V 0.8A power supply with a 5.5*2.5 plug or a transformer (DC is not supported).
Strong Practicality: The 6J1-2 fever tube pre-amp board is designed based on the circuit schematic of the Music Fax X-10D, with rational optimizations for more stable performance compared to the original. The tube performance is increased by 10%.
Scope of Application: The 6J1 electronic tube preamplifier can replace tube types such as 6AK5, 5654, and 6AU6. It features an 8-capacitor filter with 470UF each, ensuring very clean output. The 6J1 electronic tube preamplifier is also very easy to install.
Easy to Use: The preamplifier board's excellent power supply system ensures that the four 470UF capacitors filter cleanly. The tube filament is connected in series and powered by a DC 12V supply, effectively reducing noise.
With Valve Preamp Shell: Each acrylic part of the protective sleeve kit is covered with protective layers on both sides to prevent scratches. Remove the protective cover before use.
Show More
5
6J1 Vacuum Tube Valve Preamp DIY Building Kit with Headphone Output Socket
YWBL-WH
Why we love it
Excellent filtering, clear sound.
Enjoyable DIY building experience.
Reduces noise effectively.
Main Highlights
Parts Included: This tube headphone amp kit includes parts so you can put them together yourself and enjoy the process of building your own tube amp.
Tube preamplifier: 6J1 tube preamplifier is connected between the sound source and power amplifier. The tube preamplifier kit can effectively filter the digital taste, and the music and vocals will be better
Coupling capacitor: high frequency low resistance electrodeless electrolytic capacitor.
Power supply: use DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just solder the power line to the circuit board
Eight 470UF capacitor filters: Eight 470UF capacitor filters are very clean, and the excellent power supply system causes no hum. The filament is powered by DC 12V and needs to be connected in series to reduce noise.
Show More
9.3
Superb
Check Price
9.3
Superb
YWBL-WH
6J1 Vacuum Tube Valve Preamp DIY Building Kit with Headphone Output Socket
Check Price
Show More
Why we love it
Excellent filtering, clear sound.
Enjoyable DIY building experience.
Reduces noise effectively.
Main Highlights
Parts Included: This tube headphone amp kit includes parts so you can put them together yourself and enjoy the process of building your own tube amp.
Tube preamplifier: 6J1 tube preamplifier is connected between the sound source and power amplifier. The tube preamplifier kit can effectively filter the digital taste, and the music and vocals will be better
Coupling capacitor: high frequency low resistance electrodeless electrolytic capacitor.
Power supply: use DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just solder the power line to the circuit board
Eight 470UF capacitor filters: Eight 470UF capacitor filters are very clean, and the excellent power supply system causes no hum. The filament is powered by DC 12V and needs to be connected in series to reduce noise.
Show More
6
6j1 Amp Stereo Bile Preamplifier Kit, Diy Tube Amplifier Kit With Valve Preamp Shell Kit, 6j1 Valve Tube Preamplifier Board Kit, Amplifier Board Headphone Amp Parts (Parts)
Supertool
Why we love it
High-pressure tube effects achieved.
Optimized for more stable performance.
Easy installation for various applications.
Show More
9.2
Superb
Check Price
9.2
Superb
Supertool
6j1 Amp Stereo Bile Preamplifier Kit, Diy Tube Amplifier Kit With Valve Preamp Shell Kit, 6j1 Valve Tube Preamplifier Board Kit, Amplifier Board Headphone Amp Parts (Parts)
Check Price
Show More
Why we love it
High-pressure tube effects achieved.
Optimized for more stable performance.
Easy installation for various applications.
Show More
7
Tube Headphone Amplifier Kit, 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit
Yunir
Why we love it
Enhances music and voice clarity.
Noise reduction for high performance.
Fun DIY assembly experience.
Main Highlights
Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good
Eight 470UF capacitor filter is very clean, excellent power system lead to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise
Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance
Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board
This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier
Show More
9.1
Superb
Check Price
9.1
Superb
Yunir
Tube Headphone Amplifier Kit, 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit
Check Price
Show More
Why we love it
Enhances music and voice clarity.
Noise reduction for high performance.
Fun DIY assembly experience.
