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For better preamp function, we recommend NS-10P ASIN: B07719G56B. For any questions, please contact us on Amazon. New version adopts 6j3 vacuum & valve tube, which has warmer tube sound and more replaceable tubes.

Stereo input&output: super powerful extension, bluetooth, dvd player, multiple audio sources. Exquisite materials: power amplifier used Aluminum and Metal casing which provided stronger protection.
100w hybrid tube amplifier: 35w 4 ohm / channel& 50w 8 ohm / channel. Metal cutting knob for more delicate control. Front panel has independent Treble/ Bass/ Volume adjustment Knob. Those connection allows you to enjoy the “Tube”Sound. Supplied with a replaceable tubes.

Easy replace tube: tubes can be replaced by 6j1/6j4/ge5654/6aK5/6*1n/ E180F/6ж9П/EF861/6688 tubes etc. High-performance: p2 is a hi-fi tube headphone amp, k702, hd650, q701, k701, 2 x 6k4 j-Grade tubes can easily power high-performance headphones including the HD580, and many more, HD600, recommend 32-600ohm headphones.

Bluetooth 5. 0 qcc3034 supporting aptx-hd lossless transmission. With 3 kinds of audio inputbluetooth/usb/rca and 2 kinds of outputrca/3. 5mm headphone, usb dac or headphone amp with hifi clear, warm, P1 can be used as HiFi tube Preamp, sweet tube sound, dynamic, bringing extremely high-quality listening experience.
Pc-usb cm6642 supporting 24bit 192khz and compatible with windows/mac/Linux system, TV, matching well with many audio devices such as iPod, Phone, Echo Dot, MP3 players, Blu-ray players, CD players, etc.

This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power. This class a single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality with headphone amp function ASIN: B076CC92BX.

4 ma or higher. The best warranty available in the audio tube business. We reject 50% to 60% of the tubes we test. We do not recommend purchasing vintage vacuum tubes unless actual test results are provided with the tubes.
All vacuum tubes sold by riverstone Audio will have the "Riverstone Audio" name, logo and QC label on the boxes***. Test results are provided with all tubes sold by riverstone audio. We have been testing and using vacuum tubes for many years and know what it takes to select the best vacuum tubes for long life low-noise audio applications. The 5654w tubes are noS and were obtained from factory-sealed military surplus boxes. Jan electron tubes - Higher Durability and Life.

Clear quality signal transmission——2. 4ghz band is optimal for guitar wireless system, no interference, low latencyless than 5mS, low noise, over 20 meters transmission distance.

