Vacuum tube preamplifier

Nobsound 12AX7 12AU7 Vacuum Tube Preamp HiFi Preamplifier Shigeru WADA Japan Circuit (Assembled)

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Description:

Technical Parameters:
Input sensitivity: 400mv
Voltage output: 2V (RMS THD <0.03)
S / N Ratio: 94DB
Frequency Response: 12Hz-50KHz (-0.5DB)
Input Impedance: 200Kohm
Output Impedance: 600ohm
AC Input: 100V (115V)
Power Consumption: 30W
Dimension (W-D-H): 320 * 170 * 120 mm / 12.6 * 6.69 * 4.72 in (Add tube height)
Net Weight: 3.5 kg / 7.72 lb, with a packaging weight 4 kg / 8.82 lb

Package Includes:
1 tube preamp
1 Power cord

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  • Shigeru Wada Japan circuit improved circuit; Vacuum Tube: Shuguang 12AX7 * 2 / 12AU7 * 2 / 6Z4 * 2
  • Excellent scaffolding design, reasonable, regular, symmetrical device layout, strictly respect the grounding line
  • Power Transformers 76 * 40 H250 0.35 sheets; Japan ALPS 16 A-type audio potentiometer
  • Full aluminum chassis with wood side panel; 4 Set of stereo L/R RCA auido input, 1 set of RCA output








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Nobsound Bluetooth HiFi 6J1 Vacuum Tube Preamplifier Stereo PreAmp Digital Treble & Bass Tone Control (Black)

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Description:

Bluetooth Connection:
Some customers may find the Bluetooth can't be connected or found. Here is the solution.
1. Power off the M8 and your phone.
2. Wait for 5s and then power on both.
3. If it still can't be discovered, repeat 1 and 2 and it should work.
If the problem can't be solved, please visit https://www.amazon.com/sp?seller=ADPE7GPX91ORE and click "ask a question" to contact us.

Troubleshooting:

  • 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:
    1. There is a large probability that the low-quality audio cable causes the static noise.
    2. Please make sure the sound source is fine since tube amplifiers will amplify all sound including the noise.
    3. Please check whether the tubes are plugged well on the tube sockets or not.
    4. 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.

Specifications:

  • Audio input: 1 set of RCA input; 1 * 3.5mm stereo input; 1 * Bluetooth input
  • Audio output: 1 set of RCA output
  • Dimensions: 16*11.5*7 cm (including tube height)
  • Power supply: universal 12V DC

Packing List:

  • 1 * PreAmp
  • 1 * Power supply
  • 3 * 6J1 tube (one spare tube)
  • 1 * Bluetooth antenna

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  • Notice: Preamplifier needs to work with amplifiers or active devices; Not PHONO preamp and can't be used for record players
  • Vacuum tube preamp with Bluetooth; Convenient to improve your sound quality
  • Audio signal input can be computer, CD, phone and lossless player; Three kinds of audio input: RCA; 3.5mm stereo input; Bluetooth
  • Easily switching between different sound sources with its audio input selection
  • Treble & bass adjustment; Sound is warm and broad; No background noise; Gold-plated for input and output terminals; 6J1 valve tube; Mini size suitable for desktop









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Douk Audio Mini 6J1 Valve & Vacuum Tube Pre-Amplifier Stereo HiFi Buffer Preamp

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Description:

Parameters:

  • Dimensions: 98 * 100 * 32 mm (without knobs and terminals)
  • Power supply: DC12V 1A
  • Frequency response: 20Hz (-0.2dB) 20KHz (-0.2dB)
  • SNR: 100dB
  • Input sensitivity: 300mV 2000mV
  • Output: 3000mV
  • THD: 1000mV 0.1
  • Weight: 350g

Packing List:

  • 1 * amplifier
  • 2 * 6J1 tube
  • 1 * power supply

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  • Notice: Preamplifier needs to work with amplifiers or active devices; Not PHONO preamp and can't be used for record players
  • Classic 6J1 tubes with optimized circuit offer classic music experience
  • Tube can be replaced by 6ж1П, 6AK5,6BC5, EF40, EF95, CV8505654; Much fun and high playability
  • DC12V 1A universal power supply; Can be used in most countries and regions
  • All aluminium alloy shell; Gold-plated terminals; ENIG PCB








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Nobsound Little Bear T7 Vacumn Tube Mini Phono Stage RIAA MM Turntable Preamp & HiFi Tube Pre-Amplifier (Silver)

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Description:

Notice:

As a phono preamp, it is suited for MM turntables only. Do not support MC turntables.

