AOSHIDA Gustard H26 Discrete Class A Headphone AmpManuale utente lifier

1. Introduzione

The Gustard H26 is a high-performance discrete Class A headphone amplifier e preamplifier designed for audiophiles. It features a fully balanced circuit design, robust power delivery, and versatile input/output options for an exceptional audio experience. This manual provides detailed instructions for setting up, operating, and maintaining your H26 amppiù vivace.

Figura 1.1: Davanti view of the Gustard H26 headphone amplificatore, showcasing its sleek black design with a central volume knob and headphone jacks.

2. Caratteristiche del prodotto

• Fully Balanced Discrete Class A Amplificatore: Utilizes 8 pairs of power transistors for sufficient drive and control, ensuring high-fidelity audio reproduction.
• Versatile Headphone Connectivity: Equipped with 6.35mm unbalanced, 4.4mm balanced, and 4-pin XLR balanced headphone outputs.
• Controllo del volume di precisione: Features a matrix relay volume system, ensuring consistent 4-way volume adjustment without distortion or bias.
• Dual Toroidal Transformers: Incorporates two custom 50W audio-specific toroidal transformers, one for each channel, to prevent interference and provide stable power.
• High-Performance Preamplificatore: Il preamplificatore stage uses two direct-inserted LME49720 dual op-amps for clear signal processing.
• Modalità di output flessibili: La cuffia amplifier power can be switched off separately, allowing the H26 to function as a pure preamplifier output. Preamplifier outputs can also be deactivated for easy switching between headphone and speaker listening.

Figura 2.1: Interno view of the Gustard H26, highlighting the eight pairs of power transistors used in its fully balanced discrete Class A ampdisegno di lfier.

Figura 2.2: Close-up of the two 50W audio-specific custom toroidal transformers inside the Gustard H26, designed to prevent channel interference.

Figura 2.3: Interno view illustrating the matrix relay volume control and the LME49720 dual op-amps used in the preamplificatore stage of the Gustard H26.

3. Impostazione

3.1 Disimballaggio

Carefully remove the Gustard H26 from its packaging. Inspect the unit for any signs of damage during transit. Retain the packaging for future transport or storage.

3.2 Collegamento dei dispositivi

Refer to the diagram below for a clear understanding of the rear panel connections. Ensure all connections are secure before powering on the device.

Figura 3.1: Detailed diagram of the Gustard H26 rear panel, showing all input and output ports, power connections, and controls.

• Connessioni di ingresso:
  • RCA Input (x1): Connect your single-ended audio source (e.g., DAC, CD player) to the RCA input jacks (Right/Left).
  • XLR Input (x2): Connect your balanced audio sources to the XLR input jacks. The H26 provides two sets of balanced XLR inputs (XLR1 and XLR2).
• Preamplifier Output Connections:
  • Preamplificatore RCAamplifier Uscita: Connettiti al tuo potere ampdiffusori acustici o attivi che utilizzano cavi RCA.
  • XLR preamplifier Uscita: Connect to your balanced power ampdiffusori acustici o attivi che utilizzano cavi XLR.
• Collegamento elettrico:
  • Ingresso alimentazione CA: Connect the provided power cable to the AC input.
  • Voltage Selezione: Assicurare il volumetagIl selettore è impostato sul volume correttotage per la tua regione (100-120 V o 220-240 V). Vol non correttotagLa selezione può danneggiare l'unità.
  • Interruttore di alimentazione: Use this to turn the unit on or off.
  • Fuse: The fuse holder is integrated into the AC input for protection.

3.3 Accensione iniziale

After all connections are made and the voltage is correctly selected, press the power switch on the rear panel to turn on the H26. The front panel display will illuminate.

4. Istruzioni per l'uso

4.1 Controllo del volume

The H26 features a precise matrix relay volume control. Rotate the large knob on the front panel clockwise to increase volume and counter-clockwise to decrease it. The current volume level will be displayed on the front panel.

4.2 Selezione dell'ingresso

Use the input selector button (typically on the front panel, refer to the device for exact location) to cycle through the available RCA and XLR inputs. The selected input will be indicated on the display.

4.3 Headphone Output Usage

Connect your headphones to one of the three front panel jacks: 6.35mm (unbalanced), 4.4mm (balanced), or 4-pin XLR (balanced). Ensure your headphones are compatible with the selected output type. The H26 can drive a wide range of headphones.

4.4 preamplifier Functionality

The H26 can function as a dedicated preamplifier. To use it as a pure preamplifier, you can switch off the headphone amplifier power separately. Consult the front panel controls or menu options (if available) for this setting. This ensures that only the preamplifier section is active, optimizing performance for connected power ampdiffusori acustici o altoparlanti attivi.

Figura 4.1: The Gustard H26 integrated into a home audio system, demonstrating its use with a remote control for convenient operation.

5. Manutenzione

5.1 Pulizia

To clean the exterior of the H26, use a soft, dry, lint-free cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the finish. Ensure the unit is powered off and unplugged before cleaning.

5.2 Considerazioni ambientali

Place the H26 in a well-ventilated area to prevent overheating, especially given its Class A operation. Avoid direct sunlight, heat sources, and areas with high humidity or dust. Do not block the ventilation openings.

6. Risoluzione Dei Problemi

If you encounter issues with your Gustard H26, please refer to the following common troubleshooting steps:

• Nessun potere:
  • Check if the power cable is securely connected to both the H26 and the wall outlet.
  • Verificare che l'interruttore di alimentazione sul pannello posteriore sia in posizione "ON".
  • Assicurare il volumetagIl selettore è impostato correttamente per la tua regione.
  • Check the fuse in the AC input. If blown, replace it with a fuse of the same type and rating.
• Nessun suono:
  • Confirm that the correct input source is selected on the H26.
  • Check all audio cables (RCA, XLR, headphone) for secure connections.
  • Assicurarsi che il livello del volume non sia impostato al minimo o disattivato.
  • If using as a preamplifier, ensure the connected power amplifier or active speakers are powered on and functioning correctly.
  • If using headphones, ensure they are properly plugged into the correct jack and are functional.
• Distorted Sound or Noise:
  • Controllare che i cavi audio non siano allentati o danneggiati.
  • Ensure the input source is not sending an excessively strong signal that could cause clipping.
  • Verify that the H26 is placed away from potential sources of electromagnetic interference (e.g., Wi-Fi routers, mobile phones).
  • If using balanced connections, ensure both ends are properly balanced.

7. Specifiche

The following table details the technical specifications of the Gustard H26 Discrete Class A Headphone Amplificatore:

Figura 7.1: Official technical specifications table for the Gustard H26, detailing input, preamplifier e cuffie amplifier performance metrics.

8. Garanzia e supporto

8.1 Informazioni sulla garanzia

The Gustard H26 is covered by a manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region and retailer. Please retain your proof of purchase for warranty claims. For detailed warranty information, refer to the documentation provided with your purchase or contact your retailer.

8.2 Supporto tecnico

If you require technical assistance or have questions not covered in this manual, please contact your authorized AOSHIDA retailer or the manufacturer's support channels. When contacting support, please have your product model (H26) and purchase information readily available.