If your sound system have old and new speakers from different manufactures, then your missing high impact surround sound. Different brands have unique and different sound signature. So the sound effect travels from one to another speaker. Also, you need to upgrade your subwoofer. The subwoofer is responsible for adding impact and depth to the sound of your movie tracks. Because subwoofer is most responsible to add impact in the sound. Also, you need to upgrade your subwoofer, center channel.