Hello, My first post in the audio section. Hopefully I am posting in the right section. I just bought Atlantic Technology 2400LR for only $169, I thought that was an amazing deal. Just received the shipment and I must say the built quality is amazing. Hookup was pretty simple with my old Denon AVR2700 receiver. Put on my favorite CD and sound is pretty good but I was expecting to be blown away which did not happen. The sound seems very thin and not fully filled. I don't have a Sub yet, could that be a reason for the average sound? Will adding a sub will completely change the way they sound? or is it really my amp that needs to be upgraded? I really like the deal and don't want to return these speakers. I need some expert opinions.