Advanced circuitry design, built-in speakers protection circuit, best for bookshelf/computer/desktop/speakers in your home. Perfectly suited for your desktop or a smaller space in your home or office, 18-month warranty, Aluminum shell to sure high quality, you can return the item if you have any problems.
1. Bravo Audio
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Bravo Audio V2 Class A 12AU7 Tube Multi-Hybrid Headphone Amplifier
#adBravo Audio #ad - Gain control with Japanese ALPS potentiometer. Parallel 3. 5mm and RCA stereo inputs. Includes high-quality Shuguang 12AU7 tube.More information #ad
Brand | Bravo Audio #ad |
Manufacturer | Bravo Audio #ad |
Height | 3.11 Inches |
Length | 1.73 Inches |
Weight | 1.1 Pounds |
Width | 3.11 Inches |
Part Number | V2 |
Model | V2 |
More information #ad
2. Bravo Audio
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BRAVO AUDIO Bravo 1 Deluxe Tube Driven Headphone AMP with Electro-HarmonixTube
#adBravo Audio #ad - Great sounding tube driven headphone amp for IPods and all music sources. Warm and vibrant sound. Bring your music back to life! There is no op amp or ic in this circuit, which can introduce unexpected distortion to the sound.More information #ad
Pure class a amplifier with Audiophile Performance. Upgraded electro-harmonix EH 6922 Tube.Brand | Bravo Audio #ad |
Manufacturer | BRAVO AUDIO #ad |
Part Number | Bravo 1 Deluxe |
More information #ad
3. Nobsound
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Nobsound NS-08E Vacuum Tube Headphone Amplifier Hi-Fi Valve Headphone Amp Stereo Audio Preamplifier
#adNobsound #ad - Prompt and courteous customer service. Ns-08e is a hi-fi tube headphone amp. Upgrade circuit can ensure lower background noise, more powerful bass and more brilliant treble.For better preamp function, we recommend NS-10P ASIN: B07719G56B. For any questions, please contact us on Amazon. New version adopts 6j3 vacuum & valve tube, which has warmer tube sound and more replaceable tubes.
More information #ad
Very solid workmanship. It can also be used as a stereo preamplifier for other amplifiers and active speakers. Cnc aluminum shell with super mini size. It can offer >=1100mw at 32Ω and can drive 18~600 ohm headphones & headsets.Brand | Nobsound #ad |
Manufacturer | Nobsound #ad |
Part Number | 769700919653 |
Model | 769700919653 |
More information #ad
4. INFI Audio
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INFI Audio Hybrid Class AB Tube Amplifier Power Amp with Bluetooth Home Audio HiFi Stereo Receiver Integrated Amp AUX Bluetooth USB Optical Coaxial for Home Theater
#adINFI Audio #ad - If you encounter any problems, please contact our customer service team immediately. Connectable with cd player, smartphone, TV by using RCA & AUX, PC, U disk, Optical and Coaxial. Perfect service: 1year warranty gives you a great shopping experience.Stereo input&output: super powerful extension, bluetooth, dvd player, multiple audio sources. Exquisite materials: power amplifier used Aluminum and Metal casing which provided stronger protection.
More information #ad
Build-in 6h3n: replaceble with 6n3/56706. 3v, old version build-in 12ax7/12at7/12au7random&replaceble 12v, protection cover removable : the use of thickened steel wire meshed for the tube protection cover not only adds protection of the tubes, but also provides cooling performance and user safety.1100w hybrid tube amplifier: 35w 4 ohm / channel& 50w 8 ohm / channel. Metal cutting knob for more delicate control. Front panel has independent Treble/ Bass/ Volume adjustment Knob. Those connection allows you to enjoy the “Tube”Sound. Supplied with a replaceable tubes.
Brand | INFI Audio #ad |
Manufacturer | INFI Audio #ad |
Height | 5.91 Inches |
Length | 10.24 Inches |
Width | 13.19 Inches |
Part Number | INFI Audio-IF-AD05 |
Model | INFI Audio-IF-AD05 |
More information #ad
5. Fosi Audio
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Fosi Audio P2 Headphone Amplifier Vacuum Tube Headphone Amp Mini Hi-Fi Stereo Audio with Low Ground Noise Output Protection
#adFosi Audio #ad - Stereo and preamplify: headphones amp also can be used as stereo preamp, Parallel 3. 5mm and rca stereo inputs, 6. 35mm headphone output, include a 6. 35mm to 3. 5mm adapter.Easy replace tube: tubes can be replaced by 6j1/6j4/ge5654/6aK5/6*1n/ E180F/6ж9П/EF861/6688 tubes etc. High-performance: p2 is a hi-fi tube headphone amp, k702, hd650, q701, k701, 2 x 6k4 j-Grade tubes can easily power high-performance headphones including the HD580, and many more, HD600, recommend 32-600ohm headphones.
More information #ad
Exquisite appearance: small Compact Size, All aluminum alloy shell and come with a 18-month manufacturer's warranty. Excellent sound performance: low ground noise, built-in output protect circuit, no buzzing or ringing noise, Audiophile-level sound quality, exclusively designed for the customers who pursue HiFi sound; and safe for your expensive headphones.Brand | Fosi Audio #ad |
Manufacturer | Fosi Audio #ad |
Weight | 0.55 Pounds |
Part Number | P2 |
Model | P2 |
More information #ad
6. Douk Audio
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P1 Bluetooth 5.0 Vacuum Tube Preamplifier Hi-Fi Valve Headphone Amplifier Wireless Receiver Audio Decoder Preamp USB DAC APTX-HD
#adDouk Audio #ad - Exquisite appearance with proper size, makes it fashionable and attractive, bringing wonderful auditory and visual enjoyment, blue and orange light decorating vacuum tube, very suitable for home and desktop audio system.Bluetooth 5. 0 qcc3034 supporting aptx-hd lossless transmission. With 3 kinds of audio inputbluetooth/usb/rca and 2 kinds of outputrca/3. 5mm headphone, usb dac or headphone amp with hifi clear, warm, P1 can be used as HiFi tube Preamp, sweet tube sound, dynamic, bringing extremely high-quality listening experience.
