15" or 18" which is better

scott s Silver Member Username: Talon01 12 audioque 2.5 144.8 ..., Pa Usa Post Number: 104 Registered: Jun-07	Posted on Thursday, September 13, 2007 - 19:55 GMT for spl i already run iasca stock 1 but what i was thinking was a setup for the local shows that do it on power ratings i have a pg xenon 1200.1 what speaker would get staight spl with that power.
Troy Jones Silver Member Username: Tejcurrent Post Number: 501 Registered: Apr-07	Posted on Thursday, September 13, 2007 - 19:57 GMT Fi BL- no bp option.