Multiple inputs and outputs for different purposes: Bluetooth / USB(plug-and-play) / RCA inputs and RCA / 3.5mm headphone jack outputs, L200 can be used as atube Preamp, a USB DAC or a headphone amp to satisfy different requirements of home stereo system. High-end components are used to ensure perfect performance and long time stable work: QCC3034 Bluetooth chip, supports APTX/APTX-HD, lossless transmission with no delay. PCM5102A independent decoding chip, stronger decoding ability to get clearer sound. 2PCS NE5532 op amps, integrate pre-amplification and tone control, make sound full and mellow. 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Sign Up Now ! HiFi Vacuum Tube Preamp Mini Bluetooth Receiver Headphone Amp USB DAC APTX-HD Item description IMPORTANT NOTE: Turn ON position means Treble and Bass Control are invalid. Features Multiple inputs and outputs for different purposes: Bluetooth / USB(plug-and-play) / RCA inputs and RCA / 3.5mm headphone jack outputs, L200 can be used as atube Preamp, a USB DAC or a headphone amp to satisfy different requirements of home stereo system. High-end components are used to ensure perfect performance and long time stable work: QCC3034 Bluetooth chip, supports APTX/APTX-HD, lossless transmission with no delay. PCM5102A independent decoding chip, stronger decoding ability to get clearer sound. 2PCS NE5532 op amps, integrate pre-amplification and tone control, make sound full and mellow. Vacuum tube design for better sound: improve everything detail, transparency, immediacy, richness, tone associated with your music. The sound is natural and delicate, warm and soft, dynamic and pleasing. 6J5 can also be replaced to 6J1/6J4/GE5654/6AK5/6*1n according to personal preference. Separate control of Treble & Bass: can independently adjust the bass and the specific proportion components in high-frequency sound to perfectly achieve HiFi effects. And with a bypass switch to turn on/off the tone control, more convenient to enjoy original sound. Exquisite appearance with proper size looks cool and attractive, perfect functions and powerful performance bring wonderful auditory and visual enjoyment, very suitable for audiophiles who purue HiFi music. Warm tips: 1. Bluetooth input is prior to USB input, if you want USB input please make sure Bluetooth input is disconnected. 2. USB input doesnt support U-disk or Hard-disk, can connect USB interface of computer or mobile phones (Android system needs OTG cable and IOS system needs camera kit, please prepare by yourself). 3. This is a preamp but NOT a amplifier or a phono preamp, CANT be used for turntables or passive speakers. The main purpose of L200 is to act as a buffer to sweet the sound. Parameters Audio input: Bluetooth/USB/Stereo RCA Audio output: stereo L/R RCA / 3.5mm headphone jack Bluetooth version: 5.0 Bluetooth chip: QCC3034 (support SBC/AAC/APTX/APTX-HD) USB input sampling rate: 16/24bit 44.1-48KHz USB input supported system: Win XP/7/8/10/MAC/Linux / phone OTG Matched headphone impedance: 16-300Ω Output power of headphone jack: 268mW@16Ω Treble & Bass range: ±10dB Frequency response: 20Hz~25KHz (±3dB) Distortion: 0.1% S/N Ratio: >98dB RCA out level: 2V Working voltage: DC 12V/above 2A (5.5mm/2.5mm) Dimensions(W*D*H): 131*139*71mm / 5.16*5.47*2.80in Net weight: 550g / 1.21lb Package weight: 800g / 1.76lb Packing List 1*L200 Tube Preamp 1*DC 12V Power Adapter 1*User Manual Payment Delivery details Return Policy About us Contact us Payment Safe and secure payment by PayPal. Delivery details 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). Return Policy Free Return Within 30 DaysWe 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 dont 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 dont 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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