I have a new shop that i will be having get togethers at, deminsions are 50x50x18 Insulated with 5" of open cell foam and lined with metal, and concrete floor. I was going to power a pair of La Scala, and a pair of kp362 speakers with a denon 4311 reciever (140wpc). then i was going to use the sub out to an adcom 555 amp to a pair of kp400 subs. As i have no experience setting up a system am i doing anything wrong? How should i place all of the speakers, and should i suspend the subs and fire the subs down to the concrete? Do i need a crossover for the subs or will the reciever using the sub out do the job. How will this system sound?