As an AUX preamp, it is suited for devices like CD, DAC, PC, cellphone.

Parameters:

  1. RIAA phono part:
    • RIAA freq response 20hz-20kHz /- 0.5dB, S / N ratio> 85dB
    • THD <0.05, input sensitivity 3.0mV, gain 40dB
    • Nominal / max output 300mV / 1.8V
    • Output impedance 200 ohms, input 47k ohm / 220 pF
  2. AUX part:
    • Input voltage: AC12 18V
    • Frequency response: 20 HZ - 20 KHZ
    • Input sensitivity 300 mv
    • SNR: 96 db
    • Total harmonic distortion <3 (1 KHZ)
    • Power range output: 0.2 W
    • Output impedance: 100K
    • Input impedance: 50K

Chassis size:

8011628mm

Net weight:

0.24Kg (0.55Kg with package)

Package includes:

  • 1 x preamplifier
  • 1 x power supply
  • 2 x 6J1 tubes

What's more:

  • Please do not use the BACKUP tube(with a letter "B") when you start the device for the first time.
  • It will be better if its GND jack can be really connected to the ground, which can decrease the background noise to a very low level.
  • For MM turntables, please check whether your MM cartridge is the old version. If so. we suggest you to upgrade it as a new version one will bring much better sound.
  • Please make sure that your turntable has a PHONO output. A LINE OUT turntable has a built-in preamp and it won't work well with T7.
  • Please keep T7 away from devices that can transfer signal like cellphones and routers.
  • Do not connect T7 to any inferior Bluetooth digital amplifiers except Class T digital amplifiers, since all Class D amplifiers have very loud background noise.

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  • This product can be used as a MM Turntable Preamp or a HiFi Tube Pre-Amplifier and can provide high fidelity and warm sound beyond your expectation.
  • Please do not connect T7 to any inferior Bluetooth digital amplifiers except Class T digital amplifiers, since all Class D amplifiers have very loud background noise.
  • Its tube(6J1) can be directly replaced with tubes like 5654, 6AK5, EF95 .etc
  • Its mini size makes it more portable and be suited for a variety of scenarios and Its alluminum body makes it strong and elegant.
  • Upgrades of the new version: The gain switch is moved from inside to outside. Customers can adjust its gain more conveniently; The circuit is optimized and the noise is lower.









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Nobsound HiFi 6J1 Vacuum Tube Preamplifier Stereo PreAmp Digital Treble&Bass Tone Control (Silver)

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Description:

Troubleshooting:

  • 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.

Specifications:

  • 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

Package Includes:

  • 1 * Digital Audio Preamp
  • 1 * 12V Power Supply

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  • Notice: Preamplifier needs to work with amplifiers or active devices; 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; 6J1 valve tube; Black version ASIN: B01NBM7K8L








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Nobsound NS-10P Mini Vacuum Tube Preamp Audio Hi-Fi Stereo Pre-Amplifier Treble & Bass Control

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Description:

What's more:

  • For the matching 3.5mm audio cables, please search them on Amazon with ASIN: B073RF3R2D or B073RF4NYS.
  • Please note this is a preamplifier (not like NS-08E), which needs to be connected with amplifiers or active speakers. It is not a phono preamp and can't be used for turntables.
  • It suits for almost all amplifiers in the market especially for tube headphone amps like our NS-08E (B014FASL1A), NS-01E (B01I19SBAW) and NS-02E (B01M7101CY), and will greatly enhance the sound performance of digital amplifiers like our TPA3116 amps (B00WTOAC1M / B074J9X3P5 / B01HD5T4QA / B07548PWQQ).

