This is probably a really dumb question. I own a BA330 but the power supply does not work. Is the output from power supply more than when you use batteries?

I guess I can buy one from Roland?

I know if you use the ECO switch the output volume will be decreased to save power, but am not sure of the overall difference. My guess would be that Db's are similar whether it's AC or batteries.

Exactly, Donny. I never thought a battery operated amp could be so BIG in size and sound. Roland has really produced something exceptional with this amp and the associated line of amps.

Cass.......Roland quality is legendary In the music world .......I miss mine.

If practicable, what would be the best setup for using the 330 in tandem with an L1 or other portable PA to achieve true stereo sound from a single keyboard...or would this be overkill for a OMB? I guess I still prefer the two speaker system to seperate sounds for true L/R stero.

Larry, I would run one keyboard out to each amp, separate them, equalize tone and volume and run them in mono. I'm not convinced live stereo is all that great. At least my music doesn't sparkle any more in stereo than it does in mono.