10 best tube headphone amps

A tube headphone amplifier, often referred to as a tube headphone amp, is a type of audio amplifier that incorporates vacuum tubes (also known as electron tubes or thermionic valves) in its design to amplify audio signals. These amplifiers are typically used to enhance the audio quality of headphones, delivering a warm, rich, and often vintage sound characteristic associated with tube-based audio equipment. Here are some key aspects to know about tube headphone amplifiers:

Tube Technology: Tube amplifiers use vacuum tubes as their amplification components instead of solid-state transistors, which are more common in modern amplifiers. Vacuum tubes create a unique sound profile characterized by harmonic distortion that many audiophiles find pleasing.
Sound Character: Tube headphone amplifiers are known for their warm and "analog" sound quality. They often produce a smoother and more natural audio output, which some people prefer for certain types of music, such as jazz or classical.
Amplification Power: Tube headphone amps come in various power ratings, from low-power models suitable for high-efficiency headphones to more powerful units that can drive demanding, high-impedance headphones. It's essential to match the amplifier's power output to your headphones' requirements for optimal performance.
Headphone Compatibility: Different tube headphone amps may be better suited to specific types of headphones, particularly those with different impedance levels. Make sure to choose an amplifier that matches the impedance of your headphones to achieve the best sound quality.
Design and Aesthetics: Tube headphone amplifiers often feature visually appealing designs with exposed tubes, giving them a retro or vintage look. This aesthetic can be a selling point for enthusiasts who appreciate the combination of both function and form.
Price Range: Tube headphone amplifiers vary widely in price, depending on factors such as build quality, the number of tubes, and brand reputation.High-end models can be quite expensive, while more affordable options are also available.
Additional Features: Some tube headphone amps may include features like tone controls, multiple inputs, and preamp capabilities, allowing them to serve as the centerpiece of a home audio system.
Maintenance: Vacuum tubes have a limited lifespan and may need to be replaced periodically, typically after several thousand hours of use. Replacement tubes are available and can be swapped out relatively easily.

In summary, tube headphone amplifiers are favored by audio enthusiasts for their distinctive sound characteristics and vintage appeal. They are available in various designs, price ranges, and power ratings, making it important to choose one that matches your specific headphone and audio preferences. However, it's worth noting that while tube amps have their unique qualities, they may not be the best choice for all types of audio applications or personal preferences.

Below you can find our editor's choice of the best tube headphone amps on the market

Headphone Amplifier Vacuum Tube Headphone Amp Mini Hi-Fi Stereo Audio with Low Ground Noise Output Protection Fosi Audio P2

Based on 84 reviews Check latest price

Product description

Specifications:

Tubes: 6K4 × 2

OP-amp: NE5532

Audio Input: 3.5mm Audio jack, Stereo L / R RCA

Audio Output: 6.35mm

Headphones Maxpower output: 600 mW / 62Ω, 900 MW / 32Ω, 1 W / 16Ω

Frequency range: 20Hz-20 kHz (± 3dB)

THD: ≤0, 03%

Matching headphone impedance: 32-600 Ω

NR: ≥ 95db

Operating voltage: DC12V

Input sensitivity: 0.2mV

Dimension: L99 * W98 * H33 mm

Net weight: 0.25 kg

Model direct replacement tube: 6j1, 6AK5, EF95, 5654, 403B etc.

Packing List:

1 * headphone amplifier

2 * 6J4 vacuum tubes

1 * DC 12V Power Supply

1 * 6.35mm to 3.5mm Adapter

Tips:

1. When you use this product for a long time,please do not touch it by your bare hand, it may hot,but please don't worry this is a normal phenomenon.)

2. Please plug the power supply after all the connection been done for safety;

3. We recommend using 32~600Ω headphones, while armature earphones and headphones that have low resistance and high sensitivity are not suitable.

4. For noise issue, please keep it away from devices like routers, mobile phones or something that may interfere in the audio signal.

5. Please make sure the tubes completely pushed into the device, incompletely connection will cause noise or poping sound.

❤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
❤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;
❤High-performance: P2 is a Hi-Fi tube headphone amp, 2 X 6K4 J-Grade tubes can easily power high-performance headphones including the HD580, HD600, HD650, K701, K702, Q701, and many more, recommend 32-600ohm headphones
❤Easy replace tube: Tubes can be replaced by 6j1/6J4/GE5654/6AK5/6*1n/ E180F/6ж9П/EF861/6688 tubes etc
❤Exquisite appearance: Small Compact Size, All aluminum alloy shell and come with a 18-month manufacturer's warranty.

