597 reviews analysed
1. Riverstone Audio – Tested/Matched Pair (2 Tubes) 7-Pin GE JAN 5654W Fully-Tested Vacuum Tubes – Upgrade for 6AK5 / 6J1 / 6J1P / EF95 – GE 5654W Platinum Grade Pair
- **IMPORTANT** AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE. 5654W tubes should only be used to replace 7-Pin 6J1, 6J1P / 6J1P-EB / 6Zh1P-EV, 6AK5, 6AK5W and EF95 tubes. DO NOT SUBSTITUTE FOR ANY OTHER TYPE OF 7-pin tube.
- TESTED and MATCHED Pair (2 tubes) of low-noise 7-Pin NIB/NOS GE JAN 5654W Vacuum Tubes. Considered one of the best of the 5654 / 6AK5 / EF95 family of tubes for audio use. These vintage US manufactured GE tubes are Mil. Spec. (JAN) Electron Tubes – Higher Durability and Life. These NOS tubes were obtained from factory-sealed military surplus boxes. ***NOTE: All vacuum tubes sold by Riverstone Audio will have the “Riverstone Audio” name, logo and QC label on the boxes***
- BUY WITH CONFIDENCE – All vacuum tubes sold by Riverstone Audio are backed by our no-nonsense 2-YEAR warranty. THE BEST WARRANTY AVAILABLE in the audio tube business. We have been testing and using vacuum tubes for many years and know what it takes to select tubes for low-noise audio applications.
- RIVERSTONE AUDIO utilizes the best available equipment (Amplitrex AT1000) to test and match audio tubes. We do not sell untested tubes – never have and never will. Only the best NOS tubes are selected for Riverstone’s Platinum tested/matched pairs.
- TEST RESULTS are clearly listed on each tube box. Our experienced engineers match vacuum tubes for BOTH plate current and mutual conductance. All tubes we sell must also pass a specialized life test and an audio sound test. We guarantee that the GE 5654W tubes selected for these matched pairs test at NOS levels at or above 4800 micro-mho and a plate current of 7.2 mA or higher. ***Vacuum tubes sold by Riverstone Audio will have the “Riverstone Audio” name, logo and QC label on the boxes***
2. SUCA-AUDIO Tube-T1 Preamplifier, Vacuum Tube Amplifier Buffer Mini Hi-Fi Stereo Preamp with Treble & Bass Tone Control for Home Audio Player (6K4 Tubes)
- ????TUBE PREAMP – The main purpose of this machine is to act as a “buffer” but not a power amplifier. It is NOT a phono preamp for turntable and need to connect to an amplifier or active speaker.
- ????SWEET TUBE SOUND – Vacuum tube preamp will give you a different acoustic enjoyment with dynamic, sweet tube sound enjoyment. You can feel improve of sound quality in your home theater, HIFI system and any streaming media.
- ????TUBES REPLACEABLE – The 3D sound quality of a good tube implementation is simply divine! Tubes detachable design, you can swaps the tube to tweaking the sound, 6j1,6j2,6J4,GE5654,6AK5 and 6*1n tubes are fit for this preamp.
- ???? NO NOISY NO BUZZING – The power and audio circuits are completely separated to minimize the interference. Specially design adapter for Tube-T1 preamp with low ripple factor, will not cause a hum when using.
- ???? WORTH PLAYING – Features in volume, treble and bass control knobs for more delicate adjustment of the sound, much fun and high playability with this function, the best choice for either beginner or audiophile.
3. Nobsound HiFi 6J1 Vacuum Tube Preamplifier Stereo PreAmp Digital Treble&Bass Tone Control (Silver)
- Notice: ① Preamplifier needs to work with amplifiers or active devices; ② Not PHONO preamp and can’t be used for record players
- Audio signal input end can connect to the computer, CD, phone and other player for lossless audio
- The output end can connect to the digital amplifiers, active multimedia audio devices.