More information #ad
Adopting ne5532 op amp+classic 47 headphone amp architecture which can drive 32-300 ohms headphones, more convenient to enjoy original sound or obtain more delicate sound with treble and bass control knob, and a bypass switch is specially designed to turn on/off the tone control, adding much fun and higher playability. Pc-usb cm6642 supporting 24bit 192khz and compatible with windows/mac/Linux system, TV, matching well with many audio devices such as iPod, Phone, Echo Dot, MP3 players, Blu-ray players, CD players, etc.
Brand | Douk Audio #ad |
Manufacturer | Nobsound #ad |
Part Number | DZ066 |
Model | DZ066 |
More information #ad
7. Nobsound
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Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted
#adNobsound #ad - Using antimagnetic transformer covers to shield current interference and achieve much lower static noise. Its sound output is full of analog style.This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power. This class a single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality with headphone amp function ASIN: B076CC92BX.
More information #ad
It has a classic and graceful appearance. The bass part is deep and powerful and the vocal part is sweet and intoxicating. The vu meters and vacuum tubes makes it more elegant and attractive.Brand | Nobsound #ad |
Manufacturer | Nobsound #ad |
Weight | 15.25 Pounds |
Part Number | DJ420 & DJ428 |
Model | 4330977234 |
More information #ad
8. Riverstone Audio
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Tested/Matched Pair 2 Tubes 7-Pin GE JAN 5654W Fully-Tested Vacuum Tubes, Riverstone Audio, Upgrade for 6AK5 / 6J1 / 6J1P / EF95, JAN 5654W Platinum Grade Pair
#adRiverstone Audio #ad - These vintage US manufactured GE tubes are Mil. Our experienced engineers match vacuum tubes for BOTH plate current and mutual conductance. Unless specifically permitted by your amplifier manufacturer do NOT SUBSTITUTE FOR ANY OTHER TYPE OF 7-PIN TUBE. We guarantee that the ge 5654w tubes selected for these matched pairs test at NOS levels at or above 4400 micro-mho and a plate current of 6.4 ma or higher. The best warranty available in the audio tube business. We reject 50% to 60% of the tubes we test. We do not recommend purchasing vintage vacuum tubes unless actual test results are provided with the tubes.
More information #ad
4 year warranty - buy with confidence - all vintage vacuum tubes sold by riverstone audio are backed by our no-nonsense 4-YEAR warranty. All tubes we must also pass a specialized life test and an audio sound test. All vacuum tubes sold by riverstone Audio will have the "Riverstone Audio" name, logo and QC label on the boxes***. Test results are provided with all tubes sold by riverstone audio. We have been testing and using vacuum tubes for many years and know what it takes to select the best vacuum tubes for long life low-noise audio applications. The 5654w tubes are noS and were obtained from factory-sealed military surplus boxes. Jan electron tubes - Higher Durability and Life.
Brand | Riverstone Audio #ad |
Manufacturer | GE #ad |
Part Number | Pair (2 pcs) Matched 5654W Vacuum Tubes |
Model | 2PC-GE5654W |
More information #ad
9. JOYO
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JOYO 2.4GHz Wireless Guitar System 4 Channels Guitar Wireless Transmitter Receiver System with Built-in Rechargeable Lithium Battery for Audio Instruments Electric Guitar Bass JW-03
#adJOYO #ad - Long battery life——built-in lithium battery with over 8 hrs battery life once fully charged, enough to enjoy the wireless world in your gig. Easy to pair——turn on the transmitter and the receiver, then press the pairing button of the transmitter for more than 2 seconds, press the pairing button of the receiver, then they're paired successfully.Clear quality signal transmission——2. 4ghz band is optimal for guitar wireless system, no interference, low latencyless than 5mS, low noise, over 20 meters transmission distance.
More information #ad
High compatibility——the plugs can be rotated for 220 degrees, bass, acoustic guitars and other digital music instruments, compatible for most electric guitars, the device are approved for worldwide use. User-friendly——the double-sided USB cable can charge the transmitter and receiver simultaneously, easy to switchover between the 4 signal chennals.Brand | JOYO #ad |
Manufacturer | JOYO Technology #ad |
Weight | 0.37 Pounds |
Part Number | JW-03 |
Model | MANUFACTURER-JOYO-0JW03US |
More information #ad
10. Fosi Audio
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Fosi Audio BT10A, 2021 Upgraded Bluetooth 5.0 Stereo Audio Amplifier Receiver 2 Channel Class D Mini Hi-Fi Integrated Amp for Home Passive Speakers 50W x 2 TPA3116
#adFosi Audio #ad - Home hi-fi integrated amplifier, exclusively designed for the customers who pursue HiFi sound; Ship with power adapter and power cord, you can use directly.Advanced circuitry design, built-in speakers protection circuit, best for bookshelf/computer/desktop/speakers in your home. Perfectly suited for your desktop or a smaller space in your home or office, 18-month warranty, Aluminum shell to sure high quality, you can return the item if you have any problems.
More information #ad
Update 2021 new Model. Bluetooth 5. 0 wireless streaming range up to 50ft15m, with bass and treble control, adopt ti tpa3116D2 chip to get clear and clarity sound, Simple compact design but practical and powerful, no audible noise, dead silent when nothing is playing through it.Brand | Fosi Audio #ad |
Manufacturer | Fosi Audio #ad |
Height | 1.18 Inches |
Length | 4.21 Inches |
Width | 3.43 Inches |
Part Number | BT10A |
Model | BT10A |
More information #ad