Douk Audio P2 Mini Bluetooth 5.0 Vacuum Tube Preamp Manual d'usuari

1. Introducció

This manual provides detailed instructions for the operation and maintenance of your Douk Audio P2 Mini Bluetooth 5.0 Vacuum Tube Preamp. Please read this manual thoroughly before using the device to ensure proper functionality and to maximize your audio experience. This device combines a vacuum tube preamplifier, a HiFi USB player, and a stereo audio headphone amplifier, offering versatile connectivity options including Bluetooth 5.0, RCA, USB, and TF card inputs.

2. Informació de seguretat

Font d'alimentació: Use only the provided power adapter. Using an incompatible power supply may damage the device and void the warranty.
Ventilació: Assegureu-vos que hi hagi una ventilació adequada al voltant de la unitat. No bloquegeu les obertures de ventilació.
Humitat: Mantingueu el dispositiu allunyat de l'aigua, la humitat i els ambients amb molta humitat.
Calor: Eviteu col·locar la unitat a prop de fonts de calor o sota la llum solar directa.
Handling Tubes: Vacuum tubes can become hot during operation. Exercise caution when handling or replacing them.
Neteja: Desconnecteu l'alimentació abans de netejar. Feu servir un drap suau i sec. No utilitzeu netejadors líquids ni aerosols.
Manteniment: No intenteu fer el manteniment de la unitat vosaltres mateixos. Encarregueu totes les tasques de manteniment a personal qualificat.

3. Contingut del paquet

Verifiqueu que tots els elements siguin presents al paquet:

1x Douk Audio P2 Preamp Unitat
1x Power Supply Adapter (DC 12V)
1x Bluetooth Antenna
2x 6K4 Vacuum Tubes
1x comandament a distància
1 x manual d'instruccions

Douk Audio P2 Preamp package contents including the unit, power supply, antenna, tubes, remote, and manual. — Image 3.1: Contents of the Douk Audio P2 package. This image displays the main unit, power adapter, Bluetooth antenna, two 6K4 vacuum tubes, a remote control, and the instruction manual.

4. Producte acabatview

The Douk Audio P2 is a compact and versatile audio device designed to enhance your listening experience. It features multiple input options and a vacuum tube stage for a warm, rich sound.

4.1 Controls i connexions del tauler frontal

Davant view of the Douk Audio P2 Preamp showing controls and inputs. — Image 4.1: Front panel of the Douk Audio P2. Visible elements include the USB port, TF card slot, IR receiver, 3.5mm headphone output, and rotary knobs for Bass, Mid, and Treble tone control.

Entrada de targeta TF: Slot for TransFlash (MicroSD) cards for media playback.
Entrada USB: USB-A port for connecting USB flash drives for media playback.
Receptor IR: Receptor d'infrarojos per al comandament a distància.
Sortida d'auriculars: Jack de 3.5 mm per connectar auriculars.
Pom de baix: Ajusta els nivells d'àudio de baixa freqüència.
Pom central: Ajusta els nivells d'àudio de freqüència mitjana.
Pom treble: Ajusta els nivells d'àudio d'alta freqüència.
Input Selection Buttons: Buttons for selecting input sources (RCA, BT, USB, TF).
Botó d'encesa/selecció: Powers the unit on/off and cycles through inputs.

4.2 Connexions del panell posterior

posterior view of the Douk Audio P2 Preamp showing input and output connections. — Image 4.2: Rear panel of the Douk Audio P2. This view shows the RCA input (left and right), RCA output (left and right), DC 12V power input, and the Bluetooth antenna connector.

Connector d'antena Bluetooth: Per connectar l'antena Bluetooth inclosa.
Entrada RCA (E/D): Stereo analog audio input for connecting external audio sources.
Sortida RCA (E/D): Stereo analog audio output for connecting to an amplifier o altaveus actius.
Entrada d'alimentació DC 12V: Per connectar l'adaptador de corrent.

