Gary , the manual that ships with the BA330 list it at 30 watts stereo...Before I purchased the BA330 , I called Roland..because Sweetwater has it listed at 250 watts..and I knew that was wrong..He verified 30 watts...

BTW: I used the BA330 on batteries (Alkaline rechargeable) for over 12 hours, before it drained to stop..that was 3 consecutive gigs at full power (not the ECO reduced range)..

Did you read how loud it is 109db...I will match it against any other PA(in it's class)..some over 60 watts that won't come close to the loudness or quality of sound..

In my Studio I tested the unit continuously for over ten hours and it was still two thirds retained power (gauge)..

I am learning more than you think..