I just bought a pair of JBL MRX515 and a QSC PLX 1804 amp. Now I'm finding out that the amp is too small and there is a possibility it could blow my speaker due to lack of power! The 1804 is not bridgeable so I can't get the full effect (Is was I hear from guitarcenter) they said i needed the 1802 and it would be good... do i have to sell the 1804 and get a new amp now? crown xti2000? or something... what would be the best amp for these speakers and should i be worried about the plx1804 pushing them currently? I also has the allen and heath pa12-cp that has built in amps does anyone have a brillant plan that i can use these speakers for my acoustic show this week.... I also have a pair of jrx monitors. and would love to have an acoustic monitor mix during this show.... help please!