Hello everyone, im new to Fi and have decided to try out one of their drivers, however i need some help. I just recently ordered a 12 BL D2 w/ cooling on the 18th and went down to a local shop where im getting the box made eventually and showed the guy the BL's specs which i had written down so he could get an idea of what he would be building. He took a look at the driver's FS of 37.8hz and thought i was crazy for getting a sub with such a high FS...saying it would suffer in lower frequencies. So i starting thinking perhaps i should of got a Q instead of a BL. Ive got a Nine.1 @ 1200 rms to throw at it for Daily Driving...not SPL comp/burping, etc, just a street beater type of a deal. He was thinking of a box about 2 cuft @ 32hz...which seemed about right on. Ive already sent an email to Fi asking if i could change my order to a Q instead of the BL due to the lower FS and id imagine better for Daily Driving...but havent got an answer yet. Is this possible to do before the driver is built? Is it even worth switching to a Q or would i be fine with the BL? BTW this guy has never heard of Fi, RE or eD...only big box brands ie Kicker, Alpine, JL and stuff his store carries...so im not sure how much he really knows but he is a "professional" installer. Also is there any other way to contact Fi directly ie a phone number? Thank you for reading this and any input would be great.