Nobsound DA7-rør Amplivligere brugervejledning

1. Introduktion

The Nobsound DA7 is a high-fidelity tube amplifier designed to deliver a rich and warm audio experience. Featuring a combination of 6P1 and 6N1 vacuum tubes, Bluetooth 5.3 connectivity, and a USB input, this integrated amplifier is suitable for audiophiles seeking exceptional sound quality for their home audio systems. Its robust design includes a toroidal power transformer and an imported broadband EI output transformer, ensuring stable and powerful performance. Dual VU meters provide real-time signal monitoring, enhancing the user experience.

2. Sikkerhedsinstruktioner

• Sørg altid for amplifier is powered off and unplugged before making any connections or performing maintenance.
• Udsæt ikke amplifier to water, moisture, or excessive heat.
• Ensure adequate ventilation around the unit to prevent overheating, especially around the vacuum tubes.
• Åbn ikke ampliber casing. There are no user-serviceable parts inside, and doing so may expose you to dangerous voltages.
• Brug kun den angivne effektvolumentage (110V or 220V, depending on your model) to avoid damage.
• Opbevares utilgængeligt for børn.

3. Produktet er slutview

3.1. Kontroller på frontpanelet

1. Afbryderen: Drejer amplivligere til eller fra.
2. VU Detection Table: Two analog VU meters that automatically detect and display the signal strength.
3. Previous/Play/Pause/Next Knob: Controls playback for USB input (previous track, play/pause, next track).
4. Input Select Knob: Selects the audio input source (USB, BT, AUX, CD).
5. Volumenkontrolknap: Justerer den samlede udgangslydstyrke.

3.2. Bagpaneltilslutninger

1. Signal Input Terminal (CD IN, AUX IN, PRE OUT): RCA L/R inputs for external audio sources (CD, AUX) and a PRE OUT for connecting to another amplifier eller powered subwoofer.
2. Audio Output (PRE OUT): RCA L/R output for pre-ampforstærket signal.
3. USB-grænseflade: USB 3.0 port for connecting a USB flash drive for digital audio playback.
4. Antenna Interface (BT ANT): Stik til Bluetooth-antennen.
5. Right Channel Horn Terminal: Speaker output terminal for the right channel.
6. Left Horn Terminal: Speaker output terminal for the left channel.
7. Stikkontakt: AC power input for the amplivligere.

3.3. Interne komponenter og funktioner

• Vakuumrør: De amplifier utilizes four Beijing 6P1 vacuum tubes for the power amplivligere stage and three Beijing 6N1 vacuum tubes for the voltage amplifier and push stage, contributing to its characteristic warm and natural sound.
• Bluetooth 5.3: Equipped with an Actions' high-quality decoding chip (ATS2S53), supporting V5.3/5.0/4.2/2.1+EDR for fast, stable, and lossless Bluetooth audio streaming with excellent 24BITDAC processing.
• USB 3.0-indgang: Supports USB 3.0 U disks (FAT32, EXFAT file system) up to 128GB (no partition required). Compatible with MP3, WAV, APE, FLAC, AAC, WMA audio formats.
• Toroidal Power Transformer: Specially developed for stable and efficient power delivery.
• EI Output Transformer: Imported broadband EI output transformer for superior audio performance.
• Tube Protection Net Cover: A thickened steel net cover protects the fragile glass tubes and aids in quick cooling and heat dissipation.
• Pure Copper Gold-Plated Interfaces: Ensures better conductivity and convenient, reliable connections for various audio sources.

4. Opsætning

4.1. Udpakning og placering

• Fjern forsigtigt ampfjerner fra emballagen.
• Placer ampOpbevar apparatet på en stabil, plan overflade væk fra direkte sollys, varmekilder og fugt.
• Ensure there is sufficient space around the unit for proper ventilation, especially above the vacuum tubes.
• Install the tube protection net cover over the tubes.

4.2. Tilslutning af højttalere

Connect your passive speakers to the Left and Right Channel Horn Terminals (5 and 6 on the rear panel). Ensure correct polarity (positive to positive, negative to negative) and that your speakers' impedance matches the amplifier's output impedance (4Ω or 8Ω).

4.3. Tilslutning af lydkilder

• CD/AUX Input: Use RCA cables to connect your CD player, DAC, or other analog audio sources to the 'CD IN' or 'AUX IN' RCA ports (1 on the rear panel).
• USB-indgang: Insert a USB 3.0 flash drive (formatted to FAT32 or EXFAT, max 128GB, no partitions) containing compatible audio files (MP3, WAV, APE, FLAC, AAC, WMA) into the 'USB' interface (3 on the rear panel).
• Bluetooth-antenne: Screw the provided Bluetooth antenna into the 'BT ANT' interface (4 on the rear panel).

