Nobsound HiFi 6L6 Valve Tube Amplifier (Douk Audio F5) Instruction Manual

1. Introducció

Thank you for choosing the Nobsound HiFi 6L6 Valve Tube Amplifier, model F5. This Class A single-ended tube power amplifier is designed to deliver a warm, rich, and transparent sound experience for your home stereo system. Featuring high-quality components and a robust design, it is compatible with a wide range of audio sources and passive speakers. This manual provides essential information for the safe and optimal use of your ampmés viu.

Figure 1: Nobsound HiFi 6L6 Valve Tube Amplifier (Douk Audio F5)

2. Instruccions de seguretat

• Llegiu atentament totes les instruccions abans d'utilitzar ampmés viu.
• Mantenir el amplifier away from water, moisture, and direct sunlight.
• Assegureu-vos que hi hagi una ventilació adequada al voltant de la unitat. No bloquegeu les obertures de ventilació.
• No exposar el ampLifer a temperatures o humitat extremes.
• Eviteu col·locar objectes pesats a sobre ampmés viu.
• Always disconnect the power cord from the wall outlet before cleaning or servicing.
• No intenteu obrir el amplificador casing. No hi ha peces a l'interior que l'usuari pugui reparar. Demaneu totes les tasques de manteniment a personal qualificat.
• The vacuum tubes can become very hot during operation. Avoid touching them to prevent burns.
• Assegureu-vos el amplifier is placed on a stable, level surface.

3. Contingut del paquet

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

• 1x Nobsound HiFi 6L6 Valve Tube Amplifier (Douk Audio F5)
• 1x 6N1 Tube (pre-amplifier tube)
• 2x 6L6 Tubes (power amplifier tubes)
• 1x cable d'alimentació

Figure 2: Included components and dimensions

4. Producte acabatview

4.1 Tauler frontal

Figura 3: Controls del panell frontal

• Power Switch Knob: Gira el amplificador ON o OFF.
• Pom de volum: Ajusta el nivell de volum de sortida.

4.2 Panell posterior

Figura 4: Connexions del panell posterior

• CD / AUX Input Select Button: Toggles between CD and AUX RCA inputs.
• CD / AUX Input (RCA): Two sets of stereo RCA inputs for connecting audio sources like CD players, phones, MP3 players, TVs, or computers.
• Speaker Output (Banana Jacks): Connects to passive speakers. Supports 8Ω, 4Ω, and 0Ω (common ground) speaker impedances. Ensure correct impedance matching for optimal performance and safety.
• AC IN (Power Input): Connecta el amplifier to the main power supply using the provided power cord.

5. Guia de configuració

Follow these steps to set up your Nobsound F5 ampmés viu:

1. Col·locació: Col·loca el amplifier on a stable, level surface with adequate ventilation around it. Avoid enclosed spaces.
2. Instal·lació de tubs: Carefully insert the 6N1 and 6L6 tubes into their respective sockets on the top of the amplifier. Ensure they are seated firmly but do not force them. The 6N1 tube is typically the smaller central tube, and the two 6L6 tubes are larger and flank it.
3. Connexió de l'altaveu: Connect your passive speakers to the Speaker Output terminals on the rear panel. Pay attention to polarity (+ to + and - to -) and impedance matching (8Ω, 4Ω, or 0Ω). Use high-quality speaker cables.
4. Connexió de font d'àudio: Connect your audio source (e.g., CD player, phone, computer) to either the CD or AUX RCA input jacks on the rear panel using appropriate RCA cables.
5. Connexió d'alimentació: Ensure the Power Switch Knob on the front panel is in the OFF position. Connect the provided power cord to the AC IN port on the rear panel, then plug the other end into a suitable wall outlet (AC 220V).

Figura 5: Example desktop setup

6. Instruccions de funcionament

1. Encès: Turn the Power Switch Knob to the ON position. The tubes will begin to glow, indicating the amplifier is warming up. Allow a few moments for the tubes to reach optimal operating temperature.
2. Seleccioneu l'entrada: Press the CD / AUX Input Select Button on the rear panel to choose the input corresponding to your connected audio source.
3. Ajustar el volum: Start with the Volume Knob at its minimum setting. Begin playing audio from your source, then slowly turn the Volume Knob clockwise to increase the sound level to your desired listening volume.
4. Apagar: When finished listening, turn the Volume Knob to its minimum setting, then turn the Power Switch Knob to the OFF position.

6.1 User Tips: Tube Rolling

The Nobsound F5 features a pluggable tube socket design, allowing for 'tube rolling' – the practice of swapping out tubes for different models to alter the amplifier's sound characteristics. You can experiment with compatible tubes to fine-tune the audio to your preference:

• For 6L6 tubes: Compatible alternatives include 6P3P, EL34, 6550, KT66.
• For 6N1 tube: Compatible alternatives include 6H1, ECC85.

Assegureu-vos sempre el amplifier is powered off and completely cooled down before attempting to change tubes. Handle tubes carefully to avoid damage.

7. Manteniment

• Neteja: Utilitzeu un drap suau i sec per netejar l'exterior amplifier. Do not use liquid cleaners or abrasive materials, as they may damage the finish.
• Cura del tub: Tubes have a finite lifespan. If you notice a significant degradation in sound quality or if a tube fails to light up, it may need replacement. Refer to the 'User Tips: Tube Rolling' section for compatible tube types.
• Ventilació: Comproveu regularment que les obertures de ventilació no estiguin obstruïdes per pols o deixalles.
• Emmagatzematge: Si emmagatzema el amplifier for an extended period, ensure it is kept in a cool, dry place, protected from dust and extreme temperatures.

8. Solució De Problemes

Si teniu problemes amb el vostre amplifier, please check the following before seeking professional assistance:

9. Especificacions

10. Garantia i Suport

For any questions, technical support, or warranty inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.