does OD-11 have overload protection? February 27, 2018 11:13 yes, on overload of the internal class-d amplifier the output level is limited. Related articles OD-11, is apple’s airplay 2 supported? OD-11 - how loud can i play on it? how do i upgrade my speakers? can i connect more than two speakers together? how do i connect an ortho remote to OD-11?