Put a pair in last night between my pre and the amp ( see main rig ) heard an imediate diff but wasent sure if in my head or ears! This morning my wife came into my " man cave" and asked if i did somethind new to my system? Said the bass was comming into her room and shaking her bed! LOL. So i guess the bass extention and depth have truly improved as she had no idea i did anything new!!! Killed two birds with one stone, better sound and pissed the wife off at same time!! This IS a good day to die!