Main Highlights
Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good
Eight 470UF capacitor filter is very clean, excellent power system lead to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise
Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance
Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board
This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier
Show More
8
Adfaga 6J1 Vacuum Tube Valve Preamp Amplifier Board DIY Kit with 2x 6J1 Tubes for Audiophiles to Build High Fidelity Stereo Preamplifier with Warm Natural Sound 77x75mm Circuit Boa
Adfaga
Why we love it
Authentic tube warmth.
Low-noise power delivery.
Compact installation options.
Main Highlights
[PROFESSIONAL GRADE TUBE SOUND] Experience authentic vacuum tube warmth with our 6J1 preamp kit that transforms digital audio into rich, natural sound. The carefully engineered circuit delivers smooth highs, detailed mids and punchy bass that brings music to life while effectively eliminating harsh digital artifacts.
[ULTRA CLEAN POWER DELIVERY] Our advanced power system features eight high-quality 470UF filtering capacitors and DC 12V powered filaments arranged in series to eliminate hum and noise. The premium electrodeless electrolytic coupling capacitors ensure wide frequency response with minimal distortion for pristine audio quality.
[FLEXIBLE INSTALLATION OPTIONS] Designed for both convenience and customization, the preamp accepts standard DC 5.5*2.1 power input or can be directly wired to an AC 12V transformer. The compact 77x75mm board fits easily in most audio setups while delivering professional performance.
[COMPREHENSIVE DIY PACKAGE] Everything included for a rewarding building experience: 2x 6J1 tubes, PCB, all necessary resistors, capacitors, transistors, jacks, potentiometer, hardware and detailed instructions. for audio enthusiasts who want to assemble their own high-end tube preamplifier.
[INTUITIVE USER CONTROLS] Features simple input/output connections and an integrated power/volume knob with clear on/off click positions. The elegant design combines vintage tube technology with modern functionality, creating a versatile preamp that enhances any audio system.
Show More
9.0
Superb
Check Price
9.0
Superb
Adfaga
Adfaga 6J1 Vacuum Tube Valve Preamp Amplifier Board DIY Kit with 2x 6J1 Tubes for Audiophiles to Build High Fidelity Stereo Preamplifier with Warm Natural Sound 77x75mm Circuit Boa
Check Price
Show More
Why we love it
Authentic tube warmth.
Low-noise power delivery.
Compact installation options.
Main Highlights
[PROFESSIONAL GRADE TUBE SOUND] Experience authentic vacuum tube warmth with our 6J1 preamp kit that transforms digital audio into rich, natural sound. The carefully engineered circuit delivers smooth highs, detailed mids and punchy bass that brings music to life while effectively eliminating harsh digital artifacts.
[ULTRA CLEAN POWER DELIVERY] Our advanced power system features eight high-quality 470UF filtering capacitors and DC 12V powered filaments arranged in series to eliminate hum and noise. The premium electrodeless electrolytic coupling capacitors ensure wide frequency response with minimal distortion for pristine audio quality.
[FLEXIBLE INSTALLATION OPTIONS] Designed for both convenience and customization, the preamp accepts standard DC 5.5*2.1 power input or can be directly wired to an AC 12V transformer. The compact 77x75mm board fits easily in most audio setups while delivering professional performance.
[COMPREHENSIVE DIY PACKAGE] Everything included for a rewarding building experience: 2x 6J1 tubes, PCB, all necessary resistors, capacitors, transistors, jacks, potentiometer, hardware and detailed instructions. for audio enthusiasts who want to assemble their own high-end tube preamplifier.
[INTUITIVE USER CONTROLS] Features simple input/output connections and an integrated power/volume knob with clear on/off click positions. The elegant design combines vintage tube technology with modern functionality, creating a versatile preamp that enhances any audio system.
Show More
9
Tube Amplifier Kit, 6j1 Electron Valve Pre-Amp Diy Preamplifier, Enclosure Protection Parts Kit With Case Shell Kit, 6j1 Valve Tube Preamplifier Board Kit (Parts)
SagaSave
Why we love it
Premium materials enhance performance.
Strong practicality for stability.
Easy installation for all users.
