Why is my computer not recognizing the A2+BT speakers after sleep mode? — Audioengine Skip to Content
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Why is my computer not recognizing the A2+BT speakers after sleep mode?


This issue occurs because some computers fail to "wake up" the USB port after a period of inactivity. While our A2+BT uses UPnP drivers for maximum compatibility, the USB connection is identified as an external DAC by most systems. Recent operating system updates for Mac and Windows have made this issue more frequent. 

1. What solutions can I try to resolve this issue? 

The solution often requires trial and error based on your specific computer setup. Many customers have found helpful tips and solutions in the following resources: 

2. Is there a difference in audio quality when using USB/Bluetooth versus analog connections? 

Yes, there is a difference. Here’s what you need to know: 

  • USB/Bluetooth Connection: This uses the digital-to-analog converter (DAC) built into the A2+BT speakers, which is 16-bit. 
  • Analog Connection (RCA or 3.5mm inputs): This uses the DAC in your computer or device. Since most modern computers support 24-bit or even 32-bit audio, you’ll achieve better sound quality when using an analog connection. 

3. How do I know which connection type is best for me? 

  • If you prioritize convenience or wireless functionality, USB or Bluetooth is a great choice. 
  • If you’re looking for the highest audio fidelity, consider using analog connections like RCA or a 3.5mm mini-jack. 

If you need further assistance, feel free to reach out to our support team. We’re here to help! 

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