Nobsound L1MINI Mini Stereo Line Level Booster AmpManual d'usuari més viu

1. Introducció

The Douk Audio L1 MINI is an upgraded version of the L1, featuring a more compact size and simplified interfaces. This stereo amplifier incorporates built-in voltage impuls i amplification circuits, designed to boost the output of virtually any line level audio source (such as TV, video games, MP3 players, iPod, phone, tablet, etc.) to a maximum of 20dB. The L1 MINI offers a wide gain range, broad frequency response, excellent signal-to-noise ratio (S/R), and HiFi sound quality. Its purpose is to elevate the output level of audio devices with inherently low output, ensuring compatibility with other audio sources or enabling the use of longer cables between components without signal degradation.

2. Característiques

• Standard Input/Output Interfaces: Equipped with 3.5mm AUX and stereo RCA inputs, and stereo RCA outputs, ensuring compatibility with most low-volume audio sources like iPods, iPads, phones, TVs, MP3 players, portable CD players, computers, and video game consoles. It boosts their output to the level required to drive amplifiers o altaveus.
• Adjustable Gain and Voltage Boost Circuit: Features built-in amplification and a voltage boost circuit with adjustable gain to better match various audio sources. The L1 MINI consistently operates at a high voltage of 26V, providing a ±12.5V high output amplitude and a maximum 20dB high gain.
• Unique Design and HiFi Clear Sound: Utilizes a double-sided PCB design and an NE5532P op amp with a pluggable socket, allowing for convenient upgrades with other dual op amps for enhanced versatility. The high-quality sealed potentiometer ensures a wide frequency range and excellent dynamic response, delivering smooth, warm, and natural sound with ultra-low distortion.
• Escenaris d'aplicació versàtil: Ideal for boosting the volume of portable audio devices to integrate with home stereo systems, enhancing karaoke or CD/DVD players for lively parties, and providing external volume control for audio sources that lack their own adjustments. Perfect for mixer or speaker setups, audio recording, parties, and live stage esdeveniments.
• Super Mini Size with Durability: Its compact size makes it easy to carry and integrate into any audio system without occupying much space, making it perfect for on-the-go use. The all-metal design ensures durability and shields internal electronics from electromagnetic interference, thereby reducing noise.

3. Producte acabatview i Controls

Familiarize yourself with the various inputs, outputs, and controls of your L1MINI unit.

• Panell frontal:
  • RCA Output (R/L): Connects to your amplificador o receptor.
  • Power Switch / Volume Knob: Turns the unit on/off and adjusts the output volume.
• Tauler superior:
  • 3.5mm AUX / RCA Input Select Button: Toggles between the 3.5mm AUX input and the RCA input.
• Tauler posterior:
  • Entrada DC 5V: Power input port (5.5*2.5mm).
  • RCA Input (R/L): Connects to audio sources with RCA outputs.
  • Entrada AUX de 3.5 mm: Connects to audio sources with 3.5mm outputs.

4. Configuració

4.1 Connexió d'alimentació

1. Connect the provided USB to DC cable to the DC 5V IN port on the back of the L1MINI.
2. Connect the USB end of the cable to a suitable DC 5V power source (e.g., a phone charger or power bank). A power adapter is NOT included.
3. Nota important: It is not recommended to use a computer's USB port to power the L1MINI, as this may cause noise interference.

4.2 Connexions d'àudio

The L1MINI supports various connection scenarios to enhance your audio experience.

1. For Source Matching (e.g., TV, Phone, MP3 Player):
   • Connect your audio source (e.g., Tape Player, TV, Phone, Video Game, iPad, iPod/MP3) to either the 3.5mm AUX input or the RCA input on the back of the L1MINI.
   • Connect the RCA output of the L1MINI to the input of your amplifier or receiver (Destination).
2. In Series with Phono Preamps (e.g., Turntable):
   • Connect your turntable (with low output MM cartridge) to a Phono Preampmés viu.
   • Connect the output of the Phono Preamplifier to either the 3.5mm AUX input or the RCA input on the back of the L1MINI.
   • Connect the RCA output of the L1MINI to the input of your amplifier or receiver (Destination).
3. For Level Control Duty / Long Cable Run (e.g., CD Player/DVD Audio):
   • Connect your audio source (e.g., CD Player/DVD Audio) to either the 3.5mm AUX input or the RCA input on the back of the L1MINI. Keep the cable from the source to the L1MINI as short as possible.
   • Connect the RCA output of the L1MINI to the input of your amplifier or receiver (Destination). A longer cable can be used between the L1MINI and the destination.