Main Highlights
Premium Material: The 6J1-2 fever tube pre-amp board uses a single 12V AC input and features a boost function, allowing a low supply voltage to achieve high-pressure tube effects. It requires an AC 12V 0.8A power supply with a 5.5*2.5 plug or a transformer (DC is not supported).
Strong Practicality: The 6J1-2 fever tube pre-amp board is designed based on the circuit schematic of the Music Fax X-10D, with rational optimizations for more stable performance compared to the original. The tube performance is increased by 10%.
Scope of Application: The 6J1 electronic tube preamplifier can replace tube types such as 6AK5, 5654, and 6AU6. It features an 8-capacitor filter with 470UF each, ensuring very clean output. The 6J1 electronic tube preamplifier is also very easy to install.
Easy to Use: The preamplifier board's excellent power supply system ensures that the four 470UF capacitors filter cleanly. The tube filament is connected in series and powered by a DC 12V supply, effectively reducing noise.
With Valve Preamp Shell: Each acrylic part of the protective sleeve kit is covered with protective layers on both sides to prevent scratches. Remove the protective cover before use.
Show More
8.8
Excellent
Check Price
8.8
Excellent
SagaSave
Tube Amplifier Kit, 6j1 Electron Valve Pre-Amp Diy Preamplifier, Enclosure Protection Parts Kit With Case Shell Kit, 6j1 Valve Tube Preamplifier Board Kit (Parts)
Check Price
Show More
Why we love it
Premium materials enhance performance.
Strong practicality for stability.
Easy installation for all users.
Main Highlights
Premium Material: The 6J1-2 fever tube pre-amp board uses a single 12V AC input and features a boost function, allowing a low supply voltage to achieve high-pressure tube effects. It requires an AC 12V 0.8A power supply with a 5.5*2.5 plug or a transformer (DC is not supported).
Strong Practicality: The 6J1-2 fever tube pre-amp board is designed based on the circuit schematic of the Music Fax X-10D, with rational optimizations for more stable performance compared to the original. The tube performance is increased by 10%.
Scope of Application: The 6J1 electronic tube preamplifier can replace tube types such as 6AK5, 5654, and 6AU6. It features an 8-capacitor filter with 470UF each, ensuring very clean output. The 6J1 electronic tube preamplifier is also very easy to install.
Easy to Use: The preamplifier board's excellent power supply system ensures that the four 470UF capacitors filter cleanly. The tube filament is connected in series and powered by a DC 12V supply, effectively reducing noise.
With Valve Preamp Shell: Each acrylic part of the protective sleeve kit is covered with protective layers on both sides to prevent scratches. Remove the protective cover before use.
Show More
10
Tube Headphone Amplifier Kit, 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit AC12V 0.8A
Goshyda
Main Highlights
① Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good. ② Eight 470UF capacitor filter is very clean, excellent power system lead to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise.
③ Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance. ④ Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board.
⑤ This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier.
Instruction: 1, AC 12V Input: using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board. DC power input can not be used, or it will not work. 2, Sound Channel Input: Connected to mobile phone, computer, MP3, MP4 and many other music players.
3, Sound Channel Output: Connected to the audio input of power amplifier. 4, Power Switch/Volume Knob: Rotate the knob anticlockwise to turn down volume, and continue rotating until you hear the sound "tick" to power off. Rotate the knob clockwise until you hear the sound "tick" to power on and continue rotating to turn up volume.
Show More
8.7
Excellent
Check Price
8.7
Excellent
Goshyda
Tube Headphone Amplifier Kit, 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit AC12V 0.8A
Check Price
Show More
Main Highlights
① Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good. ② Eight 470UF capacitor filter is very clean, excellent power system lead to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise.
③ Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance. ④ Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board.
⑤ This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier.
Instruction: 1, AC 12V Input: using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board. DC power input can not be used, or it will not work. 2, Sound Channel Input: Connected to mobile phone, computer, MP3, MP4 and many other music players.
3, Sound Channel Output: Connected to the audio input of power amplifier. 4, Power Switch/Volume Knob: Rotate the knob anticlockwise to turn down volume, and continue rotating until you hear the sound "tick" to power off. Rotate the knob clockwise until you hear the sound "tick" to power on and continue rotating to turn up volume.
Show More
