I have a set on my 42" TV and they work well, but I wouldn't recommend them for your Tyros. Have you seen the Kustom/Powerwerks PA50? http://www.musiciansfriend.com/pro-audio/kustom-pw50-personal-pa-system I used a pair of them for my s910 and thought they were decent. I regularly use a Bose Compact or a Roland BA-330.