- With treble and bass adjustment function; No background noise
- Gold-plated for input and output terminals; 6J2 valve tube; Black version ASIN: B01NBM7K8L
- Please note that this product is a preamplifier. It is not an amplifier and needs to be connected with an amplifier or active audio devices. Also, it is not a phono preamp and can’t work with a turntable.
- For noise issue:
- There is a large probability that the low-quality audio cable causes the static noise.
- Please make sure the sound source is fine since tube amplifiers will amplify all sound including the noise.
- Please check whether the tubes are plugged well on the tube sockets or not.
- Devices like routers, mobile phones will also interfere in the audio signal and may cause static noise.
- If your problem can’t be solved, please feel free to contact us. We will be very glad to help you and try our best to make you satisfied.
- Audio input: RCA input * 1 group
- Audio output: RCA output * 1 group
- Power DC input: 12V input
- Aluminum shell, CNC processing
- Laser carving characters
- Color: Black / Silver
- Size (W*H*D): 100*70*150 mm / 3.94*2.76*5.91 in
- Weight: 0.5 Kg / 1.1 lb
- 1 * Digital Audio Preamp
- 1 * 12V Power Supply
4. Fosi Audio P1 Tube Pre-Amplifier Mini Hi-Fi Stereo Buffer Preamp 6K4 Valve & Vacuum Pre-amp with Treble & Bass Tone Control for Home Theater System
- 🍎 NOTE: This is a preamplifier, not a power amplifier or phono preamp, can’t be used for turntables or passive speakers.
- RCA input to the computer, CD, phone, iPod and other player and RCA output to the digital amplifiers, active multimedia audio devices for lossless audio(The RCA cables not included).
- Small compact design, with optimal integrated circuit to get powerful, dynamic and sweet sound. Tubes can be replaced by 6K4,6AK5,EF95, 5654,403B tubes.
- This pre-amp improves everything detail, transparency, immediacy, richness, tone associated with your music.
- Built-in Switch impact protection circuit and overheat protection circuit, long life span of this unit. All aluminum alloy shell and come with a 18-month manufacturer’s warranty.
5. Nobsound NS-02E Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Pre-Amp DIY (Black)
- The Nobsound NS-02E can provide soft and warm sound while maintaining its exceptional clarity.
- The default tube is 6N3, which can be easily replaced with 6A8Q, 2C51, 5670, 5185, 6385, 6185, WE396, ECC 42, 6H3N, 6H3II, ECF82, 6CC42.
- The Nobsound NS-02E can be paired with your preamp, smart phone, computer, iPod, stereo system, and other audio device as well as your favorite headphones.
- The Nobsound NS-02E can also be used as a tube pre-amplifier.
- The affordable price makes both Hi-Fi freshmen and Hi-Fi veterans can enjoy it.
6. Nobsound NS-10P Mini Vacuum Tube Preamp Audio Hi-Fi Stereo Pre-Amplifier Treble & Bass Control
- Notice: ① Preamplifier needs to work with amplifiers or active devices
- ② Not PHONO preamp and can’t be used for record players
- Excellent sound performance
- No background noise
- Warm and soft tube sound
- Sound quality enhancement
- Pure tube preamplifier
- Suitable for all amplifiers and music types
- With independent treble, bass and volume control
- Vacuum tubes can be replaced by various models
- Mini size and exquisite appearance
- CNC aluminum shell and front panel
- Blue tube light
- Mellow and solid touch feeling
7. FX AUDIO Home Audio GE5654 Tube Preamp—Sound Quality Upgrade Electronic Hi-Fi Stereo Vacuum Tube Preamplifier with Bass & Treble Control DC12V Power Supply for Home Audio Player (Black)
- ♪ HIGH QUALITY MATERIALS—The chassis of the preamplifier is made of a solid aluminum alloy material, and uses accurate and stable integrated circuits and high-quality components to eliminate low-frequency noise and ensure clear sound quality
- The material of its PCB board is made of FR-4 insulation board and black immersion gold Craft, which has the characteristics of stable signal, high temperature resistance, long service life, and not easy to be oxidized.
