THX Spatial Audio Sounds Like Tin Can

Hello, I used to use the old 2.x Razor Surround Sound Pro and it was perfect but it no longer works so I upgraded to the 3.X THX spatial audio. On the old software, I would turn on the surround sound and use the default EQ and everything sounded great. With the new software, when I turn on the surround sound it sounds echoey, hollow, and metallic. No matter what preset I use, the sound does not sound good at all. It sounds like I am using a cheap 5 dollar speaker. Is there anyway to get a crisp sound out of this software?