March 21, 2013, 3:53 PM — Here's how you can turn up the speaker volume in Microsoft Surface Pro tablets.
1. Go to Control Panel.
2. Go to Sound.
3. Click on Speakers.
4. Click on Properties.
5. Click on Enhancements.
6. Check the Loudness Equalization option.
7. Apply your changes.
For more, see the original article at the link below.