User questions & answers

Question:	What are some good replacement tubes for this
Answer:	I think the GE 5654W tubes are a good replacement for this amp. https://www.amazon.com/dp/B087LXW6RL?ref=myi_title_dp
Question:	Was everyone satisfied with the quality of the vacuum tubes provided? If not, what might be a worthwhile upgrade
Answer:	I've sampled Brimar 5749's and GE 5654's and the ones that came with -- the differences are subtle (the tubes on this are only for the pre-amp stage) -- no complaints for the $50 price tag -- it's as good as any headphone amp I've tried under $150 and mine has been working perfect for over a year
Question:	Can the fosi t2 headphone amp work with the fosi Q5 dac
Answer:	Assuming you mean the p2 headphone amp, yes, it will. You'll need an RCA cable to connect the two.
Question:	This will work so i can listen to my record player with my headphones
Answer:	Hello, if your record player has a built-in preamp circuit, you can use this tube amp to listen to your record player with your headphones. If your record player does not have a built-preamp circuit, you need a phono preamp. You can choose Fosi Audio Box X2 phono preamp: https://www.amazon.com/dp/B07XNTHHBP Hope this can help you. Thanks.

Product features

WHY YOU'LL LOVE IT

Tube-P2 will bring you different hearing enjoyment. You wouldn't expect headphones to need any special equipment to work. You plug them in, turn your device on, and music comes through. But what if you don't just want to listen to your music? What if you truly want to hear it? You'll need something to increase the level of signal that reaches your ears: a good tube headphone amp.

SPECS

OP-amp: NE5532
Audio Input: 3.5mm Audio jack, Stereo L / R RCA
Frequency range: 20Hz-20 kHz (± 3dB)
THD: ≤0, 03%
Matching headphone impedance: 32-600 Ω
NR: ≥ 95db
Operating voltage: DC12V
Input sensitivity: 0.2mV
Dimension: L99 * W98 * H33 mm
Net weight: 0.25 kg

Nobsound NS-08E Vacuum Tube Headphone Amplifier Hi-Fi Valve Headphone Amp Stereo Audio Preamplifier

Based on 559 reviews Check latest price

NS-08E is a Hi-Fi tube headphone amp. It can offer >=1100mW at 32Ω and can drive 18~600 ohm headphones & headsets.
New version adopts 6J3 vacuum & valve tube, which has warmer tube sound and more replaceable tubes.
Upgrade circuit can ensure lower background noise, more powerful bass and more brilliant treble.
It can also be used as a stereo preamplifier for other amplifiers and active speakers. For better preamp function, we recommend NS-10P (ASIN: B07719G56B).
CNC Aluminum shell with super mini size. Very solid workmanship. Prompt and courteous customer service.18-month warranty and life technical support. For any questions, please contact us on Amazon.

User questions & answers

Question:	What is the difference between a tube amp and a dac/amp combo
Answer:	Not from my knowledge no. There's just an input on the back of the cab. With other cabs it may be possible though.
Question:	Can the line/headphone out be connected to powered speaker
Answer:	Mine did not come with a speaker cable. Please note that an 'instrument' cable is needed rather than a regular guitar cable.
Question:	Would this work for the audio-technica ath-m50x headphones
Answer:	It comes w/ jumper cable from head to speaker. Then you’ll need a guitar cable to go from instrument to head unit. I would recommend you buy head unit separate and get a larger speaker than the 8”. It’s loud but doesn’t sound as good as a 10 or 12
Question:	Is this a true 100% tube driven amp? Most Nobsound amps use tubes for pre-amp and use transistor amplification, rendering the tubes useless
Answer:	The head yes but the cab no. It gets really loud but sounds pretty bad through 8” speaker. Buy the head separate and get a 12” cab

Product features

Powerful Drive & High Sound Quality

NS-08E is a Hi-Fi tube headphone amp. It can offer >=1100mW at 32Ω and can drive 18~600 ohm headphones & headsets.
Upgrade circuit can ensure lower background noise, more powerful bass and more brilliant treble.
It can also be used as a stereo preamplifier for other amplifiers and active speakers. For better preamp function, we recommend NS-10P (ASIN: B07719G56B).

