I only use my s1 pro's for live gigs using arranger kb and vocals and after almost a year I think they are the best little speaker on the market hands down. As for them sticking to the poles, it says in the manual not to use poles with waffle style adapters to make them fit. This will cause the eq switch to stick making the speaker difficult to remove. I still love mine.
I don't use a mixer but go straight out of the pa1000 one cord to left speaker and the other cord to right speaker. No clipping at any volume.
MEL