Douk Audio Hi-fi Vacuum Tube Preamp Home Stereo System

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Sign Up Now ! Douk Audio Hi-Fi Vacuum Tube Preamp Home Stereo System Pre-Amplifier DIY KIT Item description Shipping from USA Warehouse, you will receive it within 1-6 bz days. Notice:   1. This is DIY KIT version which needs you have some welding ability and electronic knowledge to solder, and finished version please click: Link   2. Not include power cord, please prepare it by yourself. 3. Due to the scarcity of electronic tubes and the instability of inventory, the actual shipment will be replaced with different types of electronic tubes according to the actual situation. All replacement components are of the same level, and there is no difference in function and effect. Please understand. If you mind, please do not buy.
4. This kit includes only a circuit diagram. It is not recommended for beginners, but for users with electronics experience who can read and understand schematics. If you have any questions, please feel free to contact us, we are glad to help you.     Parameters:

• AC power supply: 100V-240V
• Audio Input: 4 groups * Stereo L/R RCA
• Audio Output: RCA
• Frequency Response: 10-26kHz (+/- 0.11dB), about 15 times voltage amplification
• Total Harmonic Distortion: 0.078%
• Signal to Noise Ratio: 99dB
• Input impedance: 100k
• Ouput impedance: 10k
• Gain: about 11dB
• Chassis Dimensions: 320mm*170mm*50mm
• Weight: 4KG

Features

• Using Japanese original ALPS 16 Type 15mm 100k Duplex potentiometer, switch is produced by Taiwan-funded factory.

• With 4 groups of RCA audio input, convenient to compare different audio source and no need to plug-in and out the cables repeatedly. Gold-plated terminals to guarantee lossless transmission.

• Using 0.8mm stainless steel CNC punching chassis, its SNR up to99dB, the background is extremely clean without any noise.

• Using WINA MKP10 0.1uf capacitors, 0.39u Swiss RIFA PHE 426 series, IT 2.2uf capacitors, etc.

• Power transformer uses H360 0.5 piece 76 * 40 core, especially with double shielding layers GND，grounding line is yellow-green line outlet. A group of filament 3.15v * 2 for 3*12AX7 filament power supply, high-voltage 270V * 2 uses 6Z5P tube rectifier. Amplification circuit using scaffolding of welding.

Packing List

• 1*Full set DIY KIT of tube preamp
• Not include power cord.

Payment Fast Shipping Return Policy About us Contact us Payment Safe and secure payment by PayPal. Fast Shipping

• The items are located in US, and will be shipped within 1 working day, 2-6 working days to deliver.

Return Policy

Free Return Within 30 Days

We provide free return with 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:    Working time

Beijing(CN) Monday-Friday 09:00 AM - 18:00 AM New York(US)
Sunday to Thursday 08:00 PM - 05:00 AM London(UK) Monday-Friday 01:00 AM - 10:00 AM Paris(FR) Monday-Friday 02:00 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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