Douk Audio ST-01/ST-01 PRO HiFi เครื่องขยายเสียงสเตอริโอ บลูทูธ 5.0 USB DAC COAX/OPT ดิจิทัล แอมป์เสียง โวลต์มิเตอร์ 100W+100W

Warm tips:
In addition to retaining all the original functions ST-01 PRO is the latest upgraded version of ST-01:

1. Add a M1 button on the remote control of ST-01 and ST-01 PRO to turn on and off the function that it will auto enter mute mode when there is no signal input for 10S.
2. ST-01 PRO supports U-disk input to play lossless formats music.
3. Add sensitivity adjustment of VU meter on its bottom easy to set and match better with different input signals.
4. Add three decorative golden circles around tubes and VU meter looks more exquisite and luxury.


Features

Unique and amazing combination: integrated ST-01/ST-01 PRO amplifier with VU meter into whole in such a mini size the pointer dancing in the warm light with strong vintage feelings when enjoy HiFi music dynamically decorates the audio system space. 

HiFi clear sound with tone control: resonable circuit and concise wiring adopts vacuum tubes to soften the sound and filter out the digital feelings sounds warm and sweet without noise. Also with treble and bass knobs to adjust ones own preferable sound styles presents HiFi music with rousing highs and deep lows.

Strong output power and special AUX output: use TIs classic power amp IC each channel can output 100W(4Ω) and easily to drive all 3-8Ω passive speakers adds 3.5mm AUX output easy to connect another amplifier or active speaker / subwoofer to build multiple channel system and enjoy wonderful home theater experience.

With multiple digital audio inputs: Bluetooth 5.0 / USB / Coaxial / Optical / stereo RCA compatible with most audio device such as phones computers tablets TVs TV CD players etc. The perfect combination of DAC and amplifier very suitale for audiophiles who have various audio devices. 

Practical functions to simplify use: with full-function remote control all settings can be achieved from the distance; with input selection and indicators clearly to show the working status in real time; aluminum alloy case is specially designed cool and unique to decorate your desktop space.



Warm tips:
1. PC-USB input also supports mobile phones that with OTG functions but Android system needs OTG cable and IOS system needs camera kit please prepare by yourself. 
2. Pluggable tube socket default 6K4 vacuum tubes can be replaced by 6J1 6J2 6J3 6J4 6J5 61N 6*4N 6*5N 5654/5654W 5725 6AK5 EF95 6BA6 403B etc.
3. When the volume is turned down to minimum the BT/(USB) indicator will be flashing; and when to maximum the PC-USB indicator will be flashing; At this time the indicator of current input channel will go out but light on when the adjustment is stopped.
4. Default comes with 24V/5A power adapter enough for common use if you want higher power output to drive your speaker better please click LINK to buy DC 36V/5A power adapter.

Parameters
Brand: Douk Audio
Model: ST-01 / ST-01 PRO
Audio input: Bluetooth / USB (PC-USB) / Coaxial / Optical / RCA / U-disk (only ST-01 PRO supported)
Audio output: Banana speaker jacks / 3.5mm AUX
Max output power: 100W+100W (4Ω)
Matched impedance: 3-8Ω
Sampling rate supported:
USB input: 96KHz/24Bit
Bluetooth input: 48KHz/24Bit
COAX/OPT inputs: 192KHz/24Bit  
Supported formats of U-disk: MP3 / WAV / WMA / FLAC / APE
Max capacity of U-disk: 64G
Treble / Bass adjustment range: ±6dB
System PC-USB supported: XP/W7/W8/W10/MAC/ Linux
Frequency response: 20Hz-20kHz(±1dB)    
S/N ratio: ≥98dB
THD: 0.07%
Working voltage: DC 18-30V
Dimensions(W*D*H): 115*98*54mm / 4.53*3.86*2.13in
Package dimensions(W*D*H): 295*225*85mm / 11.61*8.56*3.35in
Net weight(ST-01): 634g / 1.40lb
Net weight(ST-01 PRO): 661g / 1.46lb
Package weight: 1.4kg / 3.09lb

Packing List
1*ST-01/ST-01 PRO Amplifier
1*DC 24V Power Adapter
1*Remote Control (without 2*AAA batteries)
1*USB Cable
1*Bluetooth Antenna
1*User Manual