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HiFi Bluetooth Röhrenvorverstärker Stereo Audio Preamp USB DAC Headphone Amp

Artikelbeschreibung

Features
  • Multiple audio inputs: with Bluetooth/USB/RCA/3.5mm AUX inputs, can be perfectly compatible with iPod, Phone, MP3, TV, CD players, laptop, desktop computer etc., satisfy most requirements of common home audio system use.
  • Multiple functions:
Can be used as a tube preamp, connected between audio source and amplifier or active speaker to greatly improve the sound quality.
 
Can be used as a headphone amp, MC33078 chip, support 16-64Ω headphones, convenient to listen to lossless music alone or at night.
 
Can be used as a USB DAC, support 24Bit/192Khz sampling rate to provide sound with higher quality and lower distortion, no need for any driver, plug and play.
  • HiFi clear sound and unique design:
Built-in vacuum tubes design to filter out the digital sounds, the sound warm and sweet, full and mellow, much softer and more listenable. Default 6K4 tubes, and can be directly replaced by 6J1/ 6J4/ GE5654/ 6AK5/ 6*1N to enjoy HiFi sound of different styles.
 
With ±14dB treble and bass control, and bypass function is specially designed to turn on/off the tone control, more convenient to enjoy original sound or obtain more delicate sound with treble and bass control knob, adding much fun and higher playability.
  • Mini size and exquisite appearance, aluminum case make it more fashionable and powerful. With OLED display can clearly show the working status in real time, and full-function remote control makes the operation much easier, very suitable for home and desktop audio system use.
Warm tips:
 
1. 6.35mm headphone jack with priority, RCA output will auto disconnect when headphone is connected.
 
2. The USB interface doesn't support U-disk, and supports PC-USB and mobile phones which with OTG function (Android system needs OTG cable and IOS system needs large current camera kit, please prepare by yourself). 
 
3. Want upgraded GE5654 vacuum tube to improve sound quality please click: LINK. And for safer delivery, the remote control may not include battery(CR2025), please prepare it by yourself.
 
4. For environment protection and energy saving, the preamp will auto turn off when there is no audio signal input for 30 minutes.
Parameters
  • Audio input: Bluetooth/PC-USB/Stereo RCA/3.5mm AUX
  • Audio output: Stereo RCA / 6.35mm headphone jack
  • Chipset: CSR8635+MC33078*8+HS-100B+PT2314+TL494
  • PC-USB sampling rate: 16bit 44.1/48KHz
  • PC-USB operation systems: Windows XP/Vista7/8/10/Max OS
  • Tube model: 6K4*2
  • LINE Output Part
Treble & bass range: ±14dB (2dB/step)
Frequency response: ±0.18dB (20-20KHz)
Max output level: 5Vrms
THD+N: 0,3%
SNR: 100dB
  • Headphone Output Part
Output power: 100mW@32Ω
Frequency response: ±0.2 dB (20-20KHz)
THD+N: 0.31%
SNR: 98dB
Matched headphone impedance: 16-64Ω
  • Working voltage: DC 12V (above 1A)
  • Dimensions(W*D*H): 130*108*31mm / 5.12*4.25*1.22in
  • Net weight: 440g / 0.97lb
  • Package weight: 750g / 1.65lb
Packing List
  • 1 x Tube Preamp
  • 1 x DC12V Power Adaptor
  • 1 x Remote Control (without batteries)
  • 1 x Bluetootn Antenna
  • 1 x 6.35mm to 3.5mm Headphone Adapter
Safe and secure payment by PayPal.
Please leave VALID TELEPHONE NUMBER which is necessary and very important.
 
Customs Clearance
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). 

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 StarStarStarStarStar. Positive feedback rating Feedback is very important to us just like our lives, please DO contact us before you leave a neutral Neutral feedback rating or negative Negative feedback rating feedback, we will provide better solutions until you are satisfied.

 

 

 

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.
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:
 
 Working time

Beijing(CN)Monday-Friday09:00 AM - 18:00 AM
New York(US)
Sunday to Thursday08:00 PM - 05:00 AM
London(UK)Monday-Friday01:00 AM - 10:00 AM
Paris(FR)Monday-Friday02:00 AM - 11:00 AM
 
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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