1. Introducció
This manual provides detailed instructions for the proper setup, operation, and maintenance of your Douk Audio A5 TPA3255 Stereo Amplifier. Please read this manual thoroughly before using the product to ensure optimal performance and safety. The Douk Audio A5 is a high-fidelity Class D power amplifier designed for home stereo and theater audio systems, offering powerful and clear sound reproduction for passive bookshelf or tower speakers.
2. Informació de seguretat
- Font d'alimentació: Use only the provided power adapter or one with identical specifications (DC 24V-48V). Incorrect voltagi pot danyar el dispositiu.
- Ventilació: Assegureu-vos una ventilació adequada al voltant amplifier. Do not block ventilation openings. Avoid placing the unit in enclosed spaces or on soft surfaces that may impede airflow.
- Humitat: Mantenir el amplifier away from water, moisture, and high humidity environments. Do not operate with wet hands.
- Calor: El casing may become warm during operation, which is normal. Avoid placing the unit near heat sources or in direct sunlight.
- Manipulació: Manipuleu la unitat amb cura. Eviteu deixar-la caure ni sotmetre-la a impactes forts.
- Manteniment: Do not attempt to open or repair the unit yourself, except for specified user-serviceable parts like op-amps. Refer all servicing to qualified personnel.
3. Què hi ha a la caixa
En desempaquetar, comproveu que hi hagi tots els elements següents:
- 1 x Douk Audio A5 Ampmés viu
- 1 x adaptador d'alimentació DC 32V/5A
- 1 x Manual d'usuari (aquest document)
4. Producte acabatview
4.1 Controls del panell frontal
Image: Front panel of the Douk Audio A5 ampmés viu.
The front panel features two main control knobs and a power button. The left knob controls the High-Pass Filter (HPF) frequency, ranging from 30Hz to 200Hz, with an 'off' position. The right knob serves as both the power on/off switch and the volume control.
4.2 Connexions del panell posterior
Image: Rear panel connections of the Douk Audio A5 ampmés viu.
The rear panel provides all necessary input and output connections:
- AUDIO IN (RCA): Stereo RCA input for connecting audio sources like CD players, DACs, or preampaixecadors.
- AUX OUT (3.5mm): 3.5mm auxiliary output, typically used for connecting to an active subwoofer.
- SPK OUT (Speaker Terminals): Gold-plated binding posts for connecting passive speakers. Ensure correct polarity (red for positive, black for negative).
- DC 24V-48V: Power input for the DC power adapter.
4.3 Internal Components and Op-Amp Rodant
Imatge: Interna view of the Douk Audio A5, highlighting the op-amp endolls.
The Douk Audio A5 features a transparent top panel, allowing visibility of the internal circuitry. This design also facilitates easy access to the op-amp sockets for users who wish to customize the sound profile by 'op-amp rolling'.
4.4 LED Ambiance and PFFB Technology
Image: Internal LED lighting and color selection DIP switches.
El amplifier includes adjustable internal LED lighting with multiple color options, controlled by DIP switches located on the circuit board. This allows for aesthetic customization. The unit also incorporates Post-Filter Feedback (PFFB) technology and a 4-layer immersion gold PCB, which contribute to reduced distortion, improved frequency response, and efficient heat management.
4.5 Dissipació de calor
Image: Heat dissipation pathways of the ampmés viu.
El amplifier's design includes advanced full-body heat dissipation to ensure stable performance even during prolonged high-power output. It is normal for the casing to become warm during operation.
5. Instruccions de configuració
Follow these steps to set up your Douk Audio A5 ampmés viu:
- Connectar els altaveus: Connect your passive speakers to the 'SPK OUT' binding posts on the rear panel. Ensure that the positive (+) terminal of the amplifier connects to the positive terminal of the speaker, and the negative (-) terminal connects to the negative terminal. Tighten the binding posts securely. The amplifier supports speakers with an impedance of 4Ω to 8Ω.
- Connecta la font d'àudio: Connect your audio source (e.g., CD player, DAC, computer) to the 'AUDIO IN' RCA inputs on the rear panel using appropriate RCA cables.
- (Optional) Connect Subwoofer: If using an active subwoofer, connect its input to the 'AUX OUT' 3.5mm jack on the amplifier using a 3.5mm audio cable.
- Connectar l'alimentació: Connect the provided DC 32V/5A power adapter to the 'DC 24V-48V' input on the rear panel. Then, plug the power adapter into a wall outlet.
- Encès: Turn the right knob on the front panel clockwise to power on the amplifier. The internal LEDs will illuminate.
Vídeo de demostració de configuració
Video: A demonstration of the Douk Audio A5 amplifier's features and setup, including internal component access and LED lighting.
6. Instruccions de funcionament
6.1 Funcionament bàsic
- Encès/apagat: Rotate the right knob clockwise to turn on the amplifier. Rotate it counter-clockwise until it clicks to turn off.
- Control de volum: Adjust the right knob clockwise to increase volume and counter-clockwise to decrease volume.
6.2 High-Pass Filter (HPF) Adjustment
Image: High-Pass Filter control and its effect on frequency response.
The left knob controls the High-Pass Filter. This feature allows you to cut off low frequencies from your main speakers, which is particularly useful when using an active subwoofer. By filtering out low frequencies from your main speakers, you can improve their clarity and allow the subwoofer to handle the bass more effectively.
- Rotate the left knob to select a cutoff frequency between 30Hz and 200Hz.
- Set the knob to 'off' to bypass the HPF and allow full-range audio to your main speakers.
6.3 Op-Amp Replacement (Op-Amp Rolling)
Image: Demonstrating op-amp replacement using tweezers.