6J3 Vacuum & Valve Tube

New version adopts 6J3 vacuum & valve tube, which has warmer tube sound and more replaceable tubes.
Full List of Replacement Tubes: 6J1, 6ж1П, 6AK5, 6BC5, 403A/B, 5654, EF40, EF95, CV850, 6J2, 6ж2П, 6AS6, CV2522, EF11/732, CV4011, 6J3, 6ж3П, EF96, CV848, 6BC6, 6AG5, 6J4, 6ж4, 6136, 6BX6, 6AC7, EF94, 6AU6, 6J5, 6ж5П, EF80, CV2521, 6F36, 6AH6, 6AN5, 6K4, 6K5, 6K4П, 6BA6, 6DA6, EF89/93, 5749

Mini Size & Solid Shell

CNC Aluminum shell with super mini size. Very solid workmanship.

Product Details

Output power: ≥1100 mW (32 ohm)
Headphone Adapter Impedance: 18-600 ohm
Total harmonic distortion: <0.005%
SNR: ≥110 dB
Frequency Response: 20 Hz - 30 kHz
Size: 111*69*32 mm / 4.37*2.72*1.26 in (Height: 73 mm with vacuum tube installed)
Net Weight: 185 g / 0.41 lb
Power supply: Input voltage: AC 100-240V 50/60 Hz; Output voltage: DC 6V 2000Ma

Notice:

Please turn on the amplifier for about 15 seconds before you connect the audio source and put on the headset.
We recommend using 24~600Ω headphones, while armature earphones and headphones that have low resistance and high sensitivity are not suitable.
As there will be tube Microphone effect, please keep the amplifier steady while using it.
For noise issue, please keep it away from devices like routers, mobile phones or something that may interfere in the audio signal.
If there are no interference, please remove all input and listen to see if the noise still exists.

Little Bear B4-X Portable Dual-Mono Vacuum Tube Headphone Amplifier; Mini Balanced Audio Headphone Amp B4 Upgrade Version

Based on 190 reviews Check latest price

Product description

Parameters:

Tube: USA RAYTHEON JAN5899 ×2

Op amp: NE5532*2 (can be upgraded )

Lithium Battery: 12V, 1000mA

Charging time: 2-2.5 hours

Working time: 4-4.5 hours

Output power: 450mW

SNR: 105dB

Suggest load impedance: 16-300Ω

Output: 2.5 balanced Jack*1, 3.5mm Jack *1

Size (L*W*D): 115*69*23 mm / 4.5*2.7*0.9 in (without knobs)

Packing List:

1× headphone amplifier

1× power supply

1× 3.5mm audio cable

2× band

Notice:

When using B4-X with your cellphone, if you heard some "zhi ~ zhi" noise in your headphone. Probably it is the inteference from your cellphone such like WIFI or 4G signal, which intefers the tube and cause noise. That's normal. Because there are microphone effect with all tubes. To avoid it, please keep your cellphone far away from B4-X.

Q&A:

Q: Tried different source and headphones, but the right channel still has static.

A: Maybe the tube has a poor contact after long shipping process, open the chasis and adjust the screw near the tube while listening (if you cannot find it, contact us and we will give you a photo with marks to help you). Maybe the tube is broken, you can buy a 5899 tube in local shops. And we will refund you the cost.

Q: It broke just now four loud pops and it's doesn't work now.

A: Mainly because the battery is run out of power. Please charge it. If no help, please contact us.

Q: The Amp has a lot of electronic feedback/interference when a cellphone is nearby. It creates popping in the headphones.

A: Vacuum tubes are easy to be interfered by devices that can transfer siganl like cellphones, routers. Please keep the amp away from them.

Q: It cannot be charged, something is loose inside the charger.

A: Maybe the charger is broken. Contact us to get a new one please.

