Description

HiFi Bluetooth Vacuum Tube Preamp Stereo Receiver USB DAC Desktop Headphone Amp Description 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 Payment 1.We accept PayPal only. 2.All major credit cards are accepted through secure payment processor PayPal. 3.Payment must be received within 7 business days of auction closing. 4.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay. Shipping 1.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay. 2.Items will be shipped within 1-3 business day when we received payment. 3.Delivery time depends on destination and other factors; 4.International buyers please note: a.Import duties, taxes and charges are not included in the item price or shipping charges. These charges are buyer’s responsibility. We will try our best to reduce the risk of the custom duties. b.Please check with your country's customs office to determine what these additional costs will be prior to buying. 's customs office to determine what these additional costs will be prior to buying. Returns policy 1.If the item is not as described or damaged in transportation, please send it back within 7 days upon date of receipt 2.For defective item, we guarantee free exchange or full refund within 30 days from the day of placing order 3.Buyers pay shipping fees at their own cost to return products for exchange or refund. We will be responsible for the postage of replacements 4.Items must be unused, in original packaging and include all parts, accessories and packaging 5.When we receive your returned item, we will investigate the situation and consider to offer replacement or refund according to the situation Terms of sales 1. All the items will be tested before shipping. Buy them with the confidence! 2. We maintain hightest buyer ratings StarStarStarStarStar and 100% customer satisfaction, Positive Feedback will be much appreciated from you. 3. 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