Hi, I'm pretty new to recording, and I just got a Yamaha mixer, and my drum mics. I see there is no mic input and I'm guessing I need a griffin imic? I was wondering, would these work with my bose speakers? The bose speaker has a volume controller that connects to the headphone port on my Ibook G4, but it also has a mic input, I'm guessing this would work, but the main problem I've been having is muting the internal mic.. It can't mute all the way, even with the volume all the way down.. Anyone have any suggestions?