Douk Audio ST-01 PRO HiFi Bluetooth 5.0 Vacuum Tube AmpManual d'usuari més viu

1. Introducció

This manual provides detailed instructions for the safe and efficient operation of your Douk Audio ST-01 PRO HiFi Bluetooth 5.0 Vacuum Tube Amplifier. The ST-01 PRO is an upgraded version of the ST-01, featuring U-disk input and adjustable VU meter sensitivity. It combines a DAC and amplifier, offering multiple digital audio inputs and powerful output for an enhanced home audio experience.

2. Informació de seguretat

• Assegureu-vos que la font d'alimentació voltage compleix els requisits de la amplifier (DC 18-30V).
• No exposeu la unitat a la pluja, la humitat o les temperatures extremes.
• Eviteu col·locar la unitat a prop de fonts de calor o sota la llum solar directa.
• No obriu el amplificador casing; there are no user-serviceable parts inside except for the vacuum tubes.
• Desconnecteu l'alimentació abans de fer qualsevol connexió o realitzar tasques de manteniment.
• Mantenir fora de l'abast dels nens.

3. Contingut del paquet

Si us plau, comproveu el paquet per veure si hi ha els elements següents:

• 1x ST-01 PRO Ampmés viu
• 1x DC 24V Power Adapter (optional, may vary by region)
• 1x Remote Control (batteries not included, requires 2*AAA batteries)
• 1x cable USB
• 1x Bluetooth Antenna
• 1 x manual d'usuari

4. Producte acabatview

4.1 Controls del panell frontal

The front panel features essential controls and indicators for easy operation.

Figure 1: Front Panel Layout (ST-01 PRO)

1. VU Meter: Displays audio signal level, providing a vintage visual experience.
2. Input Channel Indicator: Lights up to show the currently selected input (BT, RCA, OPT, COA, PC-USB).
3. Power Switch / Input Switch / Volume Knob:
   • Premeu per engegar / apagar.
   • Gira per ajustar el volum.
   • Press briefly to cycle through input sources.
4. Pom de baix: Ajusta la sortida de baixa freqüència.
5. Pom treble: Ajusta la sortida d'alta freqüència.
6. Infrared (IR) Receiver: Per a ordres de control remot.

4.2 Connexions del panell posterior

The rear panel provides all necessary audio input and output ports.

Figure 2: Rear Panel Layout (ST-01 PRO)

• BT (Bluetooth Antenna Port): Connect the provided Bluetooth antenna here.
• USB (U-disk Input): For playing lossless audio files from a USB flash drive (ST-01 PRO only).
• RCA (L/R Audio Input): Connect analog audio sources using RCA cables.
• COA (Coaxial Input): Connecteu fonts d'àudio digital mitjançant un cable coaxial.
• OPT (Optical Input): Connect digital audio sources using an optical (Toslink) cable.
• PC-USB Input: Connect to a computer for use as an external DAC.
• LINE OUT (3.5mm AUX Output): Connecta't a un altre amplifier, active speakers, or a subwoofer.
• SPEAKER OUTPUT (Banana Speaker Jacks): Connecteu altaveus passius.
• DC 18V-30V Power Input: Connect the DC power adapter.

5. Instruccions de configuració

5.1 Desembalatge i col·locació

1. Traieu amb cura tots els components de l'embalatge.
2. Col·loca el amplifier on a stable, flat surface with adequate ventilation.
3. Ensure the vacuum tubes are securely seated in their sockets.
4. Attach the Bluetooth antenna to the BT port on the rear panel.

5.2 Connectar altaveus

El amplifier supports passive speakers with an impedance of 3-8Ω.

1. Connect your passive speakers to the "SPEAKER OUTPUT" banana jacks on the rear panel.
2. Ensure correct polarity: connect the red (+) terminal of the amplifier to the red (+) terminal of the speaker, and the black (-) terminal of the amplifier to the black (-) terminal of the speaker.

Figura 3: Amplifier connected to passive speakers.

5.3 Connexió de fonts d'àudio

Trieu un dels mètodes d'entrada següents:

• Bluetooth 5.0: Pair your Bluetooth-enabled device (phone, tablet, etc.) with the ampmés viu.
• USB (PC-USB): Connecteu el amplifier to your computer using the provided USB cable. The amplifier will act as an external sound card. (Supports XP/W7/W8/W10/MAC/Linux).
• U-disk (ST-01 PRO only): Insert a USB flash drive (max 64GB) containing MP3, WAV, WMA, FLAC, APE audio files al port USB del panell posterior.
• Coaxial/Òptic: Connect digital audio sources like TVs, CD players, or game consoles using coaxial or optical cables.
• RCA: Connect analog audio sources such as CD players, tuners, or preampLificadors mitjançant cables RCA.

Figure 4: Multiple digital audio inputs.

5.4 Connexió d'alimentació

1. Ensure all audio connections are made before connecting power.
2. Connect the DC power adapter to the "DC 18V-30V" input on the rear panel.
3. Connecteu l'adaptador de corrent a una presa de corrent adequada.

6. Instruccions de funcionament

6.1 Encès/Apagat

Press the main volume knob on the front panel to power the unit on or off.

6.2 Selecció d'entrada

Briefly press the main volume knob to cycle through the available input sources (Bluetooth, RCA, Optical, Coaxial, PC-USB, U-disk). The corresponding input indicator on the front panel will light up.

Alternatively, use the "MODE" button on the remote control to select the input source.

6.3 Control de volum

Rotate the main volume knob clockwise to increase volume and counter-clockwise to decrease it. You can also use the volume up/down buttons on the remote control.

Nota:

• When the volume is turned down to minimum, the BT/(USB) indicator will flash.
• When the volume is turned up to maximum, the PC-USB indicator will flash.
• The indicator of the current input channel will go out during adjustment but will light up again when adjustment stops.

6.4 Tone Control (Bass/Treble)

Use the "BASS" and "TREBLE" knobs on the front panel to adjust the low and high frequencies to your preference. The adjustment range is ±6dB.

Figure 5: Tone control knobs.

6.5 VU Meter Sensitivity Adjustment (ST-01 PRO only)

The ST-01 PRO features a sensitivity adjustment for the VU meter located on its bottom. This allows you to match the VU meter's response better with different input signals for optimal visual effect.

Figure 6: VU Meter with sensitivity adjustment.

6.6 U-disk Playback (ST-01 PRO only)

Insert a USB flash drive containing supported audio formats (MP3, WAV, WMA, FLAC, APE) into the USB port on the rear panel. Select the U-disk input using the input switch. The amplifier will automatically begin playback.

6.7 Control remot

The included remote control allows for convenient operation from a distance. It can control power, input selection, volume, and mute functions.

Figura 7: Amplificador amb comandament a distància.

Nota:

• The remote control requires 2*AAA batteries (not included).
• Point the remote control towards the IR receiver on the front panel.

7. Especificacions

8. Solució De Problemes

• Sense so:
  • Check all cable connections (power, speakers, audio sources).
  • Assegureu-vos que s'ha seleccionat la font d'entrada correcta.
  • Verify volume levels on both the amplificador i la font d'àudio.
  • Comproveu si el amplifier is muted (if applicable via remote).
• So distorsionat:
  • Reduïu el nivell de volum.
  • Check speaker impedance compatibility (3-8Ω).
  • Ensure audio cables are not damaged or loose.
• Problemes de vinculació de Bluetooth:
  • Assegureu-vos el amplifier is in Bluetooth input mode.
  • Delete previous pairings on your device and try pairing again.
  • Apropa el dispositiu a la ampmés viu.
• VU Meter Not Responding (ST-01 PRO):
  • Adjust the VU meter sensitivity on the bottom of the unit.
  • Ensure an audio signal is present.
• El control remot no funciona:
  • Comproveu i substituïu les piles AAA.
  • Assegureu-vos que no hi hagi obstruccions entre el comandament a distància i el ampreceptor d'infrarojos del lifer.
  • Apunta el comandament a distància directament al receptor d'infrarojos.

9. Manteniment

• Neteja: Utilitzeu un drap suau i sec per netejar l'exterior ampNo utilitzeu netejadors líquids ni dissolvents.
• Vacuum Tube Replacement: El amplifier uses pluggable 6K4 vacuum tubes. These can be replaced with compatible tubes such as 6J1, 6J2, 6J3, 6J4, 6J5, 6"1N, 6*4N, 6*5N, 5654/5654W, 5725, 6AK5, EF95, 6BA6, 403B. Ensure the amplifier is powered off and unplugged before replacing tubes. Handle tubes carefully as they can be fragile.

10. Consells d'usuari

• Font d'alimentació: El amplifier typically includes a DC 24V power adapter. Ensure it is connected correctly. The unit operates within a DC 18-30V range.
• Mobile Phone Connectivity: For PC-USB input with mobile phones, Android devices may require an OTG cable, and iOS devices may require a camera kit. These accessories are not included.
• Tube Rolling: Experimenting with different compatible vacuum tubes (e.g., 5654/5654W) can subtly alter the sound signature to suit personal preferences. Always ensure the amplifier is off and unplugged before swapping tubes.

11. Garantia i Suport

For warranty information, technical support, or service inquiries, please refer to the seller's policies or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.

12. Vídeo de demostració del producte

Watch this video for a visual demonstration of the Douk Audio ST-01 PRO amplifier's features and operation.

Video: Douk Audio ST-01 PRO Amplifier in action, showcasing its design, connections, and VU meter.