Hosyond D900 2.1 Channel Bluetooth Receiver Amplifier User Manual

1. Introduction

The Hosyond D900 is a versatile 2.1 channel Bluetooth receiver amplifier designed to enhance your home audio experience. It delivers a powerful 50W per channel for stereo speakers and an additional 100W for a subwoofer, providing a balanced and impactful sound. Featuring Bluetooth 5.0 for stable wireless connectivity, multiple input options (USB, AUX, TF card, RCA), and independent bass/treble controls, the D900 is suitable for various applications, including home theater setups and DIY speaker projects.

Image: Front view of the Hosyond D900 amplifier, showcasing its compact design and control layout.

2. Package Contents

Please check the package carefully to ensure all items are present:

• 1 x D900 Amplifier
• 1 x Remote Control
• 1 x DC Jack Cable
• 1 x AC Power Cord (US Plug)
• 1 x User Manual (this document)

3. Product Features

• Powerful 2.1 Channel Audio Output: Delivers 50W+50W for stereo speakers and 100W for a subwoofer, providing rich and dynamic sound.
• Bluetooth 5.0 Connectivity: Ensures faster pairing, lower latency, and a stable wireless connection up to 33ft (10m).
• Multiple Audio Inputs: Supports Bluetooth, 3.5mm AUX, USB, TF card, and RCA for broad device compatibility.
• Independent Volume & Tone Control: Features separate controls for main volume, microphone volume, subwoofer frequency, subwoofer volume, treble, and bass adjustments.
• Wide Power Supply Compatibility: Operates with DC 12V–24V input and AC 110V–240V, with excellent heat dissipation for stable performance.
• Compact Metal Design: Durable aluminum alloy brushed panel with a clear control layout, ideal for DIY audio projects and desktop setups.

Image: The Hosyond D900 amplifier positioned between two speakers, illustrating its 2.1 channel audio output capabilities.

4. Functions and Interfaces

Familiarize yourself with the various controls and connection ports on the D900 amplifier:

Image: Detailed diagram of the Hosyond D900 amplifier's front panel, labeling all inputs, outputs, and control knobs.

Front Panel Controls (Left to Right):

• MIC1 / MIC2: Microphone input jacks.
• ECHO: Adjusts microphone echo effect.
• MIC VOL: Controls microphone volume.
• L INPUT R: RCA audio input for left and right channels.
• USB: USB input for media playback.
• TF: TF card slot for media playback.
• AUX IN: 3.5mm auxiliary audio input.
• Previous/Play/Pause/Next: Media playback control buttons.
• LED: Power indicator light.
• IR: Infrared receiver for remote control.
• SUBWOOFER FREQ (20-200Hz): Adjusts the subwoofer crossover frequency.
• SUBWOOFER VOLUME: Controls the subwoofer output volume.
• R&L CHANNEL TREBLE: Adjusts the treble for left and right channels.
• R&L CHANNEL BASS: Adjusts the bass for left and right channels.
• VOLUME: Main volume control for all channels.
• DC 12-24V IN: DC power input.
• AC 110-220V IN: AC power input.
• POWER IN: Power input port.
• AC POWER SWITCH: Main power on/off switch.

5. Setup Guide

5.1 Connecting Speakers and Subwoofer

1. Connect your passive stereo speakers to the Left and Right channel outputs on the amplifier. Ensure correct polarity (+ to + and - to -).
2. Connect your passive subwoofer to the Subwoofer Output.

5.2 Connecting Audio Sources

• Bluetooth: No physical connection needed. See Section 6.2 for pairing instructions.
• AUX Input: Use a 3.5mm audio cable to connect your device (e.g., smartphone, tablet) to the "AUX IN" port.
• RCA Input: Use an RCA cable to connect devices like CD players, TVs, or DVD players to the "L INPUT R" ports.
• USB/TF Card: Insert a USB drive or TF card into the respective port for direct media playback.

5.3 Power Connection

1. Ensure the AC POWER SWITCH is in the OFF position.
2. Connect the provided AC power cord to the "AC 110-220V IN" port on the amplifier and then to a wall outlet. Alternatively, if using DC power, connect a DC 12-24V power supply to the "DC 12-24V IN" port.
3. Flip the AC POWER SWITCH to the ON position. The LED indicator will light up.

Image: The Hosyond D900 amplifier shown integrated into a wooden cabinet, demonstrating its suitability for DIY speaker installations, with Bluetooth and IR remote control functionality highlighted.

6. Operating Instructions

6.1 Input Selection

The amplifier automatically detects the input source. When a USB drive or TF card is inserted, it will prioritize that input. For other inputs, ensure the source device is playing audio.