5. Configuració

Seguiu aquests passos per a la configuració inicial:

Instal·leu els tubs de buit: Carefully insert the two 6K4 vacuum tubes into their sockets on the top of the unit. Ensure they are seated firmly.
Connecteu l'antena Bluetooth: Cargoleu l'antena Bluetooth subministrada al connector del panell posterior.
Connecta la sortida d'àudio: Connect the RCA output jacks (L/R) on the rear panel to your ampamplificador o altaveus actius mitjançant cables RCA.
Connect Audio Input (Optional): If using an external analog source (e.g., CD player), connect its RCA output to the RCA input jacks (L/R) on the rear panel.
Connectar l'alimentació: Connect the DC 12V power adapter to the power input on the rear panel, then plug the adapter into a wall outlet.
Encès: Press the Power/Select button on the front panel or the power button on the remote control to turn on the unit.

Diagram showing connections for the Douk Audio P2 Preamp. — Image 5.1: Connection diagram for the Douk Audio P2. This diagram illustrates how to connect the power supply, Bluetooth antenna, RCA input from a source device, and RCA output to an amplifier o altaveus actius.

6. Instruccions de funcionament

6.1 Selecció d'entrada

Use the input selection buttons on the front panel or the remote control to switch between available audio sources:

RCA: For external analog audio sources connected via RCA cables.
BT (Bluetooth): For wireless audio streaming from Bluetooth-enabled devices.
USB: For audio playback from a USB flash drive.
TF: For audio playback from a TF (MicroSD) card.

6.2 Funcionament Bluetooth

Select the "BT" input using the front panel button or remote. The Bluetooth indicator LED will flash.
Al dispositiu mòbil o a l'ordinador, activeu el Bluetooth i cerqueu els dispositius disponibles.
Select "Douk Audio P2" from the list to pair. Once paired, the Bluetooth indicator LED will remain solid.
You can now stream audio wirelessly to the P2.

Close-up of the Bluetooth 5.0 chip. — Image 6.1: Detail of the Bluetooth 5.0 chip, highlighting the wireless connectivity feature of the device.

Reproducció de targetes USB/TF de 6.3

Inseriu una unitat flaix USB al port USB o una targeta TF a la ranura per a targetes TF.
Select the "USB" or "TF" input using the front panel button or remote.
The unit will automatically begin playing supported audio files (MP3, APE, FLAC, WAV, WMA).
Use the remote control for playback functions (play/pause, next/previous track).

Close-up of the USB and TF card inputs on the front panel. — Imatge 6.2: Primer pla view of the USB and TF card input slots on the front panel, indicating their location for media playback.

Douk Audio P2 functioning as a digital player with USB and TF card inputs. — Image 6.3: The Douk Audio P2 shown in a home entertainment setup, illustrating its use as a digital player with USB and TF card inputs for various audio formats like MP3, APE, FLAC, WAV, and WMA.

6.4 Auriculars AmpFunció lifier

Connect your headphones to the 3.5mm headphone jack on the front panel. The P2 will amplify the selected audio source for private listening. The RCA output remains active, allowing simultaneous output to speakers and headphones.

Douk Audio P2 used as a headphone ampmés viu. — Image 6.4: A user enjoying music through headphones connected to the Douk Audio P2, demonstrating its function as a headphone ampmés viu.

6.5 PreampFunció lifier

The P2 acts as a preamplifier, processing the audio signal through its vacuum tube stage before sending it to your main amplifier or active speakers via the RCA output. This tube stage is designed to add warmth and richness to the audio.

Douk Audio P2 used as a tube preamp in an audio setup. — Image 6.5: The Douk Audio P2 integrated into an audio system, connected between an audio source and speakers, illustrating its role as a tube preampmés viu.

Control de 6.6 tons

Adjust the Bass, Mid, and Treble rotary knobs on the front panel to fine-tune the audio output to your preference. These controls allow for independent adjustment of different frequency ranges.

Close-up of the Bass, Mid, and Treble tone control knobs. — Imatge 6.6: Primer pla view of the Bass, Mid, and Treble control knobs on the front panel, indicating their function for independent tone adjustment.

