I have a good mixer, two large speakers & stands, lots of wires -- and they all weigh a lot, but they work great for large rooms full of people and outdoor venues.  However...

I occasionally have smaller events in smaller rooms with fewer people where the band is acoustic and so am I.  I find myself straining my voice to be heard by the dancers and I'm tired of screaming.

I used to have a karaoke system, but found it inadequate (and I couldn't plug my wireless headset into it).  Are there smaller, less heavy, less cumbersome systems you carry around?  I want to be able to plug my computer into it when I have an event that's not live music or just to use it to amplify my voice over acoustic music (7-8 musicians) -- a couple of small but lightweight speakers.

Help!