HiFi Vacuum Tube Preamp Class A Single-ended XLR Balanced Audio Pre-Amplifier

$899.99 Buy It Now or Best Offer
free,30-Day Returns

Seller Store nobsound
(2643) 99.0%,

Location: Los Angeles, California
Ships to: US,
Item: 135263998883

Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Power:NO
Receiver Combo Features:Blu-ray Player,DVD Player
California Prop 65 Warning:NO
Features:Analog
Unit Quantity:1
Unit Type:Unit
MPN:JMQ424
Audio Outputs:Stereo L/R RCA,XLR
Audio Inputs:Stereo L/R RCA,XLR
Number of Channels:2
Number of Inputs:4
Color:Silver
Amplifier Class:A
Douk Audio:Douk Audio
Supported Modes:No
Surround Sound Formats:No
Number of Outputs:3
Type:Hi-Fi Amplifier
PA-03 MKII:PA-03 MKII

A spacer is added between the circuit board and the transformer to prevent interference. The specially designed relay input selection circuit does not cause other groups of sound crosstalk to the current channel. 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Sign Up Now ! HiFi Vacuum Tube Preamp Class A Single-ended XLR Balanced Audio Pre-Amplifier Item description Introduction Inspired by a classic circuit, we have made some improvements and developed this stereo balanced XLR/single-ended RCA PA-03MKII tube preamp. Adding it between sound source and amplifier can greatly improve the sound quality, much better than directly connecting DAC or CD player to the power amplifier. Features With 3 groups of stereo RCA and 1 group of XLR input, 2 groups of stereo RCA and 1 group of XLR output, it is compatible with most analog audio devices, and supports connecting 4 groups of audio source at the same time and switched via selection knob. Adopting 4PCS vacuum tubes, the sound is soft and noise-resistant, warm and natural, the high-frequency is extended and the medium / low-frequency is mellow, the listening feeling is very quiet, suitable for long-time listening. The current 6N11 tubes can be replaced by E88CC, 6922, and 6DJ8. A spacer is added between the circuit board and the transformer to prevent interference. The specially designed relay input selection circuit to avoid other groups of sound crosstalk to the current channel. Output delay design prevents DC output shock to damage amplifier or speakers. Adopting two groups of high voltage use op amp servo + FET regulator, low temperature wave, high speed, much quieter background, better sound reproduction. With treble and bass control, more delicate sound can be enjoyed. And a switch is designed to turn on/off the tone control, more convenient to enjoy original sound, with much fun and higher playability. The tone circuit is free from the common issue of bass and high-frequency harshness that can be grating on the ears. Unique design with attractive appearance, and high-end materials are used such as 100W Japan Z11 EI86 iron core transformer, stepping ALPS 27 WIMA potentiometer(built-in precision resistor), Nichicon and SONICAP capacitors, rhodium-plated RCA seat and so on. Parameters Audio input: 3 groups of stereo RCA + 1 group stereo XLR Audio output: 2 groups of stereo RCA + 1 group stereo XLR Tube: 6N11*4 ( can be replaced by E88CC, 6922, 6DJ8) Input power: AC 100-120V 220-240V 50/60Hz SNR: DC filament 100dB (when output 2V) Gain: 6.5 times Frequency range: 20HZ-100KHz (±0.5dB) Treble adjustment range: 15KHZ(±6.5dB) Bass adjustment range: 50HZ(±6.5dB) Input impedance: 100KΩ Output impedance: 200Ω Max output undistortion voltage: XLR 15V RMS/RCA 7.5V RMS@1KHz Distortion: 0.2% (VU meter turned off, no negative feedback) Chassis: full aluminum alloy Dimensions: 430*330*100mm/16.92*12.99*3.93in Net weight: 10kg / 22.05lb Package weight: 14kg / 30.86lb Packing List 1 x Tube Preamp 1 x Remote Control (without batteries) 1 x Power Cord Warm tips 1. The tube preamp is suitable for connecting to a pure power amplifier or an integrated amplifier. When connecting to an integrated amplifier, set the rear volume to two-thirds and then use the preamp to control the volume. 2. When not using the tone control function, please adjust the bass and treble knobs to the maximum position (turn clockwise to the end) to ensure the flattest frequency response curve. 3. The position of each tube is specific, before shipping we will test to make it in the best condition, so please don’t insert it at random, otherwise its performance will be affected. 4. The filament only supports DC power input now, DC/AC power switch are cancelled and without any functions. 5. The needle of VU meter can be stopped swinging, but the meter lamp cannot turned off. 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. Home Feedback Save Seller New Listed Ending Soon Contact us

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