The Douk Audio A5 allows for easy replacement of operational amplificadors (op-amps) to customize the amplifier's sound characteristics. This process is known as 'op-amp rolling'.
- Apagueu i desconnecteu: Assegureu-vos el ampEl lificador està apagat i desconnectat de la font d'alimentació.
- Remove Top Panel: Carefully lift the transparent top panel to access the internal circuit board.
- Remove Existing Op-Amps: Using a suitable tool (e.g., IC extractor or small flat-head screwdriver), gently pry up the existing op-amp chips from their sockets. Be careful not to bend the pins.
- Insert New Op-Amps: Align the pins of the new op-amp chips with the sockets. Ensure the orientation (usually indicated by a dot or notch on the chip and socket) is correct. Gently press the op-amps into place until they are fully seated.
- Replace Top Panel: Carefully place the transparent top panel back onto the ampmés viu.
- Reconnect Power and Test: Reconnect the power supply and power on the amplifier to test the new op-amps.
Note: Only replace op-amps with compatible models. Refer to online resources or consult with audio experts if unsure.
6.4 Adjusting LED Colors
The internal LED lighting can be adjusted to various colors using DIP switches on the circuit board. To change the color:
- Apagueu i desconnecteu: Assegureu-vos el ampEl lificador està apagat i desconnectat de la font d'alimentació.
- Remove Top Panel: Carefully lift the transparent top panel.
- Locate DIP Switches: Identify the small DIP switches on the circuit board, typically labeled 1, 2, 3, and R, G, B.
- Adjust Switches: Use a small tool (like tweezers or a pen tip) to toggle the switches to achieve your desired color combination. Refer to the diagram on the circuit board or in the image above for specific color settings.
- Replace Top Panel: Carefully place the transparent top panel back onto the ampmés viu.
- Torneu a connectar l'alimentació: Reconnect the power supply and power on the amplifier to see the new LED color.
7. Manteniment
- Neteja: Utilitzeu un drap suau i sec per netejar l'exterior ampNo utilitzeu netejadors líquids ni materials abrasius.
- Emmagatzematge: Quan no s'utilitzi durant períodes prolongats, guardeu-lo ampGuardar en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
- Ventilació: Regularly check that the ventilation holes are free from dust and debris to prevent overheating.
8. Solució De Problemes
If you encounter any issues with your Douk Audio A5 amplifier, please refer to the following troubleshooting guide:
| Problema | Causa possible | Solució |
|---|---|---|
| Sense poder | L'adaptador de corrent no està connectat o està defectuós; la presa de corrent no funciona. | Assegureu-vos que l'adaptador de corrent estigui connectat correctament a tots dos amplifier and a working power outlet. Test the outlet with another device. |
| Sense sortida de so | Incorrect speaker connections; audio source not connected or playing; volume too low; incorrect input selection (if applicable). | Check all speaker and audio source connections for proper seating and polarity. Ensure the audio source is playing and the amplifier volume is turned up. |
| So distorsionat | Volume too high; faulty cables; incorrect speaker impedance; damaged speakers. | Reduce the volume. Check audio cables for damage and replace if necessary. Ensure your speakers' impedance is compatible (4-8Ω). Test with different speakers if possible. |
| So intermitent | Loose connections; faulty cables; overheating. | Check all connections. Ensure the ampEl ventilador té una ventilació adequada per evitar el sobreescalfament. |
| HPF not working | HPF knob set to 'off'. | Rotate the left HPF knob to a frequency setting (e.g., 30Hz, 80Hz, 200Hz) instead of 'off'. |
If the problem persists after trying these solutions, please contact Douk Audio customer support for further assistance.
9. Especificacions
Image: Output power table for Douk Audio A5.
| Característica | Especificació |
|---|---|
| Model | A5 |
| Marca | Douk Audio |
| Nombre de canals | 2 |
| AmpXip lificador | TPA3255 |
| Output Power (32V/5A) | 78W+78W (4Ω), 71W+71W (6Ω), 65W+65W (8Ω) |
| Output Power (36V/6A) | 107W+107W (4Ω), 100W+100W (6Ω), 94W+94W (8Ω) |
| Output Power (48V/5A) | 120W+120W (4Ω), 110W+110W (6Ω), 102W+102W (8Ω) |
| Output Power (48V/10A) | 250W+250W (4Ω), 210W+210W (6Ω), 185W+185W (8Ω) |
| Filtre de pas alt (HPF) | Adjustable 30-200Hz |
| Sensibilitat d'entrada | 0.775 V |
| Resposta de freqüència | 20 Hz-20 kHz (± 0.5 dB) |
| SNR | ≥108 dB |
| THD | 0.002% |
| Impedància de l'altaveu | 4-8Ω |
| Entrada d'àudio | RCA estèreo |
| Sortida d'àudio | Speaker Terminals, 3.5mm AUX Out |
| Voltage | DC 24V-48V |
| Dimensions (W*D*H) | 102 mm x 130 mm x 33 mm (4.02 polzades x 5.12 polzades x 1.30 polzades) |
| Pes net | 506 g (1.12 lliures) |
| Material | Alumini |
10. Garantia i Suport
10.1 Informació de la garantia
Douk Audio products typically come with a standard manufacturer's warranty. Please refer to the warranty card included with your product or visit the official Douk Audio weblloc web per conèixer els termes i condicions específiques de la garantia. Conserveu el rebut de compra com a comprovant de compra per a reclamacions de garantia.
10.2 Atenció al client
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Douk Audio customer support. You can usually find contact information on the official Douk Audio weblloc web o a través del venedor on vau comprar el producte.
Recursos en línia:
- Visita el Douk Audio Store on Amazon per a informació i actualitzacions del producte.
