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		 Bandpass is a type of enclosure...it's ported on one side of the speaker and sealed on the other.  900rms I think is enough.  I ran 1500 rms through three 12" and it hit...hard.  But I had a sealed enclosure.  Bandpass are made for boomy types of bass like hip hop.  So it really depends on what kinda music you listen to 
		
	
		
		
		
		
		
	
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