The difference between B4 and B4-X: ① B4-X is a dual-mono balanced version. Its left and right channel are amplified by independent components, and power supply, tubes, and op amp are all independent and symmetric. So the degree of sound separation is higher than B4.
② B4-X adopts 2 groups of independent power supply(+12V and -12V) for 2 op amps, less mutual effects and can drive 300Ω headphones. ③ The circuit adopts dual op amp parallel output, with higher output power. ④ B4-X has 3.5mm and 2.5mm 2 kinds of output interface, suitable for most of balanced and standard headphones.
Mini size and unique design: built-in tube makes you have a tube amplifier which can be held by one hand, convenient to carry and can enjoy HiFi music everywhere. Full, delicate and soft sound: warmer than transistors, independent op amp and power supply inhance the SNR and degree of separation, less interplay and higher sound quality.
With built-in battery protection circuit: battery lets your listening feast without time limitation. It can't be turned on during charging and will power off automatically after fully charged, and charger LED will turn to green.
High-end making material and craft: using gold-plated socket, original nichicon electrolytic capacitor, original DALE resistors and precision ring resistance. Prompt and courteous customer service.

User questions & answers

Question:	Why does mine not work?.after charging it,the tube doesnt light up and no sound
Answer:	Make sure all the connection from the wall to the unit is properly connected and secured.
Question:	Is it okay to stick a piece of paper over the circuit board? The yellow is an eyesore
Answer:	The "yellow" color is the copper circuits themselves, which is the main selling point of the product. If you don't want to see the retro design of circuits or tubes, buy a different product.
Question:	Anyone compare the sound quality of the little bear with a more expensive or non portable tube amp? Thoughts
Answer:	I have the Valhalla 2, but it doesnt have the traditional "tube sound". However, what I can say, I have the DT990 and I hate the way it sounds from the Valahalla 2. This amp though, tames it in such a pleasing way. Now, along with those, I use the HD600 primarily for listening. The Valhalla 2 has amazing synergy with them. It tightens it up and make them sound amazing. For portability, I have tried the HD600 with this one as well. It sounds a bit more laid back and closer to what youd expect from tubes with PLENTY of volume. TL;DR: For the price, this little amp is pretty great.
Question:	Can it play audeze lcd2c and dt
Answer:	Don't know, but it does well with dt 990.

FiiO E10K USB DAC and Headphone Amplifier (Black)

FiiO

Based on 3 reviews Check latest price

Product description

The E10K USB DAC high resolution Headphone Amplifier from Fiio is customizable and designed to improve your laptop's audio output quality via its PCM5102 DAC chip and is capable of handling PCM files in up to 24-bit, 96 kHz resolution. It features a selectable bass boost and low-pass filter, both with circuitry optimized for a low noise floor when engaged, allowing you to customize the sound of your audio to your tastes.The unit connects to your laptop via its Micro USB connection, which also provides it with power. It offers a variety of connections, including a front-panel 1/8\" headphone jack, a rear-panel 1/8\" line output, and a rear-panel coaxial digital output, which allows you to send your digital audio to another destination. DAC ChipThe internal DAC chip is a PCM5102 and can handle PCM files up to 24-bit/96 kHz while improving audio quality through via a linear internal filter, reduced delay and internal silence on changing tracks, and no phase shifts.Low Noise Floor The unit has an optimized low-pass filter and selectable bass boost circuit that are designed for a low noise floor in all states.Amplification Stage The E10K features a LMH6643 op amp, which is designed for transient response and driving power.Portable DesignA brushed aluminum shell and chassis allow for durable portable use.

DAC Chip¡ªThe Internal DAC chip is a PCM102 and can handle PCM files up to 24-bit/96 kHz while improving audio quality via a linear filter, reduced delay and internal silence on changing tracks, and no phase shifts.
LOW NOISE FLOOR ¡ª The unit has an optimized low-pass filter and selectable bass boost circuit that are designed for a low noise floor in all states.
CONNECTION VARIETY ¡ª The variety of connections include a front-panel 1/8¡± headphone jack, a rear-panel 1/8¡± line output, and a rear-panel coaxial digital output, which allows you to send your digital audio to another destination.
USB CONNECTION ¡ª Connects to your laptop via its micro USB connection, which also provides it with power.
PORTABLE DESIGN ¡ª A sleek, brushed aluminum shell and chassis allow for durable, portable use.