Using Instructions:

Phone / Player / MP3 / CD / DAC / Computer -> 3.5mm / RCA audio cable -> NS-10P preamp -> 3.5mm / RCA audio cable -> Amplifier / Headphone amplifier / Active speakers

Parameters:

  • Input: AC 100 240 V; 50 / 60Hz (universal)
  • Output: DC 6V 2000Ma
  • Voltage amplification: 1.5 2.0 times
  • Audio input / output: standard 3.5mm
  • Power interface: 6V -- 5.5 * 2.5
  • SNR: >= 110Db
  • Frequency response: 20 30 KHz
  • Dimensions: 105 * 69 * 32 (65mm height with tubes)
  • Net weight: 205g

Packing List:

  • 1 * NS-10P tube preamp
  • 2 * 6J1 tubes
  • 1 * 6V / 2000mA power supply

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  • Notice: Preamplifier needs to work with amplifiers or active devices; 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
  • Douk Audio is committed to provide highest level of customer service. For any questions, please contact us at [email protected] We will get back to you within 24 hours.








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Presonus TubePre v2 Tube Preamplifier DI Box

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Description:

Twist the TubePre V2 Drive saturation control and add the color that only a hand-selected 12AX7 vacuum tube can deliver from gentle warmth to total fuzz. Unlike other compact tube preamps, TubePre V2 starts with the low noise, high headroom Class A XMAX preamp input stage found in our premium interfaces and digital mixers. Discrete components and high-voltage operation deliver best-in-class dynamic range and detail not found in other single-channel tube preamps.

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  • 12AX7 tube-based preamp with XMAX solid-state input stage
  • Gain control and Tube Drive saturation control
  • Low-noise dual-servo (no capacitors) gain stage
  • Separate instrument and mic inputs
  • Phantom power, HP filter, -20 dB pad, and polarity-reverse
  • Compact 1/3U rack-mount chassis



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Nobsound Little Bear T11 6N2/12AX7 Vacuum&Valve Tube Phono Turntable Preamplifier; MM RIAA LP Vinyl Record Player Preamp; Stereo HiFi Audio Pre-Amplifier

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Description:

Technical Specifications:

  • Output Voltage: 2.0V
  • Gain = 48dB
  • Input RIAA 5mV
  • THD 0.5
  • Frequency Response: standard characters
  • Signal to Noise Ratio 65dB(A)1KHz (input: 10mV; output: 0.7V)
  • Power supply: AC110V(115V) 60Hz/50Hz

Packages:

  • 1 Preamplifier
  • 1 6Z4 Tube
  • 3 6N2 Tubes
  • 3 Metal Tube Covers
  • 4 Acrylic Tube Covers
  • 1 Power Cable
  • 1 GND wire

Q&A:

Q: I got a loud hum with T11.

A: At first, we have to clarify that all phono preamps have a certain of background noise. It won't be loud, while a little loud is normal. Besides, there are many factors.

  • Reason A: T11 isn't connected to ground well.

    While the device is playing music, picking up the GND copper part of T11 with your fingers. If the background noise is much lower, then T11 isn't connected to the ground. For this issue, we prepared a 3m wire in the package for you to solve it by yourself. Just use it to connect the GND with any large mental item in your home like windows or mental tables.

  • Reason B: T11 doesn't match with your amplifier well.

    Digital amplifiers cannot be connected to the ground directly, which may cause T11 much noise. For this issue, you can just set the T11 GND switch (on the back of it) to OFF. However, this will lead to bad noise from T11 itself as it is not connected to the ground. You can only choose the bearable way. That's why we recommend using professional pure HiFi amplifiers (no Bluetooth will be better).

  • Reason C: The RCA wire has a poor quality.

    A good RCA wire will be equipped with an anti-jamming magnetic ring, which can effectively reduce various interference.

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  • Little Bear T11 is a pure tube phono preamplifier working with MM cartridge turntables only. Please make sure your turntable is equipped with a PHONO signal output instead of a LINE output.
  • Little Bear T11 is based on T10 with improvement. Compared to T10, T11 has lower background noise at normal volume. Its sound performance is better with increased liveness.
  • Adopting a conventional active RIAA equalization phono stage circuit. There is 3 metal covers and 4 acrylic covers for those tubes. And you will be able to choose which type as you like.
  • Supporting 6N2/12AX7 tubes, which offers many replaceable tubes for you like 6H2,6H2n (For 6N2 type) and 12AX7B,6N4(9PIN),ECC83,5751 (For 12AX7 type).
  • On the bottom of the description, there is a few Q&A for buyers who might meet the humming problem. If you encounter a similar issue, please check those tips, which have covered most of conditions.









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Nobsound Mini Fully-Balanced/Single-Ended Passive Preamp; Hi-Fi Pre-Amplifier; XLR/RCA Volume Controller for Active Monitor Speakers (Black)

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Description:

The Best Choice for Active Speakers

More and more audiophiles find that the behavior of normal multimedia speakers cannot meet their demands, and then they choose professional active monitor speakers. However, this kind of speakers usually doesn't have a volume controller, which means a pre-amplifier is needed.

Active monitor speakers are mostly placed on the desk and used for near field listening. So they need to consider the area required for Hi-Fi pre-amplifiers (normally very big). What'more, different pre-amplifiers may differ in their timbres and this is the most bothersome issue.

As an audiophile brand, Nobsound decided to solve this problem and designed this product. Its small size won't take much place and its clean silver color suits for various usage scenarios. There is no amplifying circuit in the device and won't change the timbre, while the amplifier in the active speaker is enough to drive it. With this product, you can enjoy the most original timbre and quality of the speakers and won't be trapped in the selection of pre-amplifiers.


Specifications:

  • Dimension: 148 x 48 x 80 (mm)
  • Weight: 0.6 (Kg)
  • Impedance: 50K
  • Input: RCA / XLR (selection switch)
  • Output: RCA / XLR (selection switch)

Package:

1 * pre-amplifier

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  • This product uses the expensive ALPS 27 quadruple fully-balanced potentiometer, NEUTRIK XLR, Pro-Singnal RCA. Nobsound never be stingy in the components and materials of our products.
  • This prodcut has a small size, while is still euipped with commonly-used interfaces. There is a selection switch which you can choose the fully-balanced or single-ended audio signal mode, as well as the output or input mode.
  • This prodcut has no amplifying circuit and won't change the timbre. You can enjoy the most original sound of your active monitor speakers.
  • Its clean black appearance suits for almost every usage scenarios.
  • PLEASE NOTE: This is a PASSIVE PREAMPLIFIER. It has NO amplifying circuit.









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Dilvpoetry TUBE-01 Preamp 6J1 Vacuum Tube Amplifier Buffer Mini HiFi Preamplifier DC12V2A (Silver)

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Description:

Specification:

Color: Silver

Material: aluminum alloy case, PCB, gold-plated interface

Magnification: 1.5 times

Power supply: DC12V 2A

Output Power: 2000MV

Impedance: 600R

Response frequency: 20 HZ (-0.2DB) -20 KHZ (-0.2DB)

SNR: 100DB 

Output: 3000MV

Input sensitivity: 300MV-2000MV

THD: 1000MV 0.1

Weight: 350g

Size: 100mm * 98mm * 32mm

Package including:

1 x Amplifier

1 x DC12V2A

2 x TUBE

1 x new packaging



FAQ
1.Can it be used for turntables?
No
2.Can it be used with headphones?
No

Please note:
We are a responsible seller. If you have any questions about the product, please feel free to contact us and we will help you solve it.
The DiLiS-HIFI store is committed to providing the best service to its customers.

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  • Patent power conversion module. No background noise.It cannot be used for turntables.Can not be used with headphones.
  • All aluminum alloy shell, heavy gold PCB, gold-plated interface. Mini Size hifi amplifier preamplifier, exquisite desktop decorations.
  • Using classical tube 6j1 design and optimize the route.Unique high bass adjustment ;Tube can be replaced design,soft voice.
  • Can match digital power amplifier analog power amplifier,active speakers.Can match digital power amplifier analog power amplifier,active speakers.Patent power conversion module.
  • Guarantee & Satisfaction - If you have any dissatisfaction, please contact us and we can give you a full refund or replacement of the product.







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Vacuum tube preamplifier