- ♪ EXQUISITE APPEARANCE DESIGN—FX AUDIO pre-amplifier has a mini exquisite appearance and light weight, easy to carry around, its brushed texture surface and high-quality tube combine to appear more fashionable,elegant and Classical.
- ♪ SEPARATE CONTROL OF BASS&TREBLE—The vacuum tube preamplifier can independently adjust the bass and the specific proportion components in high-frequency sound to perfectly achieve HiFi effects. At the same time it can maximize the rendering of an atmosphere like being in a music performance to satisfy your experience of different sound styles in pursuit sound quality.
- ♪ RCA INPUT & OUTPUT—From RCA output ,the preamp can also be directly connected to the audio source and active multimedia audio equipment or indirectly connected to passive audio through the power amplifier(The item includes RCA cable).
- ♪ NOTE—The item just is a tube preamp, not a power amplifier or phono amplifier. Because it is a household circuit design, the home theater tube preamp can not be used in cars, turntables or passive speakers, nor can it directly work for headphones, speakers and can not be used as a phono amplifier.(Only suitable with 12V power cord).Package Include: 1 x tube preamp, 2 x 5654 tubes,1 x power supply, 1 x RCA cable,1 x user manual, 1 x security card/1 year warranty
8. HiFi Vacuum Tube Preamp Stereo Mini Class A Audio Preamplifier for Power Amp
- With standard stereo RCA input, compatible with many audio devices such as phone,TV, MP3 players, CD players, DAC, computers etc. Connected between audio source and power amplifier to effectively filter the digital sound, making the human voice more real.
- Reasonable and simple curcuit layout, the sound is clear with low noise, adopting 2PCS 6J1 vacuum tubes. The tube buffer is amplified by about 2 times, the sound is warm and sweet, full with dynamic. Pluggable tube socket design, easier to change GE5654 tubes and upgrade the sound.
- Mini size with exquisite appearance, acrylic chassis looks great when the tubes are giving out blue light, very suitable for home / office desktop audio system use.
1. This is preamp, cannot drive passive speaker directly, need to be used with power amplifier.
2. Default 6J1 vacuum tubes, if you want upgraded US GE5654 tubes please visit:
3. Cannot input DC voltage, or else it will not work or damaged directly.
With standard stereo RCA input, compatible with many audio devices such as phone,TV, MP3 players, CD players, DAC, computers etc. Connected between audio source and power amplifier to effectively filter the digital sound, making the human voice more real.
Reasonable and simple curcuit layout, the sound is clear with low noise, adopting 2PCS 6J1 vacuum tubes. The tube buffer is amplified by about 2 times, the sound is warm and sweet, full with dynamic. Pluggable tube socket design, easier to change GE5654 tubes and upgrade the sound.
Mini size with exquisite appearance, acrylic chassis looks great when the tubes are giving out blue light, very suitable for home / office desktop audio system use.
Audio input: stereo L/R RCA
Audio output: stereo L/R RCA
Number of Channels: 2.0
Output impedance: 4-8Ω
Working voltage: AC 12V
Dimensions(W*D*H): 81*81*43mm / 3.19*3.19*1.69in
Net weight: 170g / 0.37lb
Package weight: 560g / 1.23lb
1*AC 12V Power Adapter
9. M-Fire Car Preamp Vacuum Tube Amplifier Buffer Miniskirt Preamplifier
6J1 Preamp Vacuum Tube Amplifier Buffer Miniskirt Preamplifier
Using classic tube 6j1 design and optimize the route.
Tube can be replaced design, diffuse voice.
Patent power conversion module.
Response frequency: 20 HZ (-0.2DB) -20 KHZ (-0.2DB).
Input sensitivity: 300MV-2000MV.
By our suggestions above, we hope that you can found Vacuum Tube Amplifier Buffer for you.Please don’t forget to share your experience by comment in this post. Thank you!