High Max SPL �?At 132dB, this 15-inch loudspeaker can provide high volume degrees making it an pleasing choice for larger gigs. Bose claims that inner sensors detect the orientation of the speaker and adjust the EQ accordingly, automatically. It has a TRS line out for connecting to another system, https://www.bluetoothspeaker.top/loud-stereo-speake-bluetooth-5-0-rgb-lights-bass-sound-wireless-bluetooth-speakers/