What level should my surround speakers be?

In a 5-channel system, the side surround speakers should be located 90-110 degrees off-axis. For the best sense of spaciousness, the tweeter height should be about 2 feet above ear level. In a 7.1 system, dedicated rear surround speakers are placed behind the primary seating position for enhanced rear panning effects.

How do I optimize my surround sound?

How to Optimize Your Home Theater Surround Sound SystemThe Right AV Receiver Can Make All the Difference. Your speakers will only be as good as the signal that reaches them. Find Speakers that Complement the Room. Strategically Place Speakers for Optimal Results. Enhance Your Sound With Acoustic Treatments.22 Feb 2016