Adjusting the bitrate up will increase stream quality while adjusting down will decrease quality. Adjusting the bitrate down can help if you are trying to stream from a location where the internet connection is less than ideal.
1) In EBS, click the "Settings" button.
2) Click the "Output" tab.
3) Adjust the bitrate. Recommended is 2500 (2.5mbps). Lowest recommended is 1000 (1mbps).