User questions & answers

Question:	I want to use this for my Audio Technica M50xs. Worth it
Answer:	Yes
Question:	What's the Difference with the E10K & E10? I loved my E10 but it's starting to fail, so I'm looking for a new one
Answer:	Yes, unfortunately.
Question:	What outputs does it have? I see only one headphone out (small jack). Does it perhaps have RCA in the back
Answer:	I have mine connected to my headset and the back is connected to my speakers. Sound will play from both if you have both devices on
Question:	so you plug this in any usb port and voila?, how do you eq
Answer:	That's what I use the Dragonfly (Black) for. I expected a subtle improvement, but found it to be night and day! The cheapo DAC and output stage circuitry that's built into the laptop was really limiting the sound quality.

Dilvpoetry SMSL SP100 Vacuum Tube Headphone Amplifier Replaceable 6N3 Buffer HiFi Stereo Audio Desktop Amp Preamplifier Preamp (Black)

Based on 47 reviews Check latest price

♫ 6N3 VACUUM TUBE AMPLIFIER: SMSL SP100 use military grade 6N3 tube and carefully tuned circuit. Easy to replace and upgrade. The tubes can be replaced by other similar model tubes to enjoy different sounds.
♫ HEADPHONE AMPLIFIER: High current, low THD+N 0.018% parallel OPA NE5532 headphone drivers. With 6.35mm headphone jack and 3.5mm headphone adapter. Maximum support 300Ω-21mW x 2.
♫ LOW GROUND NOISE AMP: There's no buzzing or ringing when you use our amp. Using the MCU controls the mute to avoid Avoid the impact sound of on/off damage the headphones. Uses thte Japanese TOCOS Volume Potentiometer.
♫ DESTOP MINI PREAMPLIFIER: Aluminum CNC housing with stylish design. Acrylic front panel, simple and nice tube amplifier. With high efficiency low noise power supply DC12V.
♫ ONE YEAR WARRANTY: Please buy it with confidence. We offer 24 Hours after-sales service,1 year repair warranty and 30-day money back guarantee as well.

User questions & answers

Question:	is it hard to replace the tube? do i need to open the unit or just pull it out
Answer:	Till the light goes off around 2 hrs
Question:	Can these push 300 ohm headphones
Answer:	I have not yet tried .
Question:	Can i connect active speakers to the smsl sp
Answer:	it takes power from the computer via USBC. You can also plug a USB-C power adapter into it, it'll help charge your computer.
Question:	Can you recommend a tube upgrade from the stock 6N3? Thanks
Answer:	Sorry. Don’t know the answer

Product features

SMSL SP100 Tube Headphone Amplifier

SMSL SP100 is a tube headphone amp, which uses NE5532 classic chip and 6N3 tube and get warm and smoother sound.

SP100 can support maximum 300Ω-21mWx2 power, and can drive 32~600 ohm headphones & headsets, dual Op Amp Parallel Headphone Input,with 6.35mm headphone out. Also compatible with 3.5mm headphone with a adapter jack.

SMSL SP100 is custom-made, unique, exquisite, and desktop, It is designed for everyone who loves HiFi, audiophiles and beginners.

6N3 Tube headphone amplifier

6N3 Tube headphone amplifier：SMSL SP100 is vacuum tube amplifier for hifi headphones and headsets, adopt 6N3 tube to get extra oomph and sound smoother. 6N3 tube can be replaced.

User-friendly

Volume is adjustable in one simple button,visualized LED digital screen,Japanese TOCOS Volume Potentiometer,better control of current, voltage and resistance.

Dual Op Amp Parallel Headphone Input

Input: RCA

Output: RCA; 6.35mm headphone out, with 3.5mm headphone adapter.maximum support 300Ω-21mWx2.

Classic Audio Amplifier Chip

Use ne5532 board,dual Low-Noise High-Speed Audio Operational Amplifier,integrated amp for headphones and also preamplifier.

To make everyone enjoy Hi-Fi fun with SP100

It can work with DAC decoder for better amplifier function, we recommed M100 as the back end of the decoder SMSL-M100 (ASIN:B07KM2S4HB).

Inputs Source: DAC, Laptop, PC, Phone

Outputs can be connected to amplifier, 6.35mm or 3.5mm headphone amplifiers.

Using instructions:

1. Try several times to test SP100, time is necessary for the amplifier to release its’ full performance;

2. We recommend using 32~600Ω headphones, while armature earphones and headphones that have low resistance and high sensitivity are not suitable.

