The speaker is equipped with 2 INPUT channels with separate level management: CH 1 mic/line (selectable with switch button) with jack and XLR-F connection and CH 2 with minijack connection. The OUT channel (jack) allows link to another BBM speaker. BBM’s great versatility is completed by a clear, undistorted sound performance even at high sound pressure levels (up to 109 dB): the CLIP led indicates when the signal get distorted. In that case you only need to turn down levels of active IN channels.