4.4. Strømtilslutning

Connect the power cable to the 'Power Outlet' (7 on the rear panel) and then plug it into a suitable AC power supply (110V or 220V, depending on your amplifier's specific model and region).

5. Betjeningsvejledning

5.1. Tænd/sluk

Press the 'Power Switch' (1 on the front panel) to turn the amplifier on or off. Allow a few moments for the tubes to warm up after powering on.

5.2. Valg af inputkilde

Rotate the 'Input Select Knob' (4 on the front panel) to choose your desired audio source: USB, BT (Bluetooth), AUX, or CD.

5.3. Justering af lydstyrke

Turn the 'Volume Control Knob' (5 on the front panel) clockwise to increase volume and counter-clockwise to decrease it.

5.4. Bluetooth-parring

• Select 'BT' using the Input Select Knob.
• Søg efter tilgængelige Bluetooth-enheder på din Bluetooth-aktiverede enhed (f.eks. smartphone, tablet).
• Select 'Nobsound DA7' (or similar name) from the list to pair. Once paired, audio from your device will stream to the amplivligere.

5.5. USB-afspilning

• Insert your USB flash drive into the USB interface on the rear panel.
• Select 'USB' using the Input Select Knob.
• Use the 'Previous/Play/Pause/Next Knob' (3 on the front panel) to control playback of your audio files.

5.6. VU-målerfunktion

The two VU meters on the front panel automatically monitor and display the signal strength of the audio passing through the amplifier, providing a visual representation of your music's dynamics.

6. Specifikationer

7. Fejlfinding

• Ingen strøm: Sørg for, at strømkablet er korrekt tilsluttet til begge amplifier and the wall outlet. Check the power switch position.
• Ingen lyd: Verify that speakers are correctly connected and that the input source is selected. Check volume levels on both the amplifier and the source device. Ensure all cables are securely connected.
• Forvrænget lyd: Check speaker connections and impedance. Reduce the volume if it's too high. Ensure the audio source is not overdriving the input.
• Problemer med Bluetooth-forbindelse: Ensure the Bluetooth antenna is attached. Make sure the amplifier is in Bluetooth input mode. Try unpairing and re-pairing the device. Ensure no other devices are actively connected to the amplifier via Bluetooth.
• USB Playback Failure: Ensure the USB drive is formatted to FAT32 or EXFAT and contains supported audio file types. Check that the USB drive is not larger than 128GB and has no partitions.
• Summende/Summende støj: This can sometimes be caused by ground loops. Try plugging the amplifier and source components into the same power strip. Ensure all cables are shielded and in good condition.

8. Vedligeholdelse

• Rensning: Brug en blød, tør klud til at rengøre ydersiden af ampBrug ikke flydende rengøringsmidler eller slibende materialer.
• Rørpleje: The vacuum tubes have a finite lifespan. While they are protected by a net cover, avoid touching them when hot. If a tube fails, it may need to be replaced by a qualified technician.
• Ventilation: Sørg altid for amplifier has proper airflow to prevent heat buildup, which can shorten the lifespan of components.
• Opbevaring: Hvis du opbevarer amplifier for an extended period, disconnect it from power, allow it to cool, and store it in a dry, dust-free environment.

9. Brugertips

Bemærk: Ingen specifik brugeranmodningviews or Q&A content were provided for this product. The following are general tips for tube amplifier brugere.

• Opvarmningstid: Allow your tube amplifier a few minutes to warm up after powering on for optimal sound quality. The tubes need to reach their operating temperature.
• Rørvalsning: For advanced users, experimenting with different brands or types of compatible vacuum tubes (known as 'tube rolling') can subtly alter the amplifier's sound characteristics. Always consult a professional before attempting this.
• Højttalermatchning: Sørg for, at dine højttalere er godt afstemt med amplifier's power output and impedance for the best performance and to prevent damage.
• Kildekvalitet: The quality of your audio source (e.g., high-resolution digital files, good quality DAC) will significantly impact the overall sound experience.

10. Garanti og support

For garantioplysninger, teknisk support eller serviceforespørgsler, kontakt venligst sælgeren eller producenten direkte. Gem din købskvittering som købsbevis.