3. SP100 is pure tube amplifier, which need connect with a DAC to better the sound quality.

Tips:

1. For noise issue, please keep it away from devices like routers, mobile phones or something that may interfere in the audio signal.

2. Please make sure the tubes completely pushed into the device, incompletely connection will cause noise or poping sound.

Warning:

After a long time of operation, the tube surface temperature is high and it will be hot. Do not touch it directly.

P1 Bluetooth 5.0 Vacuum Tube Preamplifier Hi-Fi Valve Headphone Amplifier Wireless Receiver Audio Decoder Preamp USB DAC APTX

Based on 355 reviews Check latest price

P1 is a Bluetooth vacuum & valve tube preamplifier and headphone amplifier. Headphone output is 160mW @32Ω and is suitable for 32~300Ω headphones and headsets.
Classic 6J5 vacuum & valve tube can provide warm retro tube sound. It can be replaced by 6J1, 6J4, GE5654, 6AK5, 6Ж1n-EB.
It supports Bluetooth/USB/RCA inputs from various devices like iPod, Phone, MP3, TV, Blu-ray players, Echo Dot, CD players, computer etc.
Bluetooth 5.0 supports APT-X, APT-X LL lossless transmission. PC-USB supports 24bit 192KHz and is compatible with Windows/Mac/Linux system
Treble & bass control can achieve different sound style. Bypass function can suspend the tone control circuit to achieve purer music experience.

User questions & answers

Question:	Can this pre-amp stay on for long periods of time without damaging the tubes? Or can the tubes be switched off & still pass through to my amp
Answer:	Tubes last around 5000 hours. They can be on all the time.
Question:	Can you run this amp with powered speakers
Answer:	Confirmed working fine with JBL Professional LSR310S Powered Subwoofer and JBL LSR305 powered monitors. Sound does seems a bit tinny, perhaps better tubes would help.
Question:	Is this a DAC as well as a preamp
Answer:	Description states a CM6642 dac. How it's wired up will make a difference, have one on order.
Question:	Can I send audio out from the rear usb port into a computer usb to make recordings on audacity
Answer:	No. the USB port is only for power and receiving data from the PC. It does not send data to the the PC at all.

Product features

Parameters

Chip Architecture: CM6642+QCC3008+NE5532+classic 47
PC-USB Input Sampling Frequency: 192K/24Bit
THD: 0.01% , SNR: 103dB
PC-USB System supported: XP/W7/W8/W10/MAC/Linux
Bluetooth VER: 5.0
Headphone matching impedance: 32-300Ω
Headphone Max power output: 160mW 32Ω load
Bass & Treble Range: ±6dB
RCA output level: 2.3V
Frequency Range: 20Hz-20kHz(±3dB)

Bluetooth / USB / RCA Inputs & Preamplifier & Headphone Amplifier

Bluetooth vacuum & valve tube preamplifier and headphone amplifier
Headphone output is 160mW @32Ω and is suitable for 32~300Ω headphones and headsets
Support Bluetooth/USB/RCA inputs from various devices like iPod, Phone, MP3, TV, Blu-ray players, Echo Dot, CD players, computer etc
Bluetooth 5.0 supports APT-X, APT-X LL lossless transmission
PC-USB supports 24bit 192KHz and is compatible with Windows/Mac/Linux system

Warm Tube Sound & Replaceable Vacuum Tube & LED Selector

Classic 6J5 vacuum & valve tube
Warm retro tube sound
Can be replaced by 6J1, 6J1, 6J4, GE5654, 6AK5, 6Ж1n-EB
Tube light selector (blue / orange)

Treble / Bass Control & Bypass Function

Support treble and bass control
Bypas function (tone control can be turned off to achieve purer music experience)
Bluetooth / USB / RCA input selector

Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Headphone Amplifier Handcrafted (with Headphone Amp Function)

Based on 36 reviews Check latest price

This Class A single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality. This version has headphone output, which suits for 32Ω-600Ω impedance all kinds of headphones. The toggle on the front panel is to switch between speaker and headphones. Please connect your speakers (both 4Ω and 8Ω) to 8Ω and 0Ω posts.
This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power.
Using antimagnetic transformer covers to shield current interference and achieve much lower static noise.
Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.
It has a classic and graceful appearance. The VU meters and vacuum tubes makes it more elegant and attractive.

