Sell ✆□ﺴNobsound HiFi Bluetooth 5.0 Digital Preamp Receiver Class A Desktop Stereo Audio Pre Amp Subwoofe best price

Warm tips: This is preamp, needs to work with amplifier/headphone amplifier/active speaker, cannot drive passive speakers directly. Its subwoofer output only can connect active subwoofer. Features Multiple Inputs for Different Usages: with 2 groups of RCA and Bluetooth 5.0 inputs and switch knob, can switch multi-way input signals losslessly, 1 group of full-frequency RCA and 1 group of low frequency output, can connect to an amplifier or active speaker and an active subwoofer at the same time. HiFi Clear Sound and Perfect Design: using 2PCS NE5532 op amps responsible for pre-amplification and tone control, 2PCS NE5532 for low frequency output circuit. L2 can greatly improve the sound quality, with wide frequency response, large dynamic, rich details, deep lows, sounds smooth and clear . Tone Control with Bypass Function: more smooth and delicate sound can be enjoyed by adjusting treble, mid and bass knob, and bypass function(turn treble knob to the leftmost end) is added to turn off the tone control and enjoy original sound, adding much fun and higher playability. Mature Circuit & High-quality Components: QCC3034 Bluetooth chip, supports APTX-HD protocol, can achieve a range of up to 50-70ft (20-30m) without obstacles, lossless transmission with no delay. Reasonable and concise layout, left and right channel are powered and amplified independently, no mutual interference. Pluggable socket design, easy to upgrade other op amps to enjoy music of better quality. Linear power supply, more smooth and much purer just like battery, the sound is much clearer and the reproduction is more accurate. Pure class A positive and negative pressure multistage independent rectifier filter and anti-interference circuit design, and the output power is strong and stable. Attractive Appearance and Wide Use: whole aluminum alloy case and pure aluminum knobs, looks more fashionable and durable, can match perfectly with audio players, DAC, computer, amplifier, headphone amp, active speakers, active subwoofers etc. to provide HiFi audio enjoyment. Parameters Audio input: 2 groups of RCA / Bluetooth 5.0 Audio output: 1 group of RCA / subwoofer output Bluetooth chip: QCC3034 Bluetooth supported protocol: SBC/AAC/APTX/APTX-HD Number of op amp: 4PCS NE5532 Subwoofer response range: 5Hz-180Hz Frequency response range: 20Hz-50KHZ Treble & bass range: ±10db SNR: 116dB @ 1KHZ Distortion: <0.003%@1KHZ Input impedance: 50KΩ Output impedance: 600Ω Working voltage: AC 100-120V / AC 220-240V Dimensions(W*D*H): 240*150*47mm / 9.45*5.91*1.85in Net weight: 1.5kg / 3.3lb Package weight: 2.0kg / 4.41lb  Packing List 1*Digital Preamp 1*Bluetooth Antenna 1*Power Cord 1*User Manual Precautions: *** "Pre-sale" ***The products are shipped abroad, and the logistics time limit is generally about 15 days. If you mind, please don't place an order &&&Pre-sale products as long as they are shipped overseas, please do not refuse to s