a group i am a part of is considering purchasing a pair of RF-3's and an H/K 320 as a gift. my question is if the 320 is powerful enough to make the RF-3's play without distortion. i know the formula for power vs dB increase and that the Klipsch's have a sensitivity of 98dB, but the room these will be in is pretty big with two open entrances. i'd say the room is 25x40 with 12' ceilings. listening position will be about 12' from the speakers. we dont need it to play at reference level or anything...just loud enough for people to hear. we're kinda tight on cash but could possibly spring an extra $200-300 for a 2-ch amp if it's really needed. would an external amp be necessary for this situation?