User questions & answers

Question:	I want to buy a pair of klipsch 160m’s. How do I know this unit can handle 100rms
Answer:	Yes. The cable is short, but it works.
Question:	OK, maybe I'm stupid but why does it say 2 tube when it shows 7 tubes
Answer:	Hmm that doesn’t sound right. I don’t actually understand how the battery life can be as good as it is on mine. I use it at least an hour and Up to 4 or five hours a day and rarely need to charge it. Not even once a week, I think. The battery life is forgettably good. I don’t know how you’re reading 50% battery, but 5 hrs doesn’t seem long enough at all. May be a lemon - contact them
Question:	My paradigm premier spkrs have an efficiency rating of 90 to 91 ddb at i watt input. should this tube amp satisfy my normal listening level of 95 des
Answer:	Yes its loud but I've found that the battery does not last very long at high volume.
Question:	Can you recommend a tube amp that will power a large pair of boze speakers (100/channel
Answer:	Yes it is

Product features

Parameters

Retro Classic Vacuum Tube

5U4C * 1 + 6H8C * 2 + 6P1 * 4
Vacuum tubes can offer warm retro analog sound unlike normal digital sound.

Hand Welding & Better Sound Quality

Totally hand welding can decrease sound losses and ensure better sound quality.
Its transformers adopt parallel output design, which achieve only half resistance. It has doubled power and still keeps the features of>

Luxury Components & Multiple-Paint Transformer Shield

This amp adopts 150µV 450V Hi-Fi level BC Components high voltage capacitors.
Multiple-paint transformer shield can avoid current interference, which can get lower background noise.
Sound quality is more natural and warmer.

Gold-Plated Pure Copper Terminals

Adopts gold-plated pure copper terminals.
Speaker out binding posts can accept banana plugs and bare speaker wires.
The toggle on the front panel is to switch between speaker and headphones. Please connect your speakers (both 4Ω and 8Ω) to 8Ω and 0Ω posts.

Nobsound NS-02E Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Pre-Amp DIY (Black)

Based on 44 reviews Check latest price

Product description

Why us?

The Nobsound NS-02E designed by Douk Audio Studio is a powerful Hi-Fi headphone amp. It has an anodized aluminum chassis with a replacable vacuum tube shining blue illumination on the top. The Nobsound NS-02E can provide soft and warm sound while maintaining its exceptional clarity. Most importantly, the affordable price makes both Hi-Fi freshmen and Hi-Fi veterans can enjoy it. And that's exactly one of our targets.

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. It can easily power high-performance headphones including the HD 580, HD 600, K 701, K 702, Q 701, DT880, T70, T90, SR225, SR325, RS1e. It will also be a good match for active speaker systems.

The Nobsound NS-02E can also be used as a tube pre-amplifier. You can connect it with any types of power amplifier to upgrade the musicality and dynamic of the original system.

What's more, its high playability can provide more pleasures for you. The default tube is 6N3, which can be easily replaced with various types of tube as below:

United States: 6A8Q, 2C51, 5670, 5185, 6385, 6185, WE396
Europe: ECC 42
Soviet Union: 6H3N, 6H3II
Germany: ECF82
Czech Republic: 6CC42

Definitly, you will always find a place for it in your stereo system.

Specifications:

Tube: 6N3
Output power: ≥1100 mW (32 ohm)
Adapter Headphone Impedance: 18-600 ohm
Total harmonic distortion: <0.005%
SNR: ≥110 dB
Frequency Response: 20 Hz – 30 kHz
Size: 90 * 90 * 39 mm (L * W * H; 3.54 x 3.54 x 1.54 inches) /H: 80 mm with tube and feet
Net weight: 165g
Colors Available: Black, Silver
Input and Output Audio Jacks: 3.5 mm

Package include:

1× NS-02E amp
1× power supply

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.

User questions & answers

Question:	How many amps does the 6v power supply push? What are the ratings
Answer:	2A
Question:	Will changing the standard 6N3 tube to one of the other tubes listed in the description change the quilty of sound
Answer:	It can change the character of the sound yes depending on the tube you switch to.
Question:	Hi: this product says 'diy' in the description. is it a kit, or do you basically just need to put the tube in and plug in the power supply? tia
Answer:	im not sure why it says diy.. it came complete in box. All you have to do is plug it in to the power adapter and its ready to go.
Question:	I have a solid state amp and want to add a tube amp to the mix. Is it possible
Answer:	If you have a line level out on your SSA then yes.

