Amplifiers give a complete 3D sound field to any surround sound. After I connected an amplifier to my theater system. I was able to feel each direction of the sound. The sound was creating a virtual sound bubble around me. The whole aroma of the sound was immersive. I was feeling bullets and fast cars running towards me. This immersiveness of sound was absent without an amplifier in the chain. Also, the sound was so detailed. I was able to distinguish between treble, bass, and mids. All levels of sound were there to be enjoyed with great details. My home theater was missing these details before without knowing.