Douk Audio PRO Bluetooth Power Amplifier 6K4 Vacuum Tube Amplifier USB DAC VU Meter ST-01 5.0 100W2 COAX/OPT

---------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------ 【Cautions for using electrical products】 When using electrical appliances, please note that the voltage is different from that of Japan, which may cause malfunctions. Since the plug type is Japan type(A or B type), please check the voltage and use a transformer. Please note that a transformer is different from a conversion adapter. We are not responsible for malfunctions caused by use without a transformer. ------------------------------------------------------------------------------------------------------------------ [High Power and Special AUX Output] Using TI's classic power amplifier IC, each channel can output 100W (4Ω), which can easily drive all 3-8Ω passive speakers. Add a 3.5mm AUX output to easily connect another amplifier or active speakers/subwoofer to create a multi-channel system and enjoy a great home theater experience. [Digital Audio Input] Bluetooth 5.0 / USB / Coaxial / Optical / Stereo RCA allows you to connect with most audio devices such as smartphones, computers, tablets, TVs, TVs, CD players, etc. A perfect combination of DAC and amplifier, recommended for audiophiles who own a variety of audio equipment. [HiFi Clear Sound with Tone Control] Adopts a resonant circuit, concise wiring, and vacuum tubes to soften the sound and remove the digital feeling, producing a warm and sweet sound without noise. It also provides exciting highs and deep bass for HiFi music, with treble and bass knobs to adjust your own preferred sound style. [Remote control included & practical functions for ease of use] A full-featured remote control allows you to configure all settings from a distance. Equipped with input selection and indicators to clearly display your work status in real time. The aluminum alloy case is specially designed, cool and unique to decorate your desktop space. [Note] 1. ST-01 PRO supports USB memory input and can play music in lossless format. 2. Added VU meter sensitivity adjustment on the bottom, easy to set up and better compatibility with different input signals. 3. Added 3 decorative golden rings around the vacuum tube and VU meter, making it look more elaborate and luxurious. 4. PC-USB input is also compatible with smartphones with OTG function, but an OTG cable is required for Android systems and a camera kit is required for IOS systems. Please prepare your own. 5. Pluggable tube socket, default 6K4 tube can be replaced with 6J1 / 6J2 / 6*1n / 5654 / 6J4 / 6J5 / 6K5 / 6A2 etc. The ST-01 PRO amplifier and VU meter are integrated into one compact unit, and when you enjoy HiFi music, the pointer dances in a warm, vintage-looking light, dynamically decorating your audio space.