Nobsound Little Bear FU32(832A) Vacuum Tube Headphone Amplifier ; Mini HiFi Stereo Preamp

Based on 8 reviews Check latest price

Product description

Notice:

Input signal overload may cause distortion and noise. When this happens, please turn down the volume of the audio source until no noise and then adjust proper volume through the amp itself.

Parameters:

Audio input: 1*3.5mm Jack

Audio output: 2*3.5mm headphone jack(one for 12-40Ω headphone and one for 40-200Ω headphone)

Power supply: DC 12V@2A(5.5/2.2mm)

Tube model: Beijing FU32

Op amp: NE5532

Color: black

Dimensions: (L)86 mm *(W)86 mm *(H)43 mm(Excluding the tube)

Net weight: 320g

Packing List:

1*Headphone Amplifier

1*Power Supply

1*FU32 Tube

Noise may be resulted from:

1. Low-quality audio cables, poor audio source can cause the static noise.

2. The tubes not are plugged well on the tube sockets or the two red wires are not inserted to FU32 tube.

3. Devices like routers, mobile phones will also interfere in the audio signal and may cause static noise.

Not only as a headphone amplifier, compatible with wide impedance range(12-200Ω), but also as a preamp for your other power amplifier, convenient and efficient to improve sound quality.
1*3.5 mm stereo jack input, can be connected to computer, CD, mobile phone and lossless player. 2*3.5 mm output can also be connected to digital amplifiers and active multimedia audio devices.
Default Beijing FU32 vacuum tube, can be upgraded to GU-32/832; Default NE5532 op amp, can be upgraded to OPA2604, JRC4558, OPA2132, OP275 and so on for enjoying different tones.
Mini size with attractive appearance, compact design makes it suitable for desktop audio system.
Prompt and courteous customer service.1 year warranty and life technical support.

Douk Audio T3 Plus Vacuum Tube Preamp MM MC Phono Stage Desktop Headphone Amp

Based on 5 reviews Check latest price

Product description

Warm Tips

1. 3.5mm AUX input with priority, please make sure the AUX cable has been pulled out if want phono input.

2. Stereo RCA and 3.5mm headphone jack can output at the same time.

Parameters

Audio input: phono/turntable (RCA) / 3.5mm AUX

Audio output: stereo RCA / 3.5mm headphone jack

AUX IN

AUX input level: 1V

RCA max output level: 2V

Frequency response: -1dB(20Hz-20KHZ)

THD: 0.01%

SNR: 100dB

PHONO IN

Phono input level: 0.005V

RCA max output level: 530mW (MM) / 5V (MC)

Frequency response: conforms to RIAA characteristics

THD: 0.2%

SNR: 89dB

Headphone output power: 130mW@32Ω

Matched headphone impedance: 32-300Ω

Working voltage: DC 12V

Dimensions(W*D*H): 50*120*138mm / 1.97*4.72*5.43in

Package dimensions(W*D*H): 320*240*80mm / 12.60*9.45*3.15in

Net weight: 540g / 1.19lb

Package weight: 900g / 1.98lb

Packing List

1*T3 Plus Tube Preamp

1*12V Power Adapter

Douk Audio T3 PLUS can be used as a MM/MC phono preamp, a tube audio preamp and a headphone amplifier, powerful function in mini size, specially designed for various requirements.
Multiple audio inputs for different purposes: with 3.5mm AUX and phono inputs, supports both MM and MC cartridges, compatible well with different MM/MC record players and other audio devices to satisfy different demands.
With headphone output and perfect design: can be used as a headphone amplifier to drive 32-300 ohm headphones. Reasonable and advanced circuit and high-quality components, such as power 3PCS JRC2608 op amps, high-end power management part etc.
Pluggable Vacuum tube design and HiFi sound: using 6A2 tubes to soften, sounds warm and delicate, full and mellow, much softer and more listenable. Can be directly replaced by 6J1/6J4/ GE5654/6AK5/6*1N to enjoy different sound styles.
Unique appearance and proper size: vertical placement design, black solid aluminum chassis with wire drawing and frosted technology, looks cool and distinctive, both enjoyment of auditory and visual, very suitable for the audiophiles who pursue HiFi sound.