6.2 Bluetooth Pairing

1. Turn on the D900 amplifier.
2. On your mobile device, enable Bluetooth and search for available devices.
3. Select "D900" from the list of devices to pair.
4. Once paired, the amplifier will indicate a successful connection (e.g., a voice prompt or stable LED).

6.3 USB/TF Card Playback

1. Insert a USB drive or TF card containing audio files into the corresponding port.
2. The amplifier will automatically switch to USB/TF input and begin playback.
3. Use the Previous, Play/Pause, and Next buttons on the amplifier or remote control to manage playback.

6.4 Volume and Tone Control

• VOLUME: Rotate the main VOLUME knob to adjust the overall sound level.
• SUBWOOFER VOLUME: Adjust this knob to control the bass output level.
• SUBWOOFER FREQ: Adjust this knob to set the crossover frequency for the subwoofer (20-200Hz).
• R&L CHANNEL TREBLE/BASS: Use these knobs to fine-tune the high and low frequencies of your stereo speakers.

6.5 Microphone Usage

1. Connect a microphone to either the MIC1 or MIC2 jack.
2. Adjust the MIC VOL knob to control the microphone's volume.
3. Use the ECHO knob to add or reduce the echo effect for vocals.

7. Main Component Design

The internal design of the D900 amplifier is engineered for stable performance and efficient power delivery.

Image: Internal view of the Hosyond D900 amplifier, highlighting key components such as the power supply, output stages, and input modules.

• Microphone Howl Suppression: Circuitry designed to reduce feedback when using microphones.
• Wireless Microphone Module Interface: Connector for optional wireless microphone modules.
• Shielding Cover Power Inductor: Component for power regulation and noise reduction.
• Subwoofer Output: Dedicated output for subwoofer connection.
• Left and Right Channel Output: Outputs for stereo speakers.
• LED Banner Lights: Internal indicator lights.
• DC Input 12-24V: Power input section.
• Strengthen Field-effect Transistor: Power amplification components.
• Increase to 220V Transformer: Component for AC power conversion.
• Large Capacity Capacitor: For stable power supply and audio filtering.

8. Usage Scenarios

The Hosyond D900 amplifier is suitable for a variety of audio applications:

Image: The Hosyond D900 amplifier shown with various compatible devices, including cars, laptops, TVs, computers, smartphones, Mac computers, home speakers, and MP3 players, illustrating its wide range of applications.

• Home Theater Systems: Connect to your TV or media player for enhanced sound with stereo speakers and a subwoofer.
• DIY Speaker Projects: Its compact size and robust output make it ideal for custom speaker builds.
• Desktop Audio: Power bookshelf speakers for a high-quality computer audio setup.
• Car Audio (with appropriate power supply): Can be integrated into car audio systems for improved sound.
• Karaoke: Utilize the microphone inputs for karaoke sessions.

9. Specifications

10. Dimensions

The compact design of the D900 amplifier allows for flexible placement and integration into various setups.

Image: Technical drawing of the Hosyond D900 amplifier, showing its precise measurements for both the front panel and the internal board.

• Front Panel Width: Approximately 25 cm (9.84 inches)
• Front Panel Height: Approximately 7.5 cm (2.95 inches)
• Overall Depth: Approximately 8 cm (3.15 inches)

11. Troubleshooting

If you encounter issues with your D900 amplifier, please refer to the following common problems and solutions:

• No Power:
  • Ensure the power cord is securely connected to both the amplifier and the power outlet.
  • Verify the AC POWER SWITCH is in the ON position.
  • Check if the power outlet is functional.
• No Sound Output:
  • Confirm speakers and subwoofer are correctly connected to the amplifier.
  • Check all volume controls (main, subwoofer, source device) are turned up.
  • Ensure the correct input source is selected.
  • Test with a different audio source or cable.
• Bluetooth Disconnection/Cannot Pair:
  • Make sure the amplifier is in Bluetooth mode.
  • Ensure your device is within the 10m (33ft) Bluetooth range.
  • Try unpairing and re-pairing the device.
  • Restart both the amplifier and your Bluetooth device.
• Distorted Sound:
  • Reduce the volume level on both the amplifier and the audio source.
  • Check speaker connections for loose wires or incorrect polarity.
  • Ensure audio cables are fully inserted and not damaged.

12. Maintenance

To ensure the longevity and optimal performance of your Hosyond D900 amplifier, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to wipe the exterior of the amplifier. Avoid using liquid cleaners or abrasive materials.
• Ventilation: Ensure the amplifier is placed in a well-ventilated area to prevent overheating. Do not block any ventilation openings.
• Storage: When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
• Power Off: Always turn off the amplifier using the power switch when not in use.

13. Warranty and Support

Hosyond products are designed for reliability and performance. For specific warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. For technical support or further assistance, please reach out to Hosyond customer service through the official channels provided on the product packaging or the brand's website.