60W biamplification (15W x 4) Delivers lush audio. Two 3″ woofers Along with two 3/4″ Mylar tweeters and 2 passive radiators create a rich cross-spectrum soundscape. Compatible with most Bluetooth-enabled smart devices For wide-ranging use. 4 ohms impedance Per driver efficiently conducts power. Bluetooth 3.0 interface With A2DP v1.3 and AVRCP v1.5 support lets you wirelessly link with compatible devices.