https://www.korg.com/us/products/synthesizers/ek_50_l/

Powerful speakers deliver twice the power
With automatic accompaniment to instantly turn your playing into an entire ensemble, the EK-50 has become a go-to instrument for both beginners as well as advanced players. The EK50 L has the same great features, but double the speaker power. It has a specially designed speaker system that capable of delivering twice as much volume (*) as the EK-50, so you don't have to rely on a PA system. Like the EK-50, it can run on batteries, making it easy to take on the road for performance.