AOSHIDA Gustard H26 Discrete Class A Headphone Amplifier-Benutzerhandbuch

1. Einleitung

The Gustard H26 is a high-performance discrete Class A headphone ampLifier und 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 ampschwerer.

Abbildung 1.1: Front view of the Gustard H26 headphone ampVerstärker, Showcasing its sleek black design with a central volume knob and headphone jacks.

2. Produktmerkmale

• Fully Balanced Discrete Class A AmpReiniger: 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.
• Precision Volume Control: 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 PreampReiniger: Die voramplifiertage uses two direct-inserted LME49720 dual op-amps for clear signal processing.
• Flexible Ausgabemodi: Der Kopfhörer 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.

Abbildung 2.1: Intern view of the Gustard H26, highlighting the eight pairs of power transistors used in its fully balanced discrete Class A ampLifier-Design.

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

Abbildung 2.3: Intern view illustrating the matrix relay volume control and the LME49720 dual op-amps used in the preamplifiertage of the Gustard H26.

3. Einrichtung

3.1 Auspacken

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 Verbinden Ihrer Geräte

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

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

• Eingangsanschlüsse:
  • 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).
• Voramplifier Output Connections:
  • RCA-Preamplifier Ausgang: Connect to your power ampVerstärker oder Aktivlautsprecher mit RCA-Kabeln.
  • XLR-Vorverstärkeramplifier Ausgang: Connect to your balanced power ampVerstärker oder Aktivlautsprecher mit XLR-Kabeln.
• Stromanschluss:
  • Wechselstromeingang: Connect the provided power cable to the AC input.
  • Bandtage Auswahl: Stellen Sie sicher, dass die LautstärketagDer Wahlschalter ist auf die richtige Lautstärke eingestellttage for your region (100-120V or 220-240V). Falsche LautstärketagDie falsche Auswahl kann das Gerät beschädigen.
  • Stromschalter: Use this to turn the unit on or off.
  • Sicherung: The fuse holder is integrated into the AC input for protection.

3.3 Erstes Einschalten

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. Bedienungsanleitung

4.1 Lautstärkeregelung

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 Eingangsauswahl

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 Voramplifier 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 ampVerstärker oder Aktivlautsprecher.

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

5. Wartung

5.1 Reinigung

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 Umweltaspekte

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. Fehlerbehebung

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

• Kein Strom:
  • Check if the power cable is securely connected to both the H26 and the wall outlet.
  • Vergewissern Sie sich, dass sich der Netzschalter auf der Rückseite in der Position „EIN“ befindet.
  • Stellen Sie sicher, dass die LautstärketagDer Wahlschalter ist für Ihre Region korrekt eingestellt.
  • Check the fuse in the AC input. If blown, replace it with a fuse of the same type and rating.
• Kein Ton:
  • Confirm that the correct input source is selected on the H26.
  • Check all audio cables (RCA, XLR, headphone) for secure connections.
  • Ensure the volume level is not set to minimum or muted.
  • 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.
• Verzerrter Ton oder Lärm:
  • Check for loose or damaged audio cables.
  • 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. Spezifikationen

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

Abbildung 7.1: Official technical specifications table for the Gustard H26, detailing input, preampVerstärker und Kopfhörer amplifier performance metrics.

8. Garantie und Support

8.1 Garantieinformationen

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 Technischer Support

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.