5. Instruccions de funcionament

1. Encès: Rotate the Power switch / Volume knob clockwise until you hear a click and the unit powers on.
2. Seleccioneu l'entrada: Press the 3.5mm AUX / RCA input select button on the top panel to choose between the 3.5mm AUX input and the RCA input, depending on which source you have connected.
3. Adjust Volume/Gain: Rotate the Power switch / Volume knob to adjust the output volume and gain level to your desired setting. The L1MINI provides up to 20dB of adjustable gain.
4. Apagar: Rotate the Power switch / Volume knob counter-clockwise until you hear a click and the unit powers off.

6. Manteniment

To ensure the longevity and optimal performance of your Nobsound L1MINI, follow these simple maintenance guidelines:

• Mantingueu la unitat neta netejant-la amb un drap suau i sec. Eviteu utilitzar productes químics agressius o netejadors abrasius.
• Ensure the unit is placed in a well-ventilated area to prevent overheating.
• Avoid exposing the unit to moisture, direct sunlight, or extreme temperatures.
• Desconnecteu l'alimentació quan la unitat no s'utilitzi durant períodes prolongats.

7. Solució De Problemes

• Sense energia:
  • Ensure the USB to DC cable is securely connected to both the L1MINI and a functioning 5V power source (e.g., phone charger, power bank).
  • Confirm the Power switch / Volume knob is rotated clockwise to the 'ON' position.
• Interferència de soroll:
  • If you are powering the L1MINI via a computer's USB port, try switching to a dedicated phone charger or power bank, as computer USB ports can introduce noise.
  • Check all audio cables for secure connections and ensure they are not damaged.
  • Ensure the L1MINI is not placed too close to other electronic devices that might cause electromagnetic interference.
• Volum baix o so distorsionat:
  • Verify that the correct input (3.5mm AUX or RCA) is selected using the input select button on the top panel.
  • Adjust the Power switch / Volume knob to increase the volume and gain.
  • Ensure the audio source itself is providing a sufficient signal.
  • Check connections to your amplificador/receptor.
• Sonic Mismatch Issues (e.g., portable players sounding quieter than home audio):
  • The L1MINI is specifically designed to correct these issues. Ensure it is properly integrated into your audio chain as described in the Setup section. Adjust the gain to match the output level of your other home audio devices.

8. Especificacions

9. Llista d'embalatge

The following items are included in your Nobsound L1MINI package:

• 1 * L1 MINI Stereo Line Level Booster
• 1 * USB to DC Cable

10. Consells d'usuari

To maximize your experience with the Nobsound L1MINI, consider these tips:

• Correct Sonic Mismatch: Use the L1MINI to resolve issues where portable players, MP3s, or computers have lower output volumes compared to other home audio devices, which can lead to distorted sound.
• Enhance Output for Events: Boost the output level of karaoke players or CD/DVD players to transform your stereo music into a more vibrant sound for parties or outdoor events. It provides low-noise and high musical accuracy for both listening and recording.
• External Volume Control: Utilize the L1MINI to provide an external volume control solution for any audio source device or stereo amplifier that lacks its own output level or volume adjustment.
• Op-Amp Actualització: The pluggable socket design for the NE5532P op amp allows for easy upgrades to other dual op amps, offering more customization and sound characteristics.

11. Garantia i Suport

The Nobsound L1MINI comes with a 2 any de garantia, garantint la tranquil·litat pel que fa a la seva qualitat i rendiment.

For any technical assistance, troubleshooting not covered in this manual, or warranty claims, please contact the seller or manufacturer directly through their official support channels. Please have your purchase details and product model number (L1MINI) ready when contacting support.