ASHATA AC Q3 PRO DAC PC USB Decoding Audio Decoder with Headphone Amplifier User Manual

1. Introduction

The ASHATA AC Q3 PRO DAC is a versatile audio decoding and headphone amplification device designed to enhance your digital audio experience. It features multiple input options, including PC-USB, Optical, and Coaxial, and provides both RCA line-out and a 3.5MM headphone output. This manual provides detailed instructions for setup, operation, and maintenance of your device.

2. Safety Information

• Do not expose this device to rain, moisture, or extreme temperatures.
• Ensure proper ventilation around the unit to prevent overheating.
• Use only the specified DC5V1A power adapter. Using an incorrect power supply may damage the device and void the warranty.
• Do not open the casing. Refer all servicing to qualified personnel.
• Avoid listening at high volume levels for extended periods to prevent hearing damage.

3. Package Contents

Please check the package for the following items:

• AC Q3 PRO DAC Decoder x 1
• Charging Cable x 1
• Fiber Optic Cable x 1
• Data Line (USB Cable) x 1
• Instruction Manual x 1

Image: The ASHATA AC Q3 PRO DAC unit displayed with its accompanying charging cable, fiber optic cable, and USB data cable.

4. Product Features

• Advanced Chipset: Utilizes MS8412+SA9023+NE5532+97220 chipset for optimal audio performance.
• High-Fidelity DAC Decoding: Enhances digital sound quality for a clearer audio experience.
• Integrated Headphone Amplifier: Supports 3.5MM headphones directly.
• Tone Controls: Independent high and low (treble and bass) sound adjustment for personalized audio.
• Multiple Digital Inputs: Features Fiber (Optical), Coaxial, and PC-USB inputs for broad compatibility.
• Stable Analog Output: Gold-plated RCA outputs ensure stable and reliable audio signal transmission.

5. Product Overview and Controls

5.1 Front Panel

Image: Front view of the AC Q3 PRO DAC, highlighting the input selector switch, 3.5mm headphone jack, Bass adjustment knob, Treble adjustment knob, and Volume control knob which also functions as the power switch.

• Input Selector Switch: Toggle between USB, OPT (Optical), and COA (Coaxial) digital audio inputs.
• 3.5MM Headphone Jack: Connect your 3.5MM headphones here.
• Bass Control Knob: Adjust the low-frequency output level.
• Treble Control Knob: Adjust the high-frequency output level.
• Volume Control Knob: Adjusts the output volume. Pressing this knob also serves as the power ON/OFF switch.

5.2 Rear Panel

Image: Rear view of the AC Q3 PRO DAC, showing the DC 5V power input, gold-plated RCA L/R audio outputs, Coaxial digital input, Optical digital input, and PC-USB input.

• DC 5V Input: Connect the provided charging cable here for power.
• RCA L/R Audio Output: Connect to an external amplifier or active speakers using RCA cables.
• Coaxial Input: Connect a Coaxial digital audio source.
• Optical Input: Connect an Optical (Toslink) digital audio source.
• PC-USB Input: Connect to a computer for USB audio decoding.

6. Setup Instructions

Follow these steps to set up your ASHATA AC Q3 PRO DAC:

1. Power Connection: Connect the provided charging cable to the DC 5V input on the rear panel of the DAC, then plug the other end into a suitable 5V power source (e.g., a USB wall adapter or a computer USB port).
2. Audio Source Connection:
   • For PC-USB: Connect the provided USB data line from your computer's USB port to the PC-USB input on the DAC's rear panel.
   • For Optical: Connect a fiber optic cable from your audio source (e.g., TV, game console) to the Optical input on the DAC's rear panel.
   • For Coaxial: Connect a coaxial digital audio cable from your audio source to the Coaxial input on the DAC's rear panel.
3. Output Connection:
   • Headphones: Plug your 3.5MM headphones into the headphone jack on the front panel.
   • External Amplifier/Speakers: Connect RCA cables from the RCA L/R Audio Output on the DAC's rear panel to the corresponding inputs on your amplifier or active speakers.
4. Power On: Press the Volume Control knob on the front panel to turn on the device. The indicator light will illuminate.

7. Operating Instructions

Once the device is set up, follow these steps for operation:

1. Select Input Source: Use the Input Selector Switch on the front panel to choose the desired audio input (USB, OPT, or COA) that corresponds to your connected audio source.
2. Adjust Volume: Rotate the Volume Control knob clockwise to increase volume and counter-clockwise to decrease it. Start with a low volume and gradually increase to a comfortable listening level.
3. Adjust Tone: Use the Bass Control knob to adjust the low-frequency response and the Treble Control knob to adjust the high-frequency response according to your preference.
4. Power Off: Press the Volume Control knob again to turn off the device when not in use.

8. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use liquid cleaners or solvents.
• Storage: Store the device in a cool, dry place away from direct sunlight and excessive dust.
• Cable Care: Handle cables gently. Avoid bending or twisting them sharply, which can damage internal wires.

9. Troubleshooting

If you encounter issues with your ASHATA AC Q3 PRO DAC, refer to the following common problems and solutions:

• No Sound Output:
  • Ensure the device is powered on.
  • Verify that the correct input source (USB, OPT, COA) is selected using the front panel switch.
  • Check all audio cable connections (input from source, output to headphones/amplifier) are secure.
  • Increase the volume on the DAC and your connected audio source/amplifier.
  • If using PC-USB, ensure the DAC is selected as the default audio output device in your computer's sound settings.
• Distorted or Poor Sound Quality:
  • Check the quality of the input audio source.
  • Ensure all cables are in good condition and properly connected.
  • Reduce the volume if the distortion occurs at high levels.
  • Adjust Bass and Treble controls to see if they are causing unwanted effects.
• Device Not Powering On:
  • Verify the power cable is securely connected to the DC 5V input and the power source.
  • Ensure the power source (e.g., USB wall adapter) is functional.
  • Press the Volume Control knob firmly to ensure it engages the power switch.

10. Specifications

11. Warranty and Support

This product comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided at the time of purchase or contact your retailer. For technical support or service inquiries, please contact the ASHATA customer service department or your authorized dealer.