6.7 Control remot

The included remote control provides convenient access to power, input selection, volume adjustment, and media playback controls.

Image of the remote control for the Douk Audio P2. — Image 6.7: The remote control for the Douk Audio P2, showing buttons for power, input selection, volume, and media playback.

7. Manteniment

7.1 Neteja

To clean the unit, first disconnect it from the power outlet. Use a soft, dry, lint-free cloth to wipe the exterior surfaces. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the finish or internal components.

7.2 Substitució del tub

The 6K4 vacuum tubes are designed to be user-replaceable. If you wish to experiment with different compatible tubes (e.g., 6J1, 6J4, GE5654, 6AK5, 6*1n) or if a tube needs replacement:

Ensure the unit is powered off and unplugged from the wall outlet. Allow the tubes to cool completely before handling.
Gently grasp the top of the tube and pull it straight up from its socket. Avoid twisting or bending the pins.
Align the pins of the new tube with the holes in the socket. Carefully push the new tube straight down until it is firmly seated.
Torneu a connectar l'alimentació i proveu la unitat.

Close-up of a 6K4 vacuum tube inserted into the preamp. — Image 7.1: A close-up of one of the 6K4 vacuum tubes glowing when inserted into the Douk Audio P2, illustrating the tube component.

8. Solució De Problemes

Problema	Causa possible	Solució
Sense poder	Power adapter not connected; power outlet not active.	Assegureu-vos que l'adaptador de corrent estigui connectat correctament a la unitat i a una presa de corrent que funcioni.
Sense sortida de so	Entrada incorrecta seleccionada; cables solts; amplifier/speakers off; volume too low.	Verify correct input source. Check all audio cable connections. Ensure connected amplifier/speakers are powered on and volume is adequate.
Bluetooth no emparellat	La unitat no està en mode d'emparellament; el dispositiu és massa lluny; interferències.	Ensure "BT" input is selected and LED is flashing. Move device closer to the P2. Restart Bluetooth on your device.
La targeta USB/TF no es reprodueix	Entrada incorrecta seleccionada; no compatible file format; suports d'emmagatzematge corruptes.	Seleccioneu l'entrada "USB" o "TF". Assegureu-vos files are supported (MP3, APE, FLAC, WAV, WMA). Try a different USB drive/TF card. Note: USB drives larger than 32GB may not be fully supported.
Static or humming noise	Ground loop; faulty cables; tube issue.	Check cable connections. Try a different power outlet. Allow tubes to warm up. If persistent, consider replacing tubes.

9. Especificacions

Marca: Douk Audio
Model: P2
Tecnologia de connectivitat: Bluetooth 5.0, RCA, USB, TF Card
Dispositius compatibles: Personal Computer, Television, Speaker, Mobile Phones, CD/MP3 Players
Tipus de connector: 3.5mm Jack (Headphone Out), RCA (Input/Output)
Codificació d'àudio: estèreo
Mode de sortida d'àudio: estèreo
Nombre de canals: 2
Tubs de buit: 2x 6K4 (replaceable with 6J1, 6J4, GE5654, 6AK5, 6*1n)
Entrada d'alimentació: DC 12V
Dimensions (L x A x A): Approximately 128mm x 115mm x 33mm (5.04 x 4.53 x 1.30 inches)
Pes de l'article: Aproximadament 420 g (0.93 lliures)
Supported USB/TF Card Capacity: Up to 32GB (for optimal performance)
Supported Audio Formats (USB/TF): MP3, APE, FLAC, WAV, WMA

Dimensions of the Douk Audio P2 Preamp. — Image 9.1: Diagram showing the dimensions of the Douk Audio P2 unit: 128mm (length), 115mm (width), and 33mm (height).

10. Garantia i Suport

Douk Audio products are designed for reliability and performance. For warranty information and technical support, please refer to the official Douk Audio weblloc web o poseu-vos en contacte amb el vostre distribuïdor. Conserveu el rebut de compra com a comprovant de compra per a reclamacions de garantia.

Oficial Weblloc: www.doukaudio.com

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