LG Electronics NB2530A Sound Bar System with Built-In Dual Subwoofers and Bluetooth With a 100W amplifier and built-in dual upward firing subwoofers, the NB2530A delivers robust sound in an easy to setup package. Stream music wirelessly via Bluetooth from your smart phone for a more versatile listening experience. 2 optical inputs allow you to connect multiple audio devices at once for your convenience. The wall mountable design allows you the flexibility to put the sound bar where it looks and sounds best.