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.

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　　HiFi 12AX7 Vacuum Tube Preamp 2.0 Channel Home Stereo Audio Preamplifier

　　Item description

　　Shipping from USA Warehouse, you will receive it within 1-6 bz days.

　　Warm Tips

　　1. 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.2. The circuit diagram sent is for reference only, please refer to the actual product, 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. 

　　Packing List

　　1*Tube Preamp

　　1*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-Friday09:00 AM - 18:00 AMNew York(US)Sunday to Thursday08:00 PM - 05:00 AMLondon(UK)Monday-Friday01:00 AM - 10:00 AMParis(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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