T11 Vacuum Tube Phono Stage Turntable MM RIAA Preamplifier for Record Players

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T11 Vacuum Tube Phono Stage Turntable MM RIAA Preamplifier for Record Players
Item description
Introduction
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. What's more, T11 is applied with an enhanced manufacturing process and equipped with a metal chassis, which managed to give it a more elegant and exquisite appearance.
Features:
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. (We suggest using metal covers if there exists effect sources in the surroundings. Otherwise acrylic covers will have a better appearance.)
The GND switch on its back panel is setting to connect with the ground in default. However, there may get some loud background noise with a few digital amplifiers. Please try setting it to disconnect with the ground then.
There is a 3-meter black cable in the package, which can be wired between T11 with huge metal items such as doors or windows if your wall outlet has no ground connection.
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).
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) / 220V(235V) 60Hz/50Hz (The correct version will be sent according to your address)
Dimension:
220*180*64 mm
Weight: 2.5kg
Packing list:
1× Phono Preamp
1
×
6Z4 Tube
3
×
6N2 Tubes
3
×
Metal Tube Covers
4
×
Acrylic Tube Covers
1
×
Power Cable
1
×
GND wire
Q&A about the hum problems
Q: I got a loud hum with this T11 phono preamp.
A: For the hum noise, in the beginning, we have to clarified that all phono preamps have a certain of background noise. It won't be loud, while a little loud is just normal. Turntable is a kind of analog players and cannot be compared with digital players in this respect. Besides, there are many factors which may lead to bad noise. To find the right reason, you need to do some tests and here are some instructions.
Reason A: T11 isn't connected to ground well.
This is the most common and unnoticed reason. Please test it following the steps as below.
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.
There is a possibility that T11 may not match with some digital amplifiers well, which may lead to very loud noise. This is because digital amplifiers cannot be connected to the ground directly. 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 like AV amplifier or vacuum tube amplifiers (it will be better if the amplifier isn’t equipped with Bluetooth).
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.
Q: T11’s power light is on while one or several tubes is not.
A: Please check whether the tube is plugged into the tube seat completely. Otherwise please check the tube whether it seems like a thin mist is inside. If so, then the tube is defective and you need to replace it.
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We are NOT responsible for any customs duties fee.
We are NOT responsible for any import tax or customs delay.
Most item will be shipped within 2 working days. For package less than 2KG, we use
Airmail
(10-25 days to most countries)
and for package over than 2KG we use
Expedited Service such as DHL, UPS and FEDEX
(5-8 days to most countries).
Return Policy
Free Return Within 30 Days
We provide  return within 30 days
for all items you bought on eBay, full refund and return shipping will be provided.
1-year warranty
is provided for all items(
Excluding: 1. Man-made damage or misuse. 2. Audio accessories and consumables such as vacuum tubes).
If you are satisfied with our products and service please leave a 5-star
.
Feedback is very important to us just like our lives, please DO contact us before you leave a neutral
or negative
feedback, we will provide better solutions until you are satisfied.
About us
Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including
Douk Audio / Nobsound / Little Bear
etc.
As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable.
We will spare no efforts to bring great products and service for
customers
and extremely
to
improve our customers’ listening experience.
Contact us
Please don't hesitate to contact us if you have any questions or comments about our items.
And our working time is from Monday to Friday between 9:00 am to 06:00 pm(Beijing Time), which means we can keep on-line at:
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During holiday, please allow us to response you early next week. Please don't leave any negative / neutral feedback or make dispute/claim on our non-working time, thank you for your understanding and cooperation.
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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.