PAY ATTENTION: 1. This product is a pre-amplifier ! It is not a power amplifier and NOT COMPATIBLE WITH PHONO OR TURNTABLE. 2. Low-quality audio lines will generate noise as a result. 3. The headphone jack output is prior, stereo RCA output will auto disconnected when connecting headphones to its 3.5mm output. 4.Need to connect a power amplifier or active multimedia speaker. 5. Please make sure connect the preamplifier first and THEN turn the power on. Features 1.Bluetooth vacuum & valve tube preamplifier and headphone amplifier. 2.Headphone output is 160mW @32Ω and is suitable for 32~300Ωheadphones and headsets 3.Bluetooth 5.0 function, supports APT-X, APT-X LL lossless transmission. 4.Support Bluetooth/USB/RCA inputs from various devices like iPod, Phone, MP3, TV, Blu-ray players, Echo Dot, CD players, computer etc. 5.Treble and Bass Control function, more play-ability. 6.Replaceable Vacuum Tubes, can use 6K4/6J1/6J2/6J4/GE5654/6AK5 vacuum tubes, etc Specifications: Audio input: Bluetooth / USB / Stereo RCA Audio output: Stereo RCA / 3.5mm headphone jack Bluetooth version: 5.0 (support APTX-LL) Chipset: QCC3008+CM6642+NE5532P PC-USB input sampling frequency: 24Bit/192K PC-USB System supported: XP/W7/W8/W10/MAC/linux Frequency Range20Hz-20kHz(±3dB) THD: 0.1% SNR: ≥98dB RCA output level: 2V Bass & Treble range: ±6dB Headphone matched impedance: 32-300Ω Headphone output power: 160mW/32Ω Power Supply: 12V/1.5A Dimensions(W*D*H): 130*128*30mm / 5.12*5.04*1.18in Package dimensions(W*D*H): 300*220*70mm / 11.81*8.66*2.76in Net weight: 470g / 1.03lb Package weight: 770g/ 1.76lb Package: 1 x Tube-T5C Preamplifier 2 x 6Ж1n-EB Vacuum Tubes 1 x PC-USB Cable 1 x Bluetooth RF Antenna 1 x Power Adapter 1 x User Manual
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