Почитал мануал, надо проверить как у меня миды настроены. но вроде миды стоят в large

OFF:When no speaker is connected.
Small:When a speaker that cannot play low frequencies (80 Hz or less) is connected.
Large:When a speaker that can play low frequencies (80 Hz or less) is connected.